Experience with GRIFFIN - Fermilab · Compton Polarimetry using GRIFFIN 26 Jan 2018 FRIB decay...

Canada’s national laboratory for particle and nuclear physics and accelerator-based science

Experience with GRIFFIN Adam Garnsworthy ARIEL Principal Scientist and TRIUMF Research Scientist FRIB Decay Station Workshop 25-26th January 2018

N (neutrons)0 20 40 60 80 100 120 140

Z (p

roto

ns)

20

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1210

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Ta

TiNi

Nb

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Yield Chart of Nuclides

ISAC rare isotope facility

Isotopes delivered at ISAC (P.Kunz, Updated June 2016)

Target materials: SiC, TiC, NiO, Nb, ZrC, Ta, U Ion sources: Surface, FEBIAD, IG-LIS

TRIUMF-ISACIsotopeSeparatorandACcelerator

1 RIB delivery to experiments

SiC,NiO,Nb,ZrC,Ta,UCxTargetsSurface,FEBIAD,IG-LISionsources

500MeVp+at100μAonISOLtarget

N (neutrons)0 20 40 60 80 100 120 140

Z (p

roto

ns)

20

40

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1

10

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610

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Yield Chart of Nuclides

Cyclotron

ISAC

ISAC

ISAC-I Low-Energy <60keV Ground state + decay, material science ISAC-I Medium E <1.5MeV/u Astrophysics ISAC-II SC LINAC <10MeV/u Nuclear reactions and structure 26Jan2018 FRIBdecaystaPonworkshop

3

ARIEL Project: § newelectronlinacdriverforphoto-fission§  new target stations and front end § newprotonbeamline

TRIUMF-ARIELAdvancedRare-IsotopELaboratory

E-linacandelectronbeamlineSept.2014

1 RIB è 3 simultaneous RIBs

Cyclotron

ISAC

e-linac

ISACARIELIARIELII

26Jan2018 FRIBdecaystaPonworkshop 4

500MeV Protons on UCx

Photo-fission of UCx

Rare-isotopebeamswillbeproducedbyfromprotonand

electrondriverbeams.

ARIEL beams to ISAC experiments


ARIEL Completion to Science 1999 Low-energyISACbeams

10/2019 ISAC-CANREB-ISACbeams

03/2022 ARIELbeamtoβ-NMR

06/2022 ARIELphoto-fissionbeamstoISAC

03/2023 ARIELspallaPonbeamstoISAC

26 Jan 2018 FRIB decay station workshop 6

The 8π Spectrometer

PerformeddecayspectroscopyatTRIUMF-ISAC-Ifrom2000to2013

Researchersfrom24insPtuPonsfrom8countries.25post-docs,5PhD,12MSc,1MPhysSeveralGrad.StudentssPllinprogress26 Jan 2018 FRIB decay station workshop 7

The 8π Spectrometer at TRIUMF-ISAC

11Li beta-delayed neutron emission C.M. Mattoon et al., PRC 80, 034318 (2009) F. Sarazin et al., PRC 70, 031302 (2004)

High-statistics studies of Cd, Sn, Xe B. Jigmeddorj et al., Eur. Phys. J. A 52, 36 (2016). B.Jigmeddorj,et al., EPJWebConf.107,03014(2016). A.J. Radich et al., PRC 91, 044320 (2015) P.E. Garrett et al., PRC 86, 044304 (2012) P.E. Garrett et al., Acta Phys.Pol. B42, 799 (2011) P.E. Garrett et al., AIP Conf.Proc. 1377, 211 (2011) K.L. Green et al., PRC 80, 032502 (2009)

Island of inversion, 32Mg C.M. Mattoon et al., PRC 75, 017302 (2007)

Isomer decay in 174Tm, 178Hf, 179Lu R.S. Chakrawarthy et al., PRC 73, 024306 (2006) R.S. Chakrawarthy et al., EPJ. A 25, S1, 125 (2005) M.B. Smith et al., NPA746, 617c (2004) M.B. Smith et al., PRC 68, 031302 (2003)

Shape coexistence in neutron-rich Sr, Zr J. Park et al., PRC 93, 025802 (2016). A. Chakraborty et al., PRL 110, 022504 (2013)

Half Life of geochronometer, 176Lu G.F. Grinyer et al., PRC 67, 014302 (2003)

Technical and Overview Publications A.B.Garnsworthy, EPJ Web of Conf.s 93, 01032 (2015) P.E. Garrett et al., J. of Phys. Conf. Series 639, 012006 (2015). A.B. Garnsworthy and P.E. Garrett, Hyp. Int. 225, 121 (2014) G.C. Ball et al., J.Phys.:Conf.Ser. 387, 012014 (2012) D S Cross et al., JINST 6, P08008 (2011) P.E. Garrett et al., NIM Phys.Res. B261, 1084 (2007) G.C. Ball et al., J.Phys.(London) G31, S1491 (2005) S.J. Williams et al., J.Phys.(London) G31, S1979 (2005) C.E. Svensson et al., NIM Phys. Res. B204, 660 (2003)

Large Beta-Delayed neutron branching ratio observed from 102Rb Z.M.Wang et al., PRC 93, 054301 (2016).

Superallowed/Mirror Beta Decay 10C, 14O,18Ne, 19Ne, 26mAl, 38mK, 62Ga, 74Rb M.R.Dunlopetal,PRL.116,172501(2016).A.T. Laffoley et al., PRC 92, 025502 (2015) G.C. Ball, Hyp. Int 225, 133 (2014) R. Dunlop et al., PRC 88, 045501 (2013) G.F. Grinyer et al., PRC 87, 045502 (2013) A.T. Laffoley et al., PRC 88, 015501 (2013) P. Finlay et al., PRC 85, 055501 (2012) S. Triambak et al., PRL 109, 042301 (2012) P. Finlay et al, PRL 106, 032501 (2011) G.F. Grinyer et al., NIM A622, 236 (2010) P. Finlay et al., PRC 78, 025502 (2008) K.G. Leach et al., PRL 100, 192504 (2008) G.F. Grinyer et al., PRC 77, 015501 (2008) G.F. Grinyer et al., PRC 76, 025503 (2007) G.F. Grinyer et al., NIM A579, 1005 (2007) E.F. Zganyar et al., Acta Phys.Pol. B38, 1179 (2007) B. Hyland et al., PRL. 97, 102501 (2006) B. Hyland et al., AIP Conf.Proc. 819, 105 (2006) B. Hyland et al., J. Phys. G31, S1885 (2005) G.F. Grinyer et al., PRC 71, 044309 (2005) A. Piechaczek et al., PRC 67, 051305 (2003)

FRIB decay station workshop 8

GRIFFIN Timeline

StructureFabricaPonandProcurement Assembly InstallaPoninISAC

April2015Oct2012 Oct2014April2014April2013 Oct2013

8piOperaPon GRIFFINOperaPonGRIFFINInstallaPon

PrototypingandDevelopment FirmwareandDAQDevelopmentFabricaPonofProducPon

models

Receivefirst8Clovers Receiveanother4Clovers Acceptall16Clovers

ExperimentalHallPreparaPon InstallaPonofBeamlineandElectronicsShack

InstallaUonin2014,CommissioningrunsinFall2014,CompleUoninMay2015

PhaseTwo:SuppressionShields(CAD$3.57M).June2016–May2018

PhaseOne:Infrastructure+HPGe(CAD$8.7M).Oct2012–April2015

GRIFFIN Installation in 2014 Jan Feb Apr

May

July

FirstRIB24thSept2014

10 26 Jan 2018 FRIB decay station workshop

Dec2013,8pi

GRIFFIN Footprint

Supportstructure:5.2mx1.8m2.7mtallElectronicsShack:4.2mx2.1m3.2mtallTotalarea:9mx9m


GRIFFIN HPGe Clover Detectors

TesPngperformedatSFUDec2012 4AcceptedApril2013 8AcceptedJan2014 9AcceptedMay2014 13AcceptedOct2014 16Accepted6monthsaheadofschedule

AveragePerformanceofall64crystals(16clovers):EnergyresoluPon@121keV= 1.12(6)[email protected]=1.89(6)[email protected]= 41(1)%

1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3Energy Resolution at 1.3 MeV (keV)

37.0

38.0

39.0

40.0

41.0

42.0

43.0

44.0

45.0

Rel

ativ

e Ef

ficie

ncy

(%)

Average of all 64 Crystals

Minimum Acceptable Efficiency

Max

imum

Acc

epta

ble

Res

olut

ion

U.Rizwanetal.,NIMA820,126(2016).

Aclose-packedarrayof16large-volumeHPGeCloverdetectors,64crystals

GRIFFIN HPGe Clover Detectors

0

10

20

30

40

50

60

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olut

e Pho

tope

ak E

ffici

ency

(%)

Summed NeighboursClover DetectorsSingle Crystals8pi Spectrometer

0

20

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100

Phot

opea

k-to

-Tot

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atio

(%)

100 1000 10000γ-ray Energy (keV)

0

1

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4

Add

back

Fac

tor


0

20

40

60Ef

ficie

ncy

Ratio

, GRI

FFIN

/8pi

a) b)

c) d)

4096crystalpairsat52uniqueanglesforγ-γangularcorrelaPons

0

10

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60

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olut

e Pho

tope

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ffici

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(%)


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opea

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al R

atio

(%)


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back

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tor


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ienc

y Ra

tio, G

RIFF

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a) b)

c) d)0

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60

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olut

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otop

eak

Effic

ienc

y (%

)


0

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opea

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-Tot

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atio

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ddba

ck F

acto

r


0

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ienc

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atio

, GR

IFFI

N/8

pi

a) b)

c) d)


Low-Energy Thresholds

26Jan2018 FRIBdecaystaPonworkshop

Energy (keV)0 20 40 60 80 100 120 140

Co

un

ts p

er

0.2

4 k

eV

210

310

410

510

121 keVSm X rays

Ge X rays

Escape peak

SingleGRIFFINHPGewith152EusourceFWHM=1.072(1)keV@121keV

14

Gamma-Gamma Angular Correlation Analysis

J.K.Smith,A.C.MacLeanetal.Inprepara>onforNIMA(2018).Developmentofγ-γangularcorrelaPonanalysistechniqueswithGRIFFIN.•  Finitesizeandshapeofcrystalsmeans

theorePcaldistribuPonisamenuated.•  Obtain‘template’fromhigh-staPsPcs

GEANT4simulaPon•  Fittemplatetoexperimentaldata.

Ideally:•  Fitexperimentaldata•  PlugcoefficientsintosimpleequaPons•  Obtaincorrected‘true’coefficients

θcos 1− 0.5− 0 0.5 1

Resid

ual

0.1−

0

0.1(b)

Nor

mal

ized

cou

nts

0.5

1

1.5

(a)Filledcircles=DataDomed=TheoryDashed=GEANT4

0+-2+-0+(pureE2)in62Zn

Compton Polarimetry using GRIFFIN


DefinePolarizaPonplanefromγ-γcoincidencedetecPon.ThenexamineazimuthalscameringangletodetermineelectricormagnePcnatureoftheradiaPon.

DanSouthall,TRIUMFresearchstudent,2016

)° (ξAzimuthal Compton Scattering Angle 0 10 20 30 40 50 60 70 80 90

)ξAs

ymm

etry

A(

0.08−

0.06−

0.04−

0.02−

00.020.040.060.08

(a)


)ξAs

ymm

etry

A(

0.08−

0.06−

0.04−

0.02−

00.020.040.060.08

(b)

207Bi567keVE2

207Bi1064keVM4

Compton Polarimetry using GRIFFIN


DefinePolarizaPonplanefromγ-γcoincidencedetecPon.ThenexamineazimuthalscameringangletodetermineelectricormagnePcnatureoftheradiaPon.

DanSouthall,TRIUMFresearchstudent,2016


)ξAs

ymm

etry

A(

0.08−

0.06−

0.04−

0.02−

00.020.040.060.08

(a)


)ξAs

ymm

etry

A(

0.08−

0.06−

0.04−

0.02−

00.020.040.060.08

(b)

207Bi567keVE2

207Bi1064keVM4

GRIFFIN Compton and Background Suppression Shields

18

GRIFFINHPGeBGOSet1atSFU

GRIFFINancillary-detectorBGOshield#1

•  FirstSuppressionshieldsetshavebeenaccepted(March2017)!•  AllperformanceacceptancetesPngcompletedatSFU

(KennethWhitmore,KevinOrtner,CorinaAndreoiu)•  MechanicalcheckscompletedatTRIUMF.

•  HPGe5setsaccepted.AllsetsexpectedbyMay2018.•  Ancil.Det.setsexpectedbyApril2018.

26 Jan 2018 FRIB decay station workshop

GRIFFIN Compton and Background Suppression Shields

19 26 Jan 2018 FRIB decay station workshop

LaBr3shield

HPGeat11cm HPGeat14.5cm

SCEPTAR - SCintillating Electron-Positron Tagging ARray


Energy (keV)1500 2000 2500 3000 3500 4000 4500

Cou

nts

/ keV

0

5000

10000

15000

HPGe

Beta-gated HPGe

132Inè132SnS1519,July2016

•  Twohemispheresof10plasPcscinPllators

•  DetectsbetaparPcleswith~80%solidanglecoverage

•  Improvespeak-to-backgroundofHPGespectra

•  Reducesrandombackgroundby~5ordersofmagnitude

20

PACES - Pentagonal Array for Conversion Electron Spectroscopy


Five5mmthick,200mm2Si(Li),LN2-cooledSidiodeandFETSolidanglecoverage:1.4%each,7%total~2keVresoluPonforelectrons

J.Parketal.,PRC96,014315(2016).

Alpha-tagging

21

Gamma-Electron Angular correlations

0

175

544

3-

7+

2-198mTl

175keVM1ICE

283keVM4Gamma

300Ge-Si(Li)pairsat18uniqueanglesforγ-e-angularcorrelaPons


LaBr3 Fast-Scintillator Array for Excited-State Lifetime Measurements


•  EightLaBr3(Ce)2”x2”cylindricalcrystal

•  Source-detectordistance=12.5cm.

•  GEANT4simulatedefficiency1.4%@1.3MeV

•  Hybridanalogue+digitalelectronics,excellentPmeresoluPon

•  EffortledbyBrunoOlaizola

T1/2for2+1statein146BaGRIFFIN:840(20)psLiterature:860(30)ps

Preliminary

146Csβdecay:GRIFFIN+DESCANT+LaBr3August2016

23

GRIFFIN+DESCANT


•  70elementarrayofdeuteratedscinPllatorforneutrondetecPon•  Enablesbeta-gamma-ICE-neutronspectroscopy•  ~1πsolidangle•  NeutronenergyfromPme-of-flight(50cmflightpath)•  Onlineneutron-gammadiscriminaPonfrompulseshape

GRIFFIN+DESCANT,August2016

24

GRIFFIN Ancillary Detectors

Fast, in-vacuum tape system Enhances decay of interest

SCEPTAR: 10+10 plastic scintillators

Detects beta decays and determines branching ratios

Zero-Degree Fast scintillator Fast-timing signal for betas

PACES: 5 Cooled Si(Li)s Detects Internal Conversion Electrons and alphas/protons

HPGe: 16 Clovers Detect gamma rays and

determines branching ratios, multipolarities and mixing ratios

LaBr3: 8 LaBr3 Fast-timing of photons to measure level lifetimes

JπGS

JπISOMER

ISOBAR

T1/2

T1/2 Longer T1/2 Shorter

E,Jπ τ E,Jπ τ

γ γ e-

α,p

β

β

γ e-

γ γ γ

β

n

DESCANT Neutron array Detects neutrons to measure beta-delayed neutron branching ratios

β

β

GRIFFINreusesthefullsuiteofancillary

detectorsdevelopedforthe8πspectrometer


GRIFFIN DAQ System


CustomDigitalElectronicsModulesdesignedandbuiltbyTRIUMFandUniversitédeMontréal

Highdatathrough-put:Eachcrystalrunningat50kHz

300MB/soffiltereddata,1TBperhour≈5x109gamma-gammacoincidences/hour…toenableultra-high-sta>s>csstudies

Highaccountability:AccuratedeadPmeknowledge

Pile-uphandlingEventtraceabilityfromthresholdcrossingtodisk

…toenablehigh-precisionhalf-life/BRmeasurements

26

GRIFFIN DAQ System


CustomDigitalElectronicsModulesdesignedandbuiltbyTRIUMFandUniversitédeMontréal

MasterandCollectorModule

• 625MB/slinktoeachdigiPzer

• 1.25Gb/slinktodatastorage.

GRIF-16Module

GRIF-4GModule

ClockDistribuUonModule

10MHzAtomicClockLow-jimerfan-outtoallmodules

ProgrammableLogicPulseGenerator

32ChannelsNIMorTTL

4chans1GHz,12bit

16chans100MHz,14bit

27

Excellent Energy Resolution with GRIFFIN Digital DAQ


s)µIntegration Length (0 2 4 6 8 10

FW

HM

(ke

V)

1.7

1.8

1.9

2.0

2.1

2.2

2.3

2.4

2.5

2.6SingleGRIFFINHPGewith60Co,~0.3kHz

FWHM=1.87(1)keV@1332keV

0.195%0.188%0.180%0.173%0.165%0.158%0.150%0.143%0.135%0.128%

28

High counting rates


Count rate (kHz)

0 20 40 60 80

Ener

gy R

esol

utio

n (k

eV)

2

3

4

5(a)

Count rate (kHz)

10 20 30 40 50

Coi

ncid

ent T

imin

g R

esol

utio

n (n

s)

20

30

40

50

60

70

80

(b)

Count rate (kHz)

10 20 30 40 50

Peak

-to-to

tal r

atio

0.10

0.11

0.12

0.13

0.14

0.15

0.16

(c)

all interactions

no pile-up

Energy (keV)

0 500 1000 1500 2000 2500 3000

Nor

mal

ised

cou

nts

1

10

210

310

410

510

(a)

1.1 kHz

62.4 kHz

Energy (keV)

0 500 1000 1500 2000 2500 3000

Nor

mal

ised

cou

nts

1

10

210

310

410

510

(b)

1.1 kHz

62.4 kHz

“Pile-upreject”

Allhits

Count rate (kHz)10 15 20 25 30 35 40 45 50

Rel

ativ

e Ef

ficie

ncy

0.4

0.5

0.6

0.7

0.8

0.9

1.0

all interactions

no pile-up

The GRIFFIN Spectrometer for precision decay studies at ISAC

31,32Na:Islandofinversion

115,115mAg:Equilibriumof115,115mCdduringthes-process

TechnicalandOverviewPublicaPonsA.B.Garnsworthyetal.,NIMA853,85(2017).U.Rizwanetal.,NIMA820,126(2016).A.B.Garnsworthy,ActaPhys.Pol.B,47,713(2016).C.E.SvenssonandA.B.Garnsworthy,Hyp.Int.225,127(2014).

46,47K:Single-parPcleandpairstatesneardoubly-magic48Ca

CalibraPonsanddevelopmentwith

26Nabeams

GRIFFINisapowerfuldecayspectrometerfornuclearstructure,astrophysicsand

fundamentalinteracPonstudies.CommissionedFall2014.

2014

2014

2014

26 Jan 2018 30


31,32Na,33,34,35Mg:Islandofinversion



46,47K:Single-parPcleandpairstatesneardoubly-magic48Ca

128,129,130,131,132Cd:Nuclearstructureandr-processnucleosynthesisattheN=82shellclosureR.Dunlopetal.,PRC93,062801(R)(2016).


26Nabeams



2014

2014,2015

2014

2015

26 Jan 2018 31





46,47K,50Ca:Single-parPcleandpairstatesneardoubly-magic48CaA.B.Garnsworthyetal.,PRC96,044329(2017).

128,129,130,131,132Cd,129,130,131,132,133In:Nuclearstructureandr-processnucleosynthesisattheN=82shellclosureR.Dunlopetal.,PRC93,062801(R)(2016).

22Mg,62Ga:SuperallowedFermibetadecaysM.R.Dunlopetal.,PRC96,045502(2017).

145,146Cs:β-delayneutronmeasurementswithDESCANT,fast-PmingwithLaBr3


9Li,26Na,66Gabeams



2016

2014,2016

2014,2015

20142016

2015,2016

26 Jan 2018 32





46,47K,50Ca:Single-parPcleandpairstatesneardoubly-magic48CaA.B.Garnsworthyetal.,PRC96,044329(2017).

128,129,130,131,132Cd,129,130,131,132,133In:Nuclearstructureandr-processnucleosynthesisattheN=82shellclosureR.Dunlopetal.,PRC93,062801(R)(2016).

22Mg,62Ga:SuperallowedFermibetadecaysM.R.Dunlopetal.,PRC96,045502(2017).

145,146Cs:β-delayneutronmeasurementswithDESCANT,fast-PmingwithLaBr3


9Li,26Na,66Gabeams

228,230Fr:ProbingOctupoledeformaPonandcollecPvityinRadiumisotopes.

72Ga:Triaxialityandshapecoexistence

188-200Tl:DevelopmentofcollecPvityinHgisotopes



20172017

2017

2016

2014,2016

2014,2015

20142016

2015,2016

26 Jan 2018 33

GRIFFIN studies around doubly-magic 48Ca

50Ca-50Sc,Nov2016,1x106pps,~2hrs“Spectroscopyof50ScandthefirstcalculaPonofB(M3)strengthsusingabini>omethods”,A.B.Garnsworthy,Phys.Rev.C96,044329(2017).

50Sc-50Ti,Nov2016,1x106pps,~5hrs“SearchforparPcle-holeexcitaPonsacrosstheN=28shellclosure”,C.Jones,Mastersthesis(Jan2018),inpreparaPonforPhys.Rev.C(2018).

46K–46Ca,Dec2014,4x105pps,~40hrs“Detailedspectroscopyof46Ca:TheinvesPgaPonoftheβdecayof46KwiththeGRIFFINγ-rayspectrometer”,J.L.Pore,PhDthesis(2017),inpreparaPonforPhys.Rev.C(2018).

47K–47Ca,Dec2014,1x105pps,~90hrs“Detaileddecayspectroscopyof47Ca”,J.K.Smith,inpreparaPonforPhys.Rev.C(2018).

TwobeamUmeperiodswithGRIFFIN~5.5days•  1publicaUon,3inpreparaUon•  1PhDthesis,1Mastersthesis


1345

1227511774646

1674 2262

2200000

1400000

600000

PreviouslyReportedLevelScheme~36hoursofbeamPmetakeninDec2014

JenniferPore,CorinaAndreoiu,SFU

46Kto46CaBeta-DecayG-GCoincidences

46K to 46Ca Beta-Decay 46Kbeamof4x105ppsfor~40hrs~200gamma-raytransiPonsnewlyplaced.14previouslyunobservedexcitedstates(45totalobserved).

•  States observed to within 815keV of the 7.7MeV Q value. •  Branching ratios observed down to 10-3. •  Weakest γ-ray observed has intensity of 0.0015% that of the 21

+ to 01+ transition.

•  Compton-Suppression shields would have allowed observation of even weaker transitions.

•  PhD thesis of J. Pore, Simon Fraser University. •  In preparation for PRC.


GRIFFIN Results: Spectroscopy of 50Sc and ab initio calculations of B(M3) strengths

FirstcalculaPonofB(M3)strengthsusingabini>oValence-SpaceIn-MediumSimilarityRenormalizaPonGroupmethodandeffecPveoperator.

Gamma-gammaangularcorrelaPonswithGRIFFINconfirmM3isomerin50Sc.

γγ(θ):1519-71keV(1+-3+-2+)

A.B.Garnsworthy,M.Bowry,B.Olaizola,J.D.Holt,S.R.Strobergetal.,PRC96,44329(2017).

M3


Ultra-high statistics beta-decay spectroscopy of 72Ga-72Ge

T1/2=14hours.Datacollectedfor~12halflives.ThetwoGRIFFINandPACESspectrabeloweachrepresent10GBoutofatotalof8,000GB=0.125%!

A.B.Garnsworthy,J.Henderson,J.Smallcombe,J.K.Smith,M.Bowry,etal.,BeamPmeOct2017

Si(Li)HPGe

HighRate,~3MBq,~84μCi,80MB/stotalDAQrate16kHzSi(Li),24kHzHPGeperchannel

Si(Li)HPGe

LowRate,~25kBq,~0.7μCi,~2MB/stotalDAQrate0.5kHzSi(Li),0.2kHzHPGeperchannel


Thank you to Collaborators

30 June 2016 NUSPIN 2016 39

FRIB decay station workshop 39 26 Jan 2018

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Experience with GRIFFIN - Fermilab · Compton Polarimetry using GRIFFIN 26 Jan 2018 FRIB decay...

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