Readout scheme for the Baby- MIND detector E. Noah 1, A. Blondel 1, Y. Favre 1, Y. Kudenko 2, O....
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Transcript of Readout scheme for the Baby- MIND detector E. Noah 1, A. Blondel 1, Y. Favre 1, Y. Kudenko 2, O....
Readout scheme for the Baby-MIND detector
E. Noah1, A. Blondel1, Y. Favre1, Y. Kudenko2, O. Mineev2, R. Tsenov2
1University of Geneva, Switzerland2INR, Russia
PD15: Moscow: Troitsk: 6-9 July 2015
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Outline
• The Baby-MIND detector• Detector module characteristics• Choice of photosensors• Module light yield with CITIROC• Baby MIND Front End Board
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• Muon spectrometer consisting of magnetized plates of iron interleaved with plastic scintillator detector modules.
• Modularity in magnetization design simplifies proposed use at various facililities, downstream of:– WAGASCI at J-PARC (2016 onwards) : anti-nu selection
efficiencies > 90%.– LAr (WA105) (2017 onwards): Use of MIND detectors
integrated from start of studies or Long Baseline experiments in Europe (LBNO): muon charge ID and momentum, tail catching of hadronic showers. Baby MIND could provide partial acceptance for events in 6×6×6m3 of WA105 LAr.
The Baby-MIND detector
WAGASCI @ J-PARC
WA105 @ EHN1 extension
Baby-MIND positioned here
Side MRDs
Wagasci
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Optical readout of plastic scintillator planes
PMT-based: MICE-EMR installed at RAL Sep. 2013
SiPM-based: AIDA Baby MIND
PMT
SiPM
Implemented for several thousand channels first at T2K ND280
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Detector modules
Plastic scintillator bars:• Extruded scintillator slabs produced at Uniplast
company, Vladimir, RU:• polysterene-based, 1.5% paraterphenyl (PTP) and 0.01%
POPOP.• Slabs etched with chemical agent (Uniplast) to create a
30-100 mm layer that acts as a diffusive layer
• Custom optical connectors (INR design for AIDA)• Kuraray Y11 WLS fiber in 2mm deep groove• Dimensions: 900 x 10 x 7 mm3
Module characteristics :• 2 planes, X/Y
• Each plane: 84 plastic scintillator bars
• 1st prototype Nov. 2014
Poster: The design, construction and testing of TASD: A. Mefodiev et al.
Photosensor connector: INR design
Optical cement light transmission WLS fiber: St. Gobain & Kuraray Y11 Light yield measured for > 9000 bars
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Dark cnts [kHz]thres.: 0.5 p.e.
Photosensors
Options tested:• MPPC/ASD40/KETEK/SensL• Several MPPC variants
Selection:• Hamamatsu MPPC S12571-025C• 1 × 1 mm2 • 25 mm cell size• 3000 delivered by 6 Mar. 2015
Vop [V]25oC
WLS fiber and MPPC alignment
MPPC test data by Hamamatsu
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Calibration & digitization
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3
4
SiPM
① Scintillation ② Light trapping efficiency in WLS fiber③ Light attenuation in WLS fiber④ Optical connector insertion loss⑤ SiPM response⑥ Electronics response
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Lab.
Beamline
Individual bar characterization: n bars
Module QA: n/m bars
Cosmic m, radiosource
Cosmic ?m m,p,e,p
Charged particle
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ch0
ch7
ch8
ch15
ch16
ch23
ch24ch27
ch28ch31
Bar light yield test: post module assembly
Setup in dark room
Channel configuration: channels under test ch0-15
25oC
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ADC[12-bit]
FPGA
Delay
MPPCx32
PlasticScint. barsx32
LabVIEW
usb
Module characterisation with CITIROC evaluation board
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12.5 ns 25 ns 37.5 ns 50 nsCITIROC shaper time constant
62.5 ns 75 ns 87.5 ns10
ns
20 n
s30
ns
40 n
s50
ns
60 n
sO
R32/
Hol
d de
lay
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Feedback capa.= 1 [arb.]48.2 ADC/p.e.
Feedback capa. = 6 [arb.] 25.6 ADC/p.e.
Feedback capa. = 4 [arb.] 32.2 ADC/p.e.
Feedback capa. = 8 [arb.]19.3 ADC/p.e.
• Regime:– high enough gain to
resolve indivual p.e. peaks whilst avoiding saturation
• Dynamic range (HG):– 12-bit ADC– Baseline ~950– 19.3 ADC/p.e.– 160 p.e.
• > 1600 p.e. with LG.
Varying Pre-amp Feedback capacitance
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Light yield: sum of both ends of bar
Bar pos.[#]
Bar ID[#]
Bar INR[p.e.]
Module[p.e.]
1 6421 124.4 145.2
2 6411 125.4 155.4
3 6422 119.0 138.7
4 6410 134.6 153.6
5 6414 112.9 142.5
6 6409 118.6 136.6
7 6412 129.4 146.2
8 6413 119.0 183
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ch0
ch7
ch8
ch15
ch16
ch23
ch24ch27
ch28ch31
“Optical” crosstalk: light yield in adjacent bars
ab
cd
L.y. cuts:Ch3>70p.e.Ch11>70p.e.Ch19>70p.e.
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Baby MIND FEB
FEB characteristics :• 96 SiPM channels (mini coax. connectors), 84 used for Baby MIND• 3 CITIROC ASICs (32 ch charge ampl., trigs, ext. common HV + independent 0/4V)• 12-bits 8-ch ADC 40Ms/s/ch• 2 x 6Gb/s transceiver (800Mb/s for Baby MIND)• USB3.0 (5Gb/s) µC for lab, calib. & maintenance• LV & HV power supplies• Altera ARIA 5 FPGA (mid-range), firmware :
• 84 ch. Timing meas (2/2.5ns resolution)• Charge meas. (from 12-bits ADC)• Baseline computation (filtering)• USB3.0 gateway• Gigabit protocol for readout (exp.)
• PCB: • 8 layers • 120µm space/width lines• Impedance & length control (TDC)
• Schedule:• First prototype FEB 11 March 2015• Firmware development ongoing• ~ 30 Baby MIND FEBs Dec. 2015
Baby MIND FEB (Photo by Y. Favre 12 March 2015)
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• Baby MIND spectrometer modules:– all 9400 bars measured for light yield at INR before assembly into
modules at UniGe– choice of photosensor made, 3000 MPPC S12571-025C delivered by
March 2015 with good QA data– Test procedure for module characterization
• Electronics:
– CITIROC tested with evaluation board from Omega Microelectronics (8-bit DAC for Vop, Pre-amp gain, shaper, discriminator, Or32 Mask)
– FEB produced (3 CITIROC/FEB)– Firmware architecture done (documented)– Firmware implementation ongoing
Summary
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thanks toF. Cadoux, M. Dementjoz, S. Fedotov, A. Khotyantsev, A. Kleimenova, A. Mefodiev, L. Nicola, T. Ovsiannikova, N. Yershov...
... to you for your attention
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Tests of 1 x 1 mm2 MPPC at INR
“New” MPPC 50mm cell size same optical cross-talk and afterpulsing for both, sensitive area difference:• 1x1 mm2 = 16.4 p.e.• 1.3x1.3 mm2 = 17.2 p.e.