Beams Division Seminar

Configuration Management inthe Tevatron – Alignment

Ray Stefanski

March 6, 2003

CM focuses on controlling outcomes.

CM controls change, making sure that its impact is assessed and that every effort is made to prevent erosion of functionality or safety.

Configuration Management

Applies to any complex system, but we willconcentrate today on Tevatron magnet alignment and stability.

Organization

I would like to discuss alignment roughly alongchronological lines, beginning last Summer when Ifirst got involved. Our baseline dates to 1995.We will cover:

1. Data base development.2. Elevations.3. Roll measurements.4. Continuous elevation monitors.5. Smart Bolt measurements.6. Summary

Contributors:

Bruce HannaJim VolkBob BernsteinTerry SagerGeorge WojcikAMGChuck BrownMike ChurchAndrey ChupyraVladimir Shiltsev

Mike SyphersMCRDave AugustineMechanical TechsDon EdwardsTodd JohnsonDuane PlantJim WilliamsDave HardingBruce BrownJohn CarsonJamie BlowersRay Hanft

Hans JostleinCrag MooreAimin XiaoJean SlaughterDave RitchieNorm Gelfand

Quad Elevations from GW

1995Quad Elevations

40.25

40.35

40.45

40.55

40.65

40.75

40.85

0 1000 2000 3000 4000 5000 6000 7000

L (M)

Ele

va

tio

n (

inc

he

s)

Dipole Elevations 05/00

40.250

40.350

40.450

40.550

40.650

40.750

40.850

0 1000 2000 3000 4000 5000 6000 7000

Z (m)

Ele

vati

on

(in

ces)

Mike Syphers

Murphy Line

Distance between station* and Murphy Plug

22.4364

22.4366

22.4368

22.437

22.4372

22.4374

22.4376

22.4378

0 50 100 150 200 250

Murphy Plug #

(in)

Computer works

Murphy Plugs in Lab Coordinates

-1500

-1000

-500

0

500

1000

1500

-2500 -2000 -1500 -1000 -500 0 500

X (m)

Y (

m)

Configuration of Tevatron

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0 50 100 150 200

Murphy Plug #

Dif

fere

nce

(in

)

DX_cal

DY_cal

DX_cal_f

DY_cal_f

The Murphy-line differs from the “ideal.”At each station, the difference is about 10 mils.The accumulated beam-offset after one sector is >250 mils.We might take this seriously, if we knew where the Murphy-line was.

BD Development

• We’re working on a PC RIM DB for magneticfield data. We would like to combine this withAlignment data in the same DB.

• We want to monitor corrector magnet settings more closely to follow changes as they occur from store to store. Use of SDA.

Elevations

The Tevatron now has a vertical network, tied to the Lab coordinates.

A1 under repair today.A14-1 may be an example.

B Sector

40.20

40.30

40.40

40.50

40.60

40.70

40.80

40.90

1,100 1,300 1,500 1,700 1,900

Z(m)

ele

va

tio

n (

inc

he

s)

B14-1B15-1B16-1B16-2B16-3B16-4B16-5B17-1B17-4B17-5B18-1B18-2B18-3B18-4B18-5B19-1B19-2B19-3B19-4B19-5B21-1B36-1B37-1B38-1all quadsB15-2B15-3B15-4B21-2B21-3B21-4B22-1B22-2B22-3B22-4B22-5B23-1B23-2B23-3B23-4B23-5B24-1B24-2B24-3B24-4B24-5B25-1B25-2B25-3B25-4B25-5B26-1B27-1B28-1B32-1B33-1B34-1B35-1

B-sector with more data

B15-1B16-1

B17-1

Some history of B16-1 and its neighbors.

• Memo dated 05/24/99 Mike Church to Alignment Group:

• Elevation of B-16-1 increased from 40.387”to 40.443” on 05/25/99.

• Elevation of B-16-1 increasedto 40.541” on 03/15/00.US of D-15-5 changed to 40.517”.

location vertical change daterequested from completed5/24/99 as-found

b11(low beta Q!) 0b12(low beta Q5) 0B13-1 0B14-1 +.060" 05.25.99B15-1 +.060" 05.25.99B16-1 +.060" 05.25.99B17-1 0B18-1 -.060" 05.25.99B19-1 -.060" 05.25.99B21-1 -.040" 05.25.99B22-1 -.040" 05.25.99B23-1 -.040" 05.25.99B24-1 0B25-1 0

Elevation of B16-1 is 40.76” measured on 11/19/02.

Thanks to Terry Sager.

Aperture Scan 01/07/03

Aperture Scan looks ok!

Typical Tev apertures:Quad 3 inchDipole 2.7 inchC0 lambs ~1 inchB16-1 = 1.36 inch

Thanks to Dan Bollinger and Todd Johnson.

CHAURIZE, SALAH J. 03/05/2003

A14-1 Quad

A14-2 Dipole

Spool to Dipole

Quad to Spool

Example of mismatch in elevation.

Spool

Quad to Spool toDipole interface.

Survey and realignment in this area is presently taking place.

A0 to A1

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

100 150 200 250 300

Z (m)

Ele

vati

on

(in

ch)

A15-2

A15-3

A15-4

A15-5

All Quads

A16-1

A18-1

A18-2

A18-3

A18-4

A18-5

Elevation Data at A0 and A1

We really have insufficient data on elevations. We may be missing some important discrepancies.

Results of the Level Run

B-sector elevation corrections

B-Sector Elevations

40.25

40.30

40.35

40.40

40.45

40.50

40.55

40.60

40.65

40.70

40.75

40.80

1100 1350 1600 1850

Z (m)

Ele

3vat

ion

s (i

nch

)

ElevationsCorrected Elevations1995 Quad Elevations

Shift is 17.5 mils

E-Sector Elevations

R2 = 0.1067

40.50

40.55

40.60

40.65

40.70

40.75

40.80

40.85

40.90

4300 4500 4700 4900

Z (m)

Ele

vati

on

(in

ch)

Elevations

Corrected Elevations

1995 quad elevations

Trendline - 1995 quadelevations.

E-sector elevation corrections

E28-2

E17-1 E34-5

Shift is –39.4 mils

Talyvel Clinometer

953 more to go!

Comparison with Survey Data

0

1

2

3

4

5

6

7

8

9

10

Difference in mrad

Fixture vs Jun 02 data

Fixture vs Jan 03 data

Comparison with Survey Data

-6

-4

-2

0

2

4

6

8

10

250 300 350 400 450 500

Z (m)

Ro

ll (

mra

d)

01-Jan-03 (Hans)

14-Jun-02 (fixture)

24-Jan-03 (elevations)

A19 to A 26

-1.813.02

1.784-1.522

outliers

A Jun 2002 -0.0263 0.2063063 A Dec 2002 0.0181 0.1300

Sector Date Ave. Standard Diff. Deviation

A Nov 2001 -0.2000 0.1537 A Jun 2002 -0.0263 0.2063 A Dec 2002 0.0181 0.1300

B May 2000 -0.3162 0.1140 B Nov 2001 -0.0326 0.0843 B Dec 2002 0.0264 0.0682

C Nov 2001 -0.2245 0.0864

D May 2000 -0.3167 0.1211 D Nov2001 -0.2337 0.1039 D Feb 2003 0.0890 0.1275

E Nov 2001 -0.3459 0.1912 E Dec 2003 0.0759 0.1068

F Nov 2001 -0.3331 0.0704

Comprehensive Comparisonwith Survey

Some outliers

Roll vs Corrector

-0.20

-0.10

0.00

0.10

0.20

-4 -2 0 2 4 6 8 10

Roll

Co

rre

cto

r a

ng

le

Correlation – Roll vs MFGHorizontal Correctors vs Roll

-0.20

-0.10

0.00

0.10

0.20

-4 -2 0 2 4 6 8 10

Roll (mrad)

MF

G (

mra

d)

Quads with Large Rolls

9-Nov 14-Jun 19-Nov2001 2002 2002

Hans Shim survey surveyFxtre milscompilation 2003

A15-1 4.18 60 1.28 4.19A16-1 2.75 0 2.75A23-1 2.16 0 4.12 2.41A24-1 2.44 0 3.62 2.98A25-1 3.80 60 2.53 3.68

C24-1 3.04

D46-1 2.17 0 -0.03 none

E32-1 2.97 0 4.91 noneE39-1 2.56 0 4.06 noneE43-1 2.59 0 2.09 none

Many of the Yr 2000 results were corrected. Corrected data will be added soon.

The acceptable limit is 3.0 mrad.

TwistMagnet Twist

-5

-4

-3

-2

-1

0

1

2

3

0 1000 2000 3000 4000 5000 6000

Z (m)

Tw

ists

(m

rad

)

A21-3 2.97A21-4 1.18A29-4 1.14B13-2 -1.03B15-3 1.64B16-5 1.15B37-2 2.13C10-4 -2.11C14-5 1.03C15-2 -1.25C16-2 -1.21C17-5 -1.01C24-2 -1.17C47-1 -1.11D16-1 1.13E19-2 1.41E26-1 1.01E26-3 -1.16E28-4 -4.63E29-5 1.98F12-4 -1.2

Magnets with twistGreater than 1 mrad.

-4

-2

0

2

4

6

8

10

0 1000 2000 3000 4000 5000 6000 7000

Z (m)

Ro

ll (m

rad

)

MR Dipoles Removed

Dipooles Present

All TeV Magnets

Effect of MR Magnet Removal

MR not MRRemoved Removedmrad mrad

504 445

0.576 0.613

0.013 0.010

Total TeV magnets

Mean

Standard Deviation

Status of Nearby Directly Above and Main Ring Magnets Above on Either Side Removed 13(61.9%) 38(64.4%) Remaining 8(38.1%) 21(35.6%)

Roll:

Twist:

Location Roll (mrad)A15-1 4.176279A15-4 5.689188A18-3 4.100939A19-2 6.638064A21-2 7.931061A21-3 6.858994A214 4.875719A22-5 4.131482A23-3 3.835213A23-5 4.634428A24-5 3.668243A25-1 3.803651B16-1 Poor elevationB22-3 4.311687 3 SHIM RIB22-4 3.249801 3 SHIM RIB25-2 3.957386 3 SHIM RIC15-4 4.827868 3 SHIM RIC24-1 3.04007 3 SHIM RID46-4 5.31656 REPEAT WITH 1/8 INCH SHIM

Pockets of Interest

A21-3 2.97A21-4 1.18A29-4 1.14B13-2 -1.03B15-3 1.64B16-5 1.15B37-2 2.13C10-4 -2.11C14-5 1.03C15-2 -1.25C16-2 -1.21C17-5 -1.01C24-2 -1.17C47-1 -1.11D16-1 1.13E19-2 1.41E26-1 1.01E26-3 -1.16E28-4 -4.63E29-5 1.98F12-4 -1.2

Magnets with twistGreater than 1 mrad.

Number ofSector Magnets

Measured>1 >2 >3 >4 >5 >6 >7 in sector.

A 42 24 12 9 4 3 1 163

B 41 16 3 1 161

C 14 4 2 1 154

D 16 5 1 1 1 156

E 47 18 163

F 6 156

Total > N 166 67 18 12 5 3 1 953

Roll Angle > N mrad

Distribution of larger rolls in the

Tevatron.

17.4% have rolls> 1 mrad.

No. ofSector Magnets

Measured>1 >2 >3 >4 >5 >6 >7 in sector.

A 25.3% 35.8% 66.7% 75.0% 80.0% 100.0% 100.0% 163

B 24.7% 23.9% 16.7% 8.3% 161

C 8.4% 6.0% 11.1% 8.3% 154

D 9.6% 7.5% 5.6% 8.3% 20.0% 156

E 28.3% 26.9% 0.0% 0.0% 163

F 3.6% 0.0% 0.0% 0.0% 156

17.4% 7.0% 1.9% 1.3% 0.5% 0.3% 0.1% 1166 67 18 12 5 3 1 953

Roll Angle > N mrad

Level Meters in the

Tevatron

Duane Plant,Todd Johnson,Jim Volk,Andrey Chupyra.

Continuous relative elevation monitor.

A16-3&4 water level differnence

120.0

122.0

124.0

126.0

128.0

130.0

132.0

134.0

136.0

138.0

140.0

2/11/03 0:00 2/12/03 0:00 2/13/03 0:00 2/14/03 0:00 2/15/03 0:00 2/16/03 0:00 2/17/03 0:00 2/18/03 0:00

date

mic

rom

eter

s store 2213

Store 2229

Store 2231

Store 2232

A16-3 and A16-4 WLMJim Volk

Quench

E-Sector

A-Sector

B-Sector

Some recent history from Todd Johnson’s Tilt Meters.

Have the Tev magnet coils moved in the ensuing years?

We measure significant differences in roll betweenthe us and ds ends of many magnets. The alignment lugs were originally set to account for any magnet twist:

Both ends of the magnet should have the same roll.Twist may be induced by 4-point stands.

There are several things we can do:a. Measure smart bolt settings (will be done tomorrow on a select set of magnets in the tunnel).b. Use the Kaiser coil to check for magnet coil alignment.c. There are about 24 magnets in storage that could be put on a stand and checked.

Coupling in the Tevatron

Tev Magnet cross section

Quadrant 2 Cold Lift Differences

-0.015

-0.010

-0.005

0.000

0.005

0.010

0.015

0.020

1 2 3 4 5 6 7 8 9

Support Number

DIf

fere

nc

e (

in)

TC0527

TB0277

TB0299

TB0338

TB0328

TC0468

TB0365

TB0351

TB1122

TB0596

TC0488

TC0531

TB0862

TC1218

TC0816

TC1059

TC0788

TC1149

Dipole Smart Bolt Measurements

-0.020

-0.015

-0.010

-0.005

0.000

0.005

0.010

0.015

0.020

0.025

0.030

0.035

1 11 21 31 41 51 61 71 81 91 101

111

121

131

141

151

161

Magnet

Mil

s Quadrant 1

Quadrant 2

Smart Bolt Survey in Tevatron

Measurements taken on 2/1982 and 2/18/2003.

Dave Harding, John Carlson,Jamie Blowers,And many others.

Would induce oneUnit of a1.

Coupling Study @ 150 GeV

• Beam mis-steered in P1 line

• T:SQ global skew quad circuit at 0 amps

• Look at betatron oscillation coupling between horz & vert

• Below are ~ 4 turns of data; 1st turn on left; scale limits 4mm

Horizontal

Vertical

Ron Moore

This is where we need to get creative.

• We need to measure magnet positions often, at least once per year. To follow changes as they take place, we should monitor what

magnets are doing over time. Keep track of changes in corrector magnet currents. The tilt monitors give a measure of short term changes:

We need a cheap way to put 1,000 of these in the ring. Hans Jostlein has come up with a quick roll measuring device:

We hope to be able to do the entire ring in 2-3 days. In a similar vein, we’ll need some way to quickly

measure elevation. Horizontal position checks would be useful also.

How do we manage the baseline configuration?

Summary

• A BD is being developed for Tevatron magnets to include magnetic fields and alignment data.• We need to complete elevation measurements. A14-1 was a revelation.• A horizontal survey network is in the design stage.• A continuous position monitoring system is being developed.• What can we say about twist.• We may want to realign shims within the iron yoke magnets.