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BE BE Ge pr Ge pr oje c t oje c t Re sults from de te c tor ope ra tions Re sults from de te c tor ope ra tions a nd outlook a nd outlook a nd outlook a nd outlook MPI fr Ke rnphysik He ide lbe rg MPI fr Ke rnphysik He ide

slide-1
SLIDE 1

BE Ge pr

  • je c t

BE Ge pr

  • je c t

Re sults from de te c tor ope ra tions Re sults from de te c tor ope ra tions a nd outlook a nd outlook a nd outlook a nd outlook

MPI für Ke rnphysik • He ide lbe rg MPI für Ke rnphysik • He ide lbe rg L NGS • Gra n Sa sso L NGS • Gra n Sa sso

MAX

AX PLANCK LANCK INSTITUT NSTITUT

MAX

AX-PLANCK LANCK-INSTITUT NSTITUT FÜR FÜR KERNPHYSIK ERNPHYSIK

1 1 BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 1.

  • 1. BE

Ge in L Ar te st re sults BE Ge in L Ar te st re sults

  • 2. Co nstra ints o n fro nt
  • 2. Co nstra ints o n fro nt-
  • e nd b a ndwidth

e nd b a ndwidth

Ma rik Ba rna b Ma rik Ba rna bé He ide r é He ide r • Duša n Budjá š • Ste fa n Sc höne rt

  • Duša n Budjá š • Ste fa n Sc höne rt

j

3.

  • 3. Upc o ming c ha ra c te risa tio n o f

Upc o ming c ha ra c te risa tio n o f de p

de pGe BE

Ge de te c to rs Ge BE Ge de te c to rs

á Ma tte o Ag ostini • E nric o Be llotti • Duša n Budjá š • Ca rla Ca tta dori • Ma tte o Ag ostini • E nric o Be llotti • Duša n Budjá š • Ca rla Ca tta dori • Ale xa nde r He g a i • Ale xa nde r He g a i • Ste fa n Sc höne rt • Mic ha l T a rka • Assunta di Va c ri Ste fa n Sc höne rt • Mic ha l T a rka • Assunta di Va c ri

slide-2
SLIDE 2

Duša n Budjá š Duša n Budjá š Duša n Budjá š

1 BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 1. 1. BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 2. 2. Constra ints on front Constra ints on front-

  • e nd ba ndwidth

e nd ba ndwidth 3. 3. Upc oming c ha ra c te risa tion of Upc oming c ha ra c te risa tion of

de p de pGe BE

Ge de te c tors Ge BE Ge de te c tors

pGe BE

Ge de te c tors Ge BE Ge de te c tors

2

slide-3
SLIDE 3

BE Ge in L Ar: GDL te st be nc h BE Ge in L Ar: GDL te st be nc h

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r

60 c m

  • 1st sta g e pre a mp

fro m HdM (in Ar g a s in de wa r ne c k) g a s in de wa r ne c k)

  • wa rm 2nd sta g e
  • 30 ns rise time

3

slide-4
SLIDE 4

BE Ge in L Ar: BE Ge in L Ar: short te rm te st 12. 2009 short te rm te st 12. 2009

G l

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r

  • Go a ls:
  • wo rking in L

Ar?

  • HV sc a n
  • 1st c o o ling :

hig h L C, so me visib le sig na ls, hig h L C, so me visib le sig na ls, b ut no spe c trum

 c ure : 3 × me tha no l b a th

  • 2nd c o o ling :

L C50 pA F WHM 1.8 ke V 4

slide-5
SLIDE 5

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg

BE Ge in L Ar: BE Ge in L Ar: short te rm te st 12. 2009 short te rm te st 12. 2009

Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r de ple tio n vo lta g e :

3.5 kV (1332 5 k V li )

de ple tio n vo lta g e :

(1332.5 keV line)

de ple tio n vo lta g e :

3.5 kV

5

slide-6
SLIDE 6

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r

BE Ge in L Ar: BE Ge in L Ar: long te rm te st 2. 2010 long te rm te st 2. 2010

Fit: y = a · x + b a = (-0 5 ± 2 5)·10-3 a ( 0.5 ± 2.5) 10 b = 5.14 ± 0.04

6

  • pe ra ting vo lta g e : 4.5 kV
slide-7
SLIDE 7

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg

BE Ge in L Ar: ove ra ll syste m sta bility BE Ge in L Ar: ove ra ll syste m sta bility

Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r b a c kg ro und b a c kg ro und

7

4 da y 60Co

slide-8
SLIDE 8

BE Ge in L Ar: pulse BE Ge in L Ar: pulse -

  • sha pe disc rimina tion re sults

sha pe disc rimina tion re sults

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

3500 3500

DEP

228T

h

2000 2500 3000

DE P a c c e pta nc e fixe d a t 90%

2000 2500 3000

nts

DEP 1621 keV

T h

40% 45% 50% 1000 1500 2000

a t

1000 1500 2000

Coun

25% 30% 35% al fraction

2103.5 keV 2614.5 keV 2039k V

500 1570 1580 1590 1600 1610 1620 1630 1640

m c ryo sta st in L Ar

500 1570 1580 1590 1600 1610 1620 1630 1640

2039 keV 2614.5 keV 21035keV

10% 15% 20% Surviva

2039 keV

Va c c uum 1st te s lo ng -te rm te st in L Ar

Energy [keV]

2103.5 keV

0% 5% 25.7 28.7 17.12 3.2 8.2 13.2 18.2 23.2 28.2

8

D ate

E rro r b a rs inc lude syste ma tic unc e rta inty o f PSD c a lib ra tio n

slide-9
SLIDE 9

Duša n Budjá š Duša n Budjá š Duša n Budjá š

1 BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 1. 1. BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 2. 2. Constra ints on front Constra ints on front-

  • e nd ba ndwidth

e nd ba ndwidth 3. 3. Upc oming c ha ra c te risa tion of Upc oming c ha ra c te risa tion of

de p de pGe BE

Ge de te c tors Ge BE Ge de te c tors

pGe BE

Ge de te c tors Ge BE Ge de te c tors

9

slide-10
SLIDE 10

BE Ge PSA c onstra ints on front BE Ge PSA c onstra ints on front-

  • e nd ba ndwidth

e nd ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

  • te st o f PSD pe rfo rma nc e in de pe nde nc e o n sig na l b a ndwidth
  • using re c o rde d e xpe rime nta l pulse -da ta
  • using re c o rde d e xpe rime nta l pulse -da ta
  • ste p 1: F

E b a ndwidth re stric tio n simula te d b y va rio us filte r me tho ds

FADC d t ( l i l) ft di it l filt i

3000 4000 5000 ignal 3000 4000 5000

raw FADC data (pulser signal) after digital filtering

1000 2000 3000 Voltage s 1000 2000 3000

24 ns 40 ns – 500 ns

2400 2420 2440 2460 2480 2500 t [10 ns] 1500 2000 nal 2400 2420 2440 2460 2480 2500 t [10 ns] 1500 2000 500 1000 Current sig 500 1000

10

2400 2420 2440 2460 2480 2500 t [10 ns] 2400 2420 2440 2460 2480 2500 t [10 ns]

slide-11
SLIDE 11

BE Ge PSA c onstra ints on F E ba ndwidth BE Ge PSA c onstra ints on F E ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

  • ste p 2: PSD o n filte re d pulse s (DE

P a c c e pta nc e a lwa ys fixe d a t 90%)

FEP 1621 keV

35% 40%

m

  • ing a erage

CC 1570 keV 65% 68%

228T

h

228T

h

20% 25% 30% bability

m

  • ving average

local regression 12dB drop 24dB drop 8% 60% 63%

  • bability

m

  • ving average

local regression 12dB drop 24dB drop

5% 10% 15% survival prob

53% 55% 58% survival pro 24dB drop

0% 100 200 300 400 500 Rise time [ns]

50% 100 200 300 400 500 Rise tim e [ns]

60Co sum

m ation region 1570 keV 4% 5% 6% 7% m

  • ving average

local regression

 po ssib ility fo r impro ve d

PSD re je c tio n with

  • ptimise d sha ping

1% 2% 3% 4% local regression 12dB drop 24dB drop

11

0% 100 200 300 400 500 Rise tim e [ns]

slide-12
SLIDE 12

Duša n Budjá š Duša n Budjá š Duša n Budjá š

1 BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 1. 1. BE Ge in L Ar te st re sults BE Ge in L Ar te st re sults 2. 2. Constra ints on front Constra ints on front-

  • e nd ba ndwidth

e nd ba ndwidth 3. 3. Upc oming c ha ra c te risa tion of Upc oming c ha ra c te risa tion of

de p de pGe BE

Ge de te c tors Ge BE Ge de te c tors

pGe BE

Ge de te c tors Ge BE Ge de te c tors

12

slide-13
SLIDE 13

Cha ra c te risa tion of Cha ra c te risa tion of de p

de pGe BE

Ge de te c tors Ge BE Ge de te c tors

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

Co o rdina to rs: Duša n, Assunta

  • Pa rtic ipa nts fro m se ve ra l GE

RDA institute s

  • Goa l: c ha ra c te rise spe c tro sc o pic , c ha rg e c o lle c tio n a nd PSD

pe rfo rma nc e o f the ne w BE Ge de te c to rs

  • Work pla n:
  • hig h-vo lta g e sc a nning
  • e ne rg y re so lutio n me a sure me nts
  • de a d-la ye r a nd a c tive vo lume de te rmina tio n

y

  • PSD pe rfo rma nc e te sts
  • sta b ility me a sure me nt
  • Pla c e : L

NGS, la b o ra to ry a t Auto rime ssa 2 (a b o ve g ro und)

  • F

irst de te c tor a rriva l: in the ne xt da ys

13

slide-14
SLIDE 14

Cha ra c te risa tion of Cha ra c te risa tion of de p

de pGe BE

Ge de te c tors Ge BE Ge de te c tors

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

  • Sc he dule :

under review (permanently...)

14

slide-15
SLIDE 15

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

Summa ry a nd c onc lusions Summa ry a nd c onc lusions

  • BE

Ge de te c to r suc c e sfully o pe ra te d in L Ar: 1.8 ke V F WHM, sta b le o pe ra tio n, PSD pe rfo rma nc e sa me a s in va c . c ryo sta t

  • PSD re q uire me nts o n fro nt-e nd b a ndwidth no t

ve ry de ma nding : ~100 ns rise time suffic ie nt f i i f

  • Re a dy fo r a c c e pta nc e te sting c a mpa ig n o f

the ne w de pGe BE Ge de te c to rs, h i i f h

t d

i c ha ra c te risa tio n o f the 1st de te c to r sta rting a fte r the me e ting

15

slide-16
SLIDE 16

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

Backup slides Backup slides

16

slide-17
SLIDE 17

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg

BE Ge in L Ar: BE Ge in L Ar: short te rm te st 12. 2009 short te rm te st 12. 2009

Ma rik Ba rna b Ma rik Ba rna b Ma rik Ba rna b é é He ide r He ide r He ide r

17

slide-18
SLIDE 18

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

BE Ge in L Ar: BE Ge in L Ar: short te rm te st 12. 2009 short te rm te st 12. 2009

Region LAr/GDL Vacuum/Hd DEP 0.90  0.02 0.90  0.02 1621 keV 0.12  0.02 0.11  0.01 SEP 0.07  0.01 0.06  0.01 2614 keV 0.102  0.001 0.095  0.001 Q 0.42  0.03 0.42  0.02

18

slide-19
SLIDE 19

BE Ge PSA c onstra ints on F E ba ndwidth BE Ge PSA c onstra ints on F E ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

moving-average smoothing smoothing span [points]: 5, 7, 9, 13, 17 ... plitude amp t [ns]

slide-20
SLIDE 20

BE Ge PSA c onstra ints on F E ba ndwidth BE Ge PSA c onstra ints on F E ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

smoothing via local regression using weigthed least squares smoothing span [points]: 9, 11, 13, 15, 17, 19, 21, 23, ... plitude amp t [ns]

slide-21
SLIDE 21

BE Ge PSA c onstra ints on F E ba ndwidth BE Ge PSA c onstra ints on F E ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

IIR Butterworth filter, 12 dB drop pass-band frequency [MHz]: 8 7 6 5 4 3 2 1 0.5 mplitude a t [10 ns] t [10 ns]

slide-22
SLIDE 22

BE Ge PSA c onstra ints on F E ba ndwidth BE Ge PSA c onstra ints on F E ba ndwidth

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

IIR Butterworth filter, 24 dB drop pass-band frequency [MHz]: 8 7 6 5 4 3 2 1 mplitude a t [10 ns] t [10 ns]

slide-23
SLIDE 23

MPI K He ide lb e rg MPI K He ide lb e rg MPI K He ide lb e rg Duša n Budjá š Duša n Budjá š Duša n Budjá š

Cha ra c te risa tion of Cha ra c te risa tion of de p

de pGe BE

Ge de te c tors Ge BE Ge de te c tors

Me a sure me nts list 23