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VOLUME 3 NO. 5 ronrorT a Lnear Acceieraoor tenter VOLUME 3 NO. 5 DECEMBER 18, 1972 I Amm m m - I- i n NL I M E ' 'SH SA METAINGS TODAY la SLAC Director Dr. Panofsky has in- stituted an expanded series of general meetings dealing with all aspects of SLAC - budget status, technical and scientific progress reports, and the like. Speakers will include members of the staff in ad- dition to Dr. Panofsky himself. The first in the expanded series is being held today in the Auditorium at 8:30, 1l:00, 1:00, and 4:00. If you haven't gone to one yet, try to make arrangements with your supervisor to attend a later one. The next general meeting will be held early in 1973. A bit of joviality preceding the site tour. From left to right, rrotessor rel Snln-Cnang, Professor Chang Wen-Yu, Mr. Liu Chung-Jen (U.N. representative), Professor Pai Chieh- Fu, and Dr. Panofsky. Behind Dr. Panofsky are Alex Tseng and Guy Alitto, interpreter. Members of what is understood to be the first multi-disciplinary scientific delegation to leave the People's Republic of China since the Cultural Revolution visited SLAC on the morning of Monday, December 11. The group was headed by Professor Pei Shih-Chang, Director of the Biophysics Institute at the Academia Sinica and Member of the Standing Committee of the National People's Council. Deputy Leader was Professor Pai Chieh- Fu, Presidium Member of the Scientific and Technical Association of the PRC, and leading member of the Peking Municipal Bureau of Science and Technology. Other members of the group were Professor Chang Wen-Yu, Vice-Director of the Institute of Atomic Energy of the Academia Sinica; Professor Chien Wai- Chang, a dynamicist; Professor Chien Jen-Yuan, a polymer chemist and Director of the Chinese Chemical Society; Mr. Hu Shih-Chuan, a biochemist; Mr. Li Sera Election The SLAC Emergency Relief Association, now four years old, has reached its original capital goal. In an unusual step for an organization depen- dent on contributions, SERA has asked its members who contribute more than the $6 per year minimum to reduce their con- tributions by 25 percent in order to help balance income and outgo. The semi-annual election of a director of SERA will be held in the Orange Room at noon, Monday December 18. Loy Barker, Mel Card, and Finn Halbo served on the nominating committee and have presented a slate of candidates: Ken Crook, Slim Harris, and George Owens. All members are urged to attend the election meeting. Fu-Sheng, a computer scientist, and five attache-interpreters. The group met in the Central Lab Orange Rooms for refreshments and was then taken on a site tour by SLAC Director W. Panofsky, assisted by Engineer Alex Tseng, Engineering Physicist Martin Lee, and Public Information head, Doug Dupen. First stop on the site tour was a visit to the accelerator housing via the Sector 4 stairway. Assisting here were G. Loew, D. Tseng, and T.V. Huang. The group was then given an overall view of the Research Yard from the hill east of the yard and then shown End Station A and the Counting House. Assisting with this part of the tour were R. Taylor and D. Sherden. The visitors departed around noon for a luncheon at the Stanford Faculty Club. Apprentic e Ed Guthrie of the Mechanical Fabrication Shops' Structural Fabrication and Assembly Shop recently became the first Stanford employee to become a journeyman after completing an on-the- job apprenticeship program. At a lunch on November 30 Ed's supervisor, George Cruickshank, presented him with a certificate attesting to his successful completion of the formal apprenticeship program in combination welding, certified by the Division of Ap- prenticeship Standards of the Department of Industrial Relations of the State of California. In order to meet the standards for certification, Ed had to complete 8000 hours of training. He began the program in August, 1968. During the apprenticeship period, he did all kinds of welding on such projects as the structural support for the 96,000-wire SPEAR magnetic detector, LASS, and various spark chambers. Other people involved in training Ed were Herm Zaiss, Stan Butler, and Tony Sanchez, all of Mechanical Fabrication Shops. Completion of the program was contingent upon SLAC's approval of Ed's work. Ed Guthrie lives in San Francisco. There are currently four other em- Program ployees in apprenticeship programs at SLAC. Felix Vargas and Ken Gibson are working as machinist apprentices in MFS under the supervision of Marion Adams. Pasqual Pimentel is also a MFS machinist apprentice, under Ray Pickup. Tony Barrera is working as an electrician ap- prentice in the Crafts Shop, under Phil Davies. BEAM LINE Changes This is the end of the BEAM LINE! At least as it has existed heretofore. Starting in mid-January, the BEAM LINE will appear much more often (every two weeks initially, then weekly (and with a new format. Bernie Lighthouse, Kathleen Maddern and Steve Kociol will edit the new version. The idea is to present more "topical" news and articles and to do it more often and at less cost. The new BEAM LINE will by typed at SLAC and printed, in part, at SLAC in Pete Munzell's Print Room. Tentatively, it is planned that the format will be 11 inches by 17 inches, printed on both sides, with pictures and drawings on one side, printed commercially, and the other side printed at SLAC. I ____I_ I__la_·l__· _____I· __CI _IX1 _ · 7ut r'ie. ara uates s--- " "" U U ^"~"^ 1 I uruic;IsnanK, nerin ziu , anu "t:K y rlJ tuxizi%;L. Il~~db~~ Bl~~~t~~~ gmr ~~lb~~s~Ad Alaainland China Grouprr Visits SLAC Dec. I I
Transcript
Page 1: 7ut r'ie. ara uates Apprentic - SLAC · 2011. 4. 13. · present implies the possibility of predicting the future and reconstructing the past. Competing views are that the unconstrained

VOLUME 3 NO. 5 ronrorT a Lnear Acceieraoor tenterVOLUME 3 NO. 5 DECEMBER 18, 1972

I Amm m m - I- i nNL I M E ' 'SHSA METAINGSTODAY la

SLAC Director Dr. Panofsky has in-stituted an expanded series of generalmeetings dealing with all aspects of SLAC- budget status, technical and scientificprogress reports, and the like. Speakerswill include members of the staff in ad-dition to Dr. Panofsky himself.

The first in the expanded series is beingheld today in the Auditorium at 8:30, 1l:00,1:00, and 4:00. If you haven't gone to oneyet, try to make arrangements with yoursupervisor to attend a later one.

The next general meeting will be heldearly in 1973.

A bit of joviality preceding the site tour. From left to right, rrotessor rel Snln-Cnang,Professor Chang Wen-Yu, Mr. Liu Chung-Jen (U.N. representative), Professor Pai Chieh-Fu, and Dr. Panofsky. Behind Dr. Panofsky are Alex Tseng and Guy Alitto, interpreter.

Members of what is understood to be thefirst multi-disciplinary scientificdelegation to leave the People's Republicof China since the Cultural Revolutionvisited SLAC on the morning of Monday,December 11.

The group was headed by Professor PeiShih-Chang, Director of the BiophysicsInstitute at the Academia Sinica andMember of the Standing Committee of theNational People's Council.

Deputy Leader was Professor Pai Chieh-Fu, Presidium Member of the Scientificand Technical Association of the PRC, andleading member of the Peking MunicipalBureau of Science and Technology.

Other members of the group wereProfessor Chang Wen-Yu, Vice-Director ofthe Institute of Atomic Energy of theAcademia Sinica; Professor Chien Wai-Chang, a dynamicist; Professor ChienJen-Yuan, a polymer chemist andDirector of the Chinese Chemical Society;Mr. Hu Shih-Chuan, a biochemist; Mr. Li

Sera ElectionThe SLAC Emergency Relief

Association, now four years old, hasreached its original capital goal. In anunusual step for an organization depen-dent on contributions, SERA has asked itsmembers who contribute more than the $6per year minimum to reduce their con-tributions by 25 percent in order to helpbalance income and outgo.

The semi-annual election of a director ofSERA will be held in the Orange Room atnoon, Monday December 18. Loy Barker,Mel Card, and Finn Halbo served on thenominating committee and havepresented a slate of candidates: KenCrook, Slim Harris, and George Owens.

All members are urged to attend theelection meeting.

Fu-Sheng, a computer scientist, and fiveattache-interpreters.

The group met in the Central LabOrange Rooms for refreshments and wasthen taken on a site tour by SLAC DirectorW. Panofsky, assisted by Engineer AlexTseng, Engineering Physicist Martin Lee,and Public Information head, DougDupen.

First stop on the site tour was a visit tothe accelerator housing via the Sector 4stairway. Assisting here were G. Loew, D.Tseng, and T.V. Huang.

The group was then given an overallview of the Research Yard from the hilleast of the yard and then shown EndStation A and the Counting House.Assisting with this part of the tour were R.Taylor and D. Sherden.

The visitors departed around noon for aluncheon at the Stanford Faculty Club.

Apprentic eEd Guthrie of the Mechanical

Fabrication Shops' Structural Fabricationand Assembly Shop recently became thefirst Stanford employee to become ajourneyman after completing an on-the-job apprenticeship program.

At a lunch on November 30 Ed'ssupervisor, George Cruickshank,presented him with a certificate attestingto his successful completion of the formalapprenticeship program in combinationwelding, certified by the Division of Ap-prenticeship Standards of the Departmentof Industrial Relations of the State ofCalifornia.

In order to meet the standards forcertification, Ed had to complete 8000hours of training. He began the program inAugust, 1968. During the apprenticeshipperiod, he did all kinds of welding on suchprojects as the structural support for the96,000-wire SPEAR magnetic detector,LASS, and various spark chambers.

Other people involved in training Edwere Herm Zaiss, Stan Butler, and TonySanchez, all of Mechanical FabricationShops. Completion of the program wascontingent upon SLAC's approval of Ed'swork.

Ed Guthrie lives in San Francisco.There are currently four other em-

Programployees in apprenticeship programs atSLAC. Felix Vargas and Ken Gibson areworking as machinist apprentices in MFSunder the supervision of Marion Adams.Pasqual Pimentel is also a MFS machinistapprentice, under Ray Pickup. TonyBarrera is working as an electrician ap-prentice in the Crafts Shop, under PhilDavies.

BEAM LINE Changes

This is the end of the BEAM LINE! Atleast as it has existed heretofore.

Starting in mid-January, the BEAMLINE will appear much more often (everytwo weeks initially, then weekly (and witha new format.

Bernie Lighthouse, Kathleen Maddernand Steve Kociol will edit the new version.The idea is to present more "topical" newsand articles and to do it more often and atless cost. The new BEAM LINE will bytyped at SLAC and printed, in part, atSLAC in Pete Munzell's Print Room.

Tentatively, it is planned that the formatwill be 11 inches by 17 inches, printed onboth sides, with pictures and drawings onone side, printed commercially, and theother side printed at SLAC.

I ____I�_ I�__la_�·l__· _____I· __CI� _I�X�1� _ ·

7ut r'ie. ara uates

s--- " "" U U ^"~"^ 1

I

uruic;IsnanK, nerin ziu , anu "t:K y rlJ tuxizi%;L.

Il~~db~~ Bl~~~t~~~ gmr ~~lb~~s~Ad

Alaainland China GrouprrVisits SLAC Dec. I I

Page 2: 7ut r'ie. ara uates Apprentic - SLAC · 2011. 4. 13. · present implies the possibility of predicting the future and reconstructing the past. Competing views are that the unconstrained

John Carey - behind his camera and ready for action!

by John Carey(Ed. Note: After discovering John Carey'spursuit of California history through"travel-film" photography, we asked himfor a first-hand account for the Beam Lineof some of his filming experiences.)

The question most on my mind thesedays is: Can I make a feature lengthmotion picture of events of a century ago?Can a travel-history film be produced tomatch the professional standards oftoday? I'm gambling that it can.

About fifteen years ago, for no par-ticular reason, I purchased an adjustablecamera. It was a medium good 35mm ofthe type so popular with the amateurs thenand today. If was great fun to make photosof the family, and of the kids doing all sortsof foolish things. Those pictures are stillenjoyed, but before too long, I felt the needto do something a little more worthwhile.

The beauty of the natural world throughthe viewfinder needed advertisement.Even common dandelions, enlarged to full-screen, produce magnificent displays thatthe hand of the artist finds it hard tomatch. That became such a consuminginterest that nine years ago, after a monthwith SLAC, I took a leave and studied inYosemite under Ansel Adams, the masterphotographer.

California has enough to offer thephotographer to keep him busy for adecade and more. The Sierra andYosemite are the first that come to mind,and Lassen Volcanic National Parkperhaps is the second. But the lesserknown ranges are equally as beautiful, ifnot as spectacular. My family and I havemade many journeys into some of thewilder corners of the state just to see whatwas there. The Warner range, in thenortheast, has one type of scenery and theSanta Lucias have another type, quitedifferent.

Desert ranges are so unique that anentirely new method of investigation ofthem is necessary before photography canbegin. The physical requirements of thedesert demand sppcial preparation ofequipment and transportation. A sign onthe north road into Death Valley, for in-stance, informs you that "Next Services 83miles". The sand blowing from the dunesin Eureka Valley is sufficiently fine to ruin

machinery in either a camera or engine.Do you dare ford the alkaline lake in thebottom of Saline Valley? There was a saltworks there once, with a tram up the InyoMountains and down the other side.

Our adventures have sparked an interestin California history. Markers, placed byvarious organizations and supervised bythe state, informed us that a particularevent occurred, and gradually these beganto form a pattern. More formal anddirected study was undertaken afterconsideration of adding to the pictures athird dimension - that of motion. So itfollowed, that, in order not to have simplya collection of animated snap shots, weneeded to create a coherent story line andthis led naturally to an assembly of all thefactors: photography, travel, Californiahistory, and the desire to impart theseinterests to others in the strongest andmost convincing way possible.

"RIVERS OF GOLD", the story ofmining and the men who mined, is theresult. Our tale is of an imaginarycharacter, Will 0. Wisp, who experiencesthe vagaries of mining and its modestsuccesses. He will never become notable,for he follows an illusion from one bonanzato the next. The rich strike is always in thenext gulch, and so he finds he has traveledfrom Sutter's Fort to Coloma, then toCrescent City. Will returns to San Fran-cisco, for he has .at last enough dust totake home, but a night on the BarbaryCoast forces a change in plans. Returningto the diggin's, he starts prospecting southand decides, about the time he reachesHavilah, that the gold is gone (the Placergold anyway) and that the thing to do is gofor borax in the desert. This takes himfrom Bodie to Yuma, and from theBristlecone Pine area at 14,000 feet toBadwater at -280 feet. He will suffer theconsequences of the summer desert aswell as the chill of winter nights. Even-tually he will depart for the east afterspending forty or fifty years trying to getrich quick.

The lure of California's rich history plusthe excitement of meeting fascinatingcharacters whose lives enrich our own,and hopefully others, are the reasons forour gambling on a travel-history film.None of the small-time casino stuff for us.

by Pierre NoyesFor over two thousand years Western

philosophers have struggled with twoconflicting descriptions of time. One viewis that both past and future are completelydetermined. Complete knowledge of whathas and will happen is denied to finitehuman minds, yet some theisticphilosophies hold that God has this com-plete prescience, while some athesticphilosophies maintain that determinism isthe unalterable consequence of immutablescientific laws. Either belief says that, inprinciple, complete knowledge of thepresent implies the possibility ofpredicting the future and reconstructingthe past. Competing views are that theunconstrained actions of the gods, or theunpredictable choices of free humanbeings, or some intrinsic randomness builtinto the structure of the universe, makesboth past and future increasingly chaoticas one looks either forward or backward intime.

Physics employes both models, and likephilosophies or religions which try to find apath between the two extreme views citedabove, tries to reconcile them."Classical" physics, which burgeoned outof the Scientific Revolution of the seven-teenth century, was primarily deter-ministic, while quantum mechanics in ourown century has usually been taken toimply increasing chaos as one looks far-ther into either past or future. Since thebasic laws of both classical and quantumphysics are reversible in time, neitherfinds it easy to account for many everydayexperiences. For example, if a hot and acold body are put in contact and insulatedfrom their surroundings, we find that,following the usual human sense of thedirection of time, they will come closerand closer to a common temperature.Thus a physicist (unless he is strugglingwith a philosophical problem) presentedwith a sequence of observations of theirtemperatures will unhesitatingly assertthat time was moving forward if he readsthe record in the direction of decreasingtemperature difference, or backward ifthe hotter body is growing hotter and thecolder body growing colder. But he hasgreat difficulty in "proving" (using eitherclassical or quantum physics) whether hehas (or has not) in fact misread the timedirection of the record as it would havebeen given by a clock in touch with the restof the universe. To put the case moredramatically, contemporary physicistscannot guarantee that even if yourrefrigerator is , working properly, an icetray (by a very unlikely chance) may notstart to boil.

Thus physics as taught and used in oursociety seems to contradict everydayexperience. Few of us believe that we canactually alter the past, yet most of us actas if we believed that our acts can havesome effect on the future. Symmetryunder time reversal is only one of threesymmetries that physicists used to believewere absolute, at least at the level of theelementary particle interactions. Theyalso held that any experiment viewed in amirror was also an experiment whichcould conceivably be carried outi, and thatthe same would be true if particles wereexchanged with their anti-particles. One ofthe most significant results achieved bythe high energy accelerator laboratoriessuch as the Stanford Linear AcceleratorCenter has been to prove that none of these"obvious" assumptions are true. The firstbreakthrough came in the fifties when Leeand Yang suggested that the mirror imageof certain experiments might not pictureexperiments which it is possible to carryout on the surface of the earth. Ex-perimental proof of this hypotheses that"parity" is not conserved was soon for-thcoming, but it was still possible toassume that the mirrored experimentcould be performed on a planet composedof anti-matter (i.e. in which the atoms ofthe chemical elements are made up ofelectrons with positive electric charge and

the nuclei of the atoms have negativeelectric charge). But detailed study of K-meson decay here and elsewhere even-tually proved that the decay of anti-K-mesons does not mirror the decay of K-mesons. Current theory requires, and ithas since been shown experimentally, thatK-meson decay occurs because of an in-teraction that is not reversible in time. ButK-mesons are, so far, the only elementaryparticles with this peculiar property; ithas not been able to connect up this effectwith any of the other known facts aboutother particles. This unique example of thefailure of the usual symmetry under timereversal is so weak that ways to connect itup with the obvious lack of time reversalinvariance in everyday life have remainedcompletely obscure.

Fortunately, the accumulation of ex-perimental information and theoreticalspeculation over the last half centry hasfinally led to a reinterpretation of the lawsof quantum mechanics which might beable to remove this paradox. The theory isstill highly controversial. The basic idea itcontains is that the past is indeed fixed andunique, but can only partially be recon-structed from present evidence. In con-trast, the future can be predicted only tothe extent that the relative likelihood ofdifferent events which are allowed by thebasic laws of energy and momentumconservation can be calculated. Since, formost processes, the predictions of the newapproach coincide with earlier results, itwill be difficult to devise crucial ex-perimental tests. But the conceptual gainis already of great philosophicalsignificance.

In the historical past the philosophicaland scientific controversies over deter-minism and free will have allowed bothsides in religious struggles to call onphysics for support of their particulartheologies. For example, Calvin held sostrictly to the deterministic model that hetaught that God decided before he createdthe world who would be damned and whosaved. In contrast, Counter-ReformationCatholics emphasized the importance ofthe free choice of the individual betweensalvation and damnation, although theyfound this difficult to reconcile with theomnipotence of God. In human terms, thisconflict was, for a time, quite literally aburning issue. More recently, somethinkers have tried to invoke the un-certainties inherent in quantummechanics to justify a belief in free will,but many find their arguments un-convincing.

It may be that if this new interpretationof quantum mechanics bears fruit, aconjecture which only the uncertain futurecan decide, physics will once again be ableto reclaim its old title of "NaturalPhilosophy" in a profoundly significantway. If the past is indeed fixed, butdetermines the probabilities of futureevents, study of the past can provide asignificant guide to present action. Theincreasing precision which historical,evolutionary,and cosmological study hasgiven to our understanding of how we havearrived at the current planetary crisislends hope to this view. Yet if all we canpredict are probabilities, we are not forcedto choose courses which are likely to leadto disaster. We can always, with somefinite hope for success, choose a morehumane course of action. It is a tribute tothe inherent wisdom of the peoples of thisworld that they have mainly taken thisattitude of responsible moral choice, inspite of the erudite teachings of theirtheologians, philosophers, and scientists.

'Job Board'SLAC's Personnel Office has put up a

"job board" just outside their door (238A&E Bldg.). All the openings at SLAC,campus, and the Medical School andHopsital are listed there. Every SLACemployee interested in seeing whatpositions are available is urged to stop byand find out what opportunities exist.

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Page 3: 7ut r'ie. ara uates Apprentic - SLAC · 2011. 4. 13. · present implies the possibility of predicting the future and reconstructing the past. Competing views are that the unconstrained

by Charles OxleyIn the study of high energy processes

with gamma rays derived from the SLACelectron beam it is a great advantage tohave sources of polarized and essentiallymono-energetic gamma rays. Twomethods that have been used at SLAC arethe back-scattered laser beam andcoherent radiation from a diamondcrystal. Soon to be tried at SLAC is anultra-thin diamond crystal which, withcollimination, will provide a mono-energetic, highly polarized gamma beam.

In an ordinary target electrons radiategamma rays mainly in near collision withthe nuclei of the material. Electrons in this

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chamber at SLAC. Its disadvwlow yield, and comparatively 1a 20 billion electron volt elproduce 7 billion volt gamma

Another technique to be trierthe use of a very thin diamctogether with tight colliidefinition of the angle at whichrays are used. This technproposed by John Dewire of (Bob Mozley of SLAC, is beingCharlie Sinclair, usingdiamonds prepared here by ]

With the regular diamostructure it is possible withelectrons to create polarized

Photon energy spectrum

5 10 15Photon Energy k (GeV)

collision are deviated and accelerated,producing a continuous spectrum ofgamma rays from the lowest energies tothe full energy of the electron beam. Thisbremsstrahlung - German for "breakingradiation" - is often difficult to use ex-perimentally, because of its wide-spreadinenergy. Sometimes, in a particularlysimple process, measurements on finalproducts can be traced back so as to definea unique initial gamma energy. For manyprocesses, however, a difficult subtractiontechnique must be used in which the dif-ference between the resulting processesfrom two different initial electron energiesis compared. It is a great advantage tohave essentially mono energetic beams,

With mono energetic gamma beams, thestudy of high-energy processes can beundertaken, but when more detailed in-formation is desired, to decide betweencompeting theories or models, polarizedgamma rays and polarized targets maybecome desirable and decisive.

The laser technique, in which red lightfrom a ruby laser is run against theelectron beam over a long path and in-teractions occur resulting in mono-energetic polarized gamma rays, has beensuccessfully used with the 82" bubble

SLAC Maior Medical PlaThis time each year many employees

review their medical expenditures in-curred during the previous calendar yearfor purposes of itemizing their medicalexpenses on income tax returns. Whetheryou intend to itemize these expenses ornot, this is also a good time to review theapplicability of Major Medical Insuranceto any medical expenditures.

Stanford's Major Medical plan isdesigned to pay 80 per cent of practicallyall medical expense incurred by an in-dividual for one or a series of illnesses orinjuries, in excess of an annual deductibleamount, up to $25,000. If an employee orhis dependents have coverage under one ofthe three Stanford Basic Health Insuranceplans, the deductible is $100 in medicalexpenses not otherwise covered or paid bythe basic plan. Without a base plan andregardless of whatever partial benefitsreceived from other health insurancecoverage, if any, the deductible is $500 intotal incurred expenses.

Covered medical expenses includecharges incurred for hospital ex-penses;fees of physicians, surgeons, andphysiotherapists; X-ray and laboratorytests; prescription drugs and medicines;

energetic gamma beams atangle. The graph shows th(pected. This is a cooperatprocess in which no single nuradiates but the whole crystcontribution and takes up tvery thin crystal is requiredthicker crystal the electron,their original precise directsmall encounters with the icrystal. To be effective onevery well defined electron be;a thin crystal, so as not to losebeam direction and also precof the angular extent of the gIn a planned experiment in Ethe diamond target will be300 feet from a collimator hior an inch in diameter ashielding.

To find and prepare diam(for use in the SLAC beam asearch was initiated three ye,MIT group. The physicarequire that single crystals rconglomeration of small crysAfter much searching, twofound that were not of top gezwere extremely satisfactorpurposes. Ordinarily, diE

and other medical servicesauthorized or prescribed byFor any individual coveredmedical plan, expenses mayfor services privided any tcalendar year in which the cIn addition, covered mediincurred during the last thione calendar year may be usor part of the deductible foyear. That is, for example,extablish a claim in 1971,incurred from October 1,December 31, 1972 couldestablishing a 1972 calendar

Obviously, in a brief nevdifficult to cover all the f<Major Medical insurance peven though our basic healthexcellent protection againprolonged medical expeMedical claims are notassociated with "major" iincreasing costs, we submitwith drug purchases as thpocket expenses involved.

For further informationMedical Insurance, drop bOffice in Room 238, A&E Bius on Ext. 2357.

antages are cleaved along natural planes and thenow energy: ground and polished. The natural cleavageectron will planes are not suitable for the crystalrays. orientation desired in the SLAC ap-

d this fall is plications. So the diamonds were sawedand crystal, and then ground and polished, yielding 1/4"

mation or x 1/4 x 1 / 16" thick diamonds. These were

the gamma used in End Station A by an MIT-SLAClique, first collatoration. For the proposed collimatedCornell and coherent bremsstralung team, thepursued by crystals need to be thinned from theirultra-thin approximately 12 mil(thousandths of an

Ed Garwin. inch) thickness to a range of around threend crystal mils. Ed Garwin has succeeded in doinghigh-energy this by use of a sputter-etch technique.

and mono Sputtering is a process in which an elec-trical discharge in a gas dislodgesmaterial from one surface and deposits iton another. Withl metals, a simple, airectcurrent discharge in a noble gas producesfilm deposits with relative ease. In thesputtering process the gas is first ionizedand then the ions (and electrons) gainenergy from the field. When the energeticions strike a metal surface they produceintense local heating which may dislodge'afew metal atoms from the surface. Thesefind their way to a surface to be coated. Inattempting to sputter material from anelectrical insulator, difficulties arise

20 because the surface rapidly becomeschanged by the loss or addition of elec-

2099A1 trons so that the electric field is severelyreduced and the discharge ceases. The

a particular technique that avoids this is a radioe results ex- frequency glow discharge. When theive coherent electric field is such as to drive electronscleus as such to a surface, the charging is quite rapid;al makes its and the local electric field is quicklythe recoil. A erased. On the other hand, when a field isbecause in a reversed and the ions are sped toward thes would lose surface, the heavier and slower movingion by many ions take more time to reduce the field.atoms in the During that time effective sputteringmust have a action can occur.am direction, In the setup in Garwin's lab, an old radiothe eincident transmitter borrowed from the SLAC ham

ise definition club, applies voltage to two copper elec-amma beam. trodes, shown in the sketch. On oneand Station A, electrode, which is water cooled, a quartz

placed about plate is placed and the diamonds stuck onDie only3 / 32 it with silicone vacuum grease. The regionnd in heavy is filled with argon gas at a low pressure of

0.002 torr. While a glow discharge is run,onds suitable about two mils of diamond are etched byconsiderable sputtering each day. To thin the diamondars ago by an takes about four to five days. After the1 propertiesrather than astals be used. Cill e p hstones were Do you prefer rhythm and blues, rock,

m quality but backwoods banjo, jazz, classical music -y for SLAC or would you rather have a calliope?amonds are Two SLAC employees, Wilbur Wolfe and

Peter Pines, have informed the SLAC|B f Beam Line of plans for the installation of

the historically popular carnival in-and supplies strument here on the site.

byour doctor. Always a congenial group, the Scannersby this major like to have music around during workbe submitted hours in order to bring some fun and

lime during a lightness into the otherwise near black-outlaim is based. conditions in their chambers. Apparently,

ical expenses however, there has been some difficulty inred meet all preserving AM-FM radios in the depart-

ed tho met.u ment because of others who also enjoystheir te ensuingt music but on a decidely more exclusiveif you did notall expenses listening basis.

1971 through Partly as a solution to the Recurringbe used in Ripitoff Problem, Mr. Wolfe, Mr. Pines,

year claim. and Mr. Alfred Smelt of Employeevs article it is Relations, propose the calliope, a moreeatures of the permanent source of musical enjoymentlan, However, for all concerned. A vendor has beeni plans provide selected from a now-defunct circus troupest heavy and which was willing to sell to SLAC for onlyunses, Major $35.00 an almost new calliope and

necessarily generator which together, weigh 5 tons.llnesses. With Powered by the steam generator, whicht many claims will be located outside the A&E Building,e only out-of- the calliope itself would be located in the

Scanning Department's NRI room inabout Major Central Lab, and would certainly provide

y the Benefits the needed musical refreshment for SLACuilding, or call Scanners.

As was stated in the plan (according to a

diamond has been thinned it is removed byuse of a solvent and transported by meansof a miniature vacuum lift. It is extremelyfragile, being about half the thickness of amicroscope cover glass. Mounting thediamond is a problem of some difficultywhich Joe Murray, Charles Sinclair, EdGarwin, Ed Seppi and others are trying tosolve. Background and safetyrequirements dictate that there be aminimum of material near the diamond.Also, precise orientation and freedomfrom vibration and bending stress isrequired.

The beam from the diamond will first beapplied in experiment E-78 by aUniversity of Washington group. Thatexperiment studies the inclusive reactiongamma + proton goes to pi + plusanything. The experiment was originallycontemplated as a subtraction experimentwhich in simplified terms consists ofrunning electrons at one energy, collectingthe data resulting from all energies in thebremstralung spectrum and then runningat a slightly lower energy and collectingsimilar data. Then the difference betweenthe two results in ascribed to the gammarays between the higher electron energyand the lower one. This subtractiontechnique involves small differencesbetween very large numbers and suffersfrom statistical inaccuracies. With thepossibility of a thin diamond making anessentially mono energetic beamavailable in End Station A, the experimenthas been replanned to make use of thisfacility. Trials of the thin diamond areplanned for the fall and the experiment isscheduled to start in January, 1973.

We do not have room to discuss in anydetail another new method of gammapolarization in use at SLAC. However, inthat new methods proposed at Frascatiand tested at Cornell, an ordinarybremstralung beam is run through a longsingle crystal of graphite. The resultinggamma rays are expected to be about 25percent linearly polarized. As compared tothe laser beam or the diamond beams,these have the advantage that thebremstralung spectrum is polarized all theway to the tip. Therefore these are thehighest polarized gammas currentlyavailable. This method is presently in usein End Station A.

In liedrecent psychological study made at SLAC,presumably in the Scanning Department),the tootling sounds of a calliope wouldunquestionably raise the work-efficiencyof the scanners, not to mention the in-creased adrenalin flow of the physicistsand workers directly above the calliope on2nd and 3rd floors of Central Lab.

Instead of morning coffee, now SLACemployees can really come awake with thefirst blast of our new music-maker, the

(Editor's note: If you believe this you'reas "believing" as one person in the PublicInformation Office was. The plan wasseriously presented as a newsworthyarticle by two SLAC wits (all names arefictitious) who are now very low on ourcredibility rating, and we are high on theirnaivite scale. It was intended as a joke onsomeone, but we never found out who.)

(

n m a 0 Damnd

Page 4: 7ut r'ie. ara uates Apprentic - SLAC · 2011. 4. 13. · present implies the possibility of predicting the future and reconstructing the past. Competing views are that the unconstrained

Kung-Fu Prby K. Maddern

On October 6 SLAC had the honor ofhaving as a guest Professor Kuo LienYing, one of the few masters during ourtime of the ancient Chinese martial art,known as Kung-Fu. Professor Kuo hasbeen a teacher of Kung-Fu for over half acentury and is a specialist in Chinesetherapy. He teaches Tai Chi Chuan Shao-Lin, Shing-Yee, Bak-Quok, and InternalSystem, all of which are different forms ofKung-Fu. Also with Professor Kuo werehis wife and 5-year old son, and hisstudent. Professor Chiang Yun-Chung, an

Professor Kuo (called Sei-Fu) waitedamid the hubbub until the distinctlycharged moment arrived for Sei Fu tounderstand and signal that the activitymust begin. With Alex Tseng of SLACtranslating for an audience of about 300,Sei-Fu enthusiastically greeted all andsaid in part that "Tai-Chi is not only goodfor your health but will actually cure yoursickness..." "We will present some of thebasic principles of Tai-Chi Chuan toyou..."

Professor Chiang came forward, bowedto the audience and first began to performBak-Quok, circling in ballet-like rhythmwith sweeping, harmonious hand and armgestures. A feeling of constant energy flowwas generated through the disciplinedinteraction of mind and body. The 64movement of Tai-Chi were next executedin a powerful, graceful form of thoughtand action fused into oneness ofmovement. His body was a study in con-

Vacuum Technology CourseA course entitled "Introduction to

Vacuum Technology" has been added toSLAC's "De Anza and Foothill College"classes for the Winter Quarter beginningWednesday January 3, 1973. The course isoriented primarily for the designer ortechnician who wishes to become morefamiliar with vacuum equipment,techniques and practices.

The one prerequisite for the course isMathematics 200 or equivalent (structureof arithmetic). The course will be offeredin the Electronics Conference RoomMonday, Wednesday and Friday 8-9 A.M.(3 hours / week lecture-lab). Those in-terested may contact Richard Callin, x-2433. Registration will be held during thefirst two regular class sessions.

esentationservation of energy as he extended hisarms and legs in a series of pulling,striking, and bending motions - always abalanced thought behind each balancing ofthe physical body - a demonstration ofthe power of peaceful thought when ap-plied in dynamic action to the humaninstrument.

The audience was a unit of activesilence, all attention drawn to ProfessorChiang's demonstration. Next, MartinLee, who has studied Tai-Chi for 3 yearswith Professor Kuo, was persuaded by histeacher to perform some of themovements of the art. Professor Kuo'syoung son and wife also performed.

Finally, Sei-Fu himself stepped forwardin his flowing robes and seemed to com-mand even the air around him as he begana type of movement which could besomewhat described as the burning of aliving fire in the form of a man. All themovements of Kung-Fu which wereperformed in slow motion by the other 3guests were as a deep, unseen formstructure in Sei-Fu whose free-formgovernment over his own life force had allthe elements of an offensive militarystrategy, only in the reverse context ofbeing positive and life-constructive.

Sei-Fu's government over himself is theresult of many years of working with hisown energy of being, which, channeledthrough a powerful discipline such asKung-Fu, has come to be used more forhealing purposes than for self-defense.-. Our thanks go to Martin Lee for makingProfessor Kuo's visit possible. For moreinformation on either Kung-Fu or onspecific instances of people who havedirectly benefited from it, please callMartin Lee or Joe Jurow.

SLAC Counselingby Leonard Sagan, M.D.

Although most SLAC employees willcome to us with medical problems, par-ticularly those that are job related, thereseems to be some reluctance to consult theMedical Department for emotionalproblems such as alcoholism, drugs, ormarital problems. Although it is con-siderably easier to treat broken bones thanbroken marriages, it is often helpful just tohave somebody who can listen and we aregood at that.

There is an array of resources availablein the community of which many peopleare unaware. Furthermore, getting intothe system is not easy and we may be ableto facilitate that. Just as for any medicalproblem this consultation will be treatedwith strict confidentiality.

If referral to a psychiatrist should bearranged, your Major Medical Plan willpay half of the cost of such consultationabove the deductible of $100 althoughmaximum benefit is limited to $500 peryear.

Because of the bewildering nature of themental health establishment, it is plannedsoon to have a noon session in the SLACauditorium during which we will offer abrief explanation of the mental healthfield, - who and what is available for help.When this is scheduled, it will be an-nounced in the "All Hands Bulletin.".:

In Case You're Wonderingclass were: 1st place, A. Schmierer, 2nd

(KenMoore of SLAC Crafts Shop won the place, G. Putallaz; 3rd place, J. Escalera.four-mile sprint around the accelerator In the 35-49 category, 1st place, K. Moore;which took place (way back) in late 2nd place, J. Alcorn; 3rd place, M. Berndt.August on a hot summer day.) In the 50 and over class, 1st place, C.

In true Olympian style, a flaming torch Hoard; 2nd place, Bob Rowe. In the.(rolled-up computer printout) carried in women's class, the undisputed winner wasby Charlie Howard sprinting up to Sector Lydia Campbell.30 gate brought the professional sports- Dr. Neal presented ribbons to all run-man's light touch to the first annual ners as well as 2 trophies to Ken Moore -Long Distance Run at SLAC. About 200 one to take home and the other to remaincurious SLAC'ers gathered to watch the here at SLAC with his named engraved onevent under a very hot midday sun. it. Next year's winner will also have his

There were four classes of runners: (1) name placed on the SLAC trophy.34 years and under, (2) 35 years to 49, (3) Dr. Neal also suggested a possible job50 and over, and (4) women. transfer for Ken to the Klystron Main-

The race started a few minutes late in tenance crew if that group ever ex-order to wait for one hopeful runner who periences a shortage of electric carts.had forgotten his track shoes - finally therace had to start without him.

Explanation of rules by Bill Lusebrink,countdown, and off! Runners headed downthe north side of the accelerator, withenthusiastic bicyclers who wanted to eye-witness the entire 4 miles (but not on foot)pedaling right along beside them.

Participants were: Ken Moore, AlanSchmierer, Gerard Putallaz, John Alcorn,Justin Escalera, Bud Oliver, Ted Syrett,Philip Limbacher, Elliott Gibson,Raymond Brown, Martin Berndt, RonBodwell, Charlie Hoard, Bruno Cole,Randy Jung, Bob Rowe, Lydia Campbell,Greg Minshall, Joe Descharme, and AlexGallegos.

After the take-off, spectators mean-dered slowly around to the south side of theaccelerator to wait for the finished.

The first five runners to arrive at thefinish line were: (Ken Moore, 24 minutes,24 seconds; (2) Alan Schmierer, 25:55; (3)Gerard Putallaz, 26:17; (4) John Alcorn,27:04 (5) Justin Escalera, 27:10. Bycategories, the winners in the 34 and under

P1O PersonnelMerge

Expanded hours of service is one of thenew features resulting from the recentamalgamation of the Personnel Depart-ment and the Public InformationDepartment. Both are now housed in onearea, Rooms 238 and 240 on the secondfloor of the A&E Building. The newlycombined PPI Department is open forbusiness continuously from 7:00 a.m. to5:30 p.m. Please feel free to drop byanytime to talk about benefit matters,personal problems, job matters, transferapplications, other opportunities, trainingprograms, tuition refund arrangements,noon programs, guided tours of SLAC,orientation programs, SLAC literatureand pamphlets, meeting rooms, and anyother special matters that seem to needattention.

In particular, Kathleen Maddern wouldwelcome ideas for special noon programs.

SLAC Employees' Caucus?by Jack Truher

Periodically some of us get involved in ashort-lived attempt to create for non-faculty staff a body of elected represen-tatives which would be recognized byuniversity management. This is differentfrom labor organizing because the goal isalways simply to constitute a universitycommittee to provide valid representationfor non-faculty staff of the sort the facultyhas made for itself. The idea of a StaffCongress keeps popping up, and othersimilar designations. The latest to surfaceis the SLAC EMPLOYEES' CAUCUS.Recently a friend commented, "What doyou think this is, the United States ofAmerica?"

I did a little survey of my own last week.The response of people that I know wastypically, "Absolutely, that's a good idea.Certainly. Ho-Hum. Where's my lunch?"The reaction is mildly affirmative, butnever enough to provoke mad glandularenthusiasm. Actually that's the way I feelabout it, too. I mean, yes and no.

The duality we all sense about this sortof thing is worth worrying about. Haven'tyou noticed a certain glassy-eyed, glazedwithdrawal about everybody? Lookaround at the Christmas crowds. Mayhave to polish up your glass eye first.Alistair Cooke, who made the new T.V.series, "America, a Personal View," isquoted recently to say, "There'stremendous sag now in morale, not unlikethe cynicism and fatigue of France a yearor two before World War II. Americansalways thought they could roll up theirsleeves and beat anything, and they'vedone it time and again. But they don'tbelieve that any more. It's sad."

The decision to stop struggling is not justsad, it is death - the end. Our littlemicro-world at SLAC has all the elementsof outside. Yes, the United States has beenthe best country in the world--but ifeverybody just quits, it's sure to be theworst. SLAC is a marvelous place to work,but things don't spontaneously stay thatway. Countries and institutions are put

together by people. They just don'tnaturally bloom. Somehow I get the feelingI'm being sucked down the vortex of awhirlpool of withdrawal, and before I gounder, I'd like to scream--just once more.

My conclusion on the Caucus is that I'mmildly against it. A caucus without staffdetermination, without staff struggle, isjust a propaganda agency for the statusquo, for weakness, for nothing. Without anaroused staff, don't bother.

Still, management around here would beresponsive to staff pressure, to assembledstaff sentiment, if the staff would just get ittogether. There are two parts to theproblem. The "wheels" don't have ittogether, and the staff is worse. But the oldrules aren't working, and you know it.

-Actually the Caucus is of more interestto management, according to my polls,and for good cause. Industrialpsychologists and educators are routinelydescribing similar processes throughoutsociety. "Johnny is turned off at school,"can be laid right alongside "Mr. or Mrs.Johnny Smith is turned off at work," andthe literature reads the same except forthe titles. Lots of people know what'swrong. Johnny and his parents are alldeactualized by their history ofautomated, non-participatory experience.And they're all miserable. Johnny fallsasleep in class, gets into pot and bennies,and hides in his room or someplace worse.All my old hyperventilating high-achieverfriends have now taken to dreaming about"early retirement", or "dumping all thisand going back" to some small town. Ialways say, "It's all in your head." If youfind that farm, or that little house andstore in a small town, you'd better leaveyour brain and the rest of your living partsin the city, because there's a record of theworld stuck in there. It's not what we'redoing that's bothering us; it's what we'renot-doing that's bothering us. Runningaway from not-doing anything means wewill only arrive where we started: at thedepressing land of not-doing. We do notneed a Caucus of dreamers. Forget thewhole thing. Glub-glub-glub.


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