Scintillation Tile Hodoscope for the PANDA Barrel Time-Of-Flight - - PowerPoint PPT Presentation

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Scintillation Tile Hodoscope for the PANDA Barrel Time-Of-Flight - - PowerPoint PPT Presentation

Aug 29, 2023 490 likes •911 views

Scintillation Tile Hodoscope for the PANDA Barrel Time-Of-Flight Detector William Nalti, Ken Suzuki, Stefan-Meyer-Institut, AW on behalf of the PANDA/Barrel-TOF(SciTil) group 12.06.2018, ICASiPM2018 1 Outline Introduction: PANDA &

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SLIDE 1

Scintillation Tile Hodoscope for the PANDA Barrel Time-Of-Flight Detector

William Nalti, Ken Suzuki, Stefan-Meyer-Institut, ÖAW

  • n behalf of the PANDA/Barrel-TOF(SciTil) group

12.06.2018, ICASiPM2018

1

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SLIDE 2

Outline

  • Introduction: PANDA & FAIR
  • Barrel TOF Design
  • Single Tile Performance
  • Larger Scale Integration

Tomorrow 11.45: Application of SiPMs and MCP-PMTs in the PANDA PID detectors - Albert Lehmann (Erlangen University)

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SLIDE 3

PANDA Experiment at FAIR

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MVD<STT<B-DIRC<B-TOF<EMC

Installation planned end-2021, with physics starting 2025

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SLIDE 4

Scintillator Tile

Barrel Time-of-Flight (TOF) Design

16 Super modules

240 ch. /SM

  • max. 40 kHz /ch.

Covers 22.5° < θ < 140°

2.46m long, 1m diameter

180x18 cm2 scintillators (120x) area 2 ch./scint. rest is left for FEE

Total: 1920 tiles, 3840 channels, 15360 SiPMs

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SLIDE 5

Capabilities and Requirements

  • Collision time determination
  • event sorting
  • 20 MHz interaction rate
  • particle identification (PID)

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Requirement: σt<100 ps to keep the efficiency loss due to event mixing in a tolerable level

“hits” in detector collisions

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SLIDE 6

Single Tile Design

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SLIDE 7

Dual Module

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double-sided single-sided MMCX connector

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SLIDE 8

Performance - single tile

  • Optimization of time-resolution

in terms of material, wrapping, threshold, overvoltage

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Very fine position dependence measurement

  • f the performance with the optimised

condition with well collimated 90Sr source

In collaboration with Erlangen

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SLIDE 9

Performance - single tile

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HV 240V, threshold -30 mV, 2000 events/position, 3069 positions Mean time resolution σ = 53.9 ps

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SLIDE 10

Performance – single Tile

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Side view of the Sensorboard

scintillator (28.5x5 mm2) SiPM (3x3 mm2) Surface coverage = 1/4 LED Temperature sensor

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SLIDE 11

Barrel Timing Hodoscope, New Design

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……. …….

Scintillator Tile Signal Trans- mission Line ASIC

SciTil “proposal” MEG2 SciTil 30x30 120x40/50 90x30

σ~90 ps σ~90 ps

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SLIDE 12

Micro Stripline Technique

  • Coaxial-like structure to transmit signals over a PCB board, realised on a

multilayer PCB board, that feature:

  • High density
  • Good shielding from external noise
  • High bandwidth
  • Low crosstalk
  • Mechanical strength

First prototype 2 GND per line

sidecut

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SLIDE 13

Crosstalk between the Micro Striplines (Prototype n°1)

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Crosstalks can be reduced e.g. by using “via” and/or by optimizing the channel sequence

Tested in realistic condition.

1ns rise-time = 350 MHz

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SLIDE 14

Probable Best Design

single ground layer interconnected at the board ends lines shuffled to minimize the distance they share as direct neighbour design not tested yet, due to considerable manufacture delay. Delivered last week. due to some spare space on the railboard and no extra cost, few other designs were added and will be tested for comparison This design = crosstalk reduction? Less copper as prototype 1 = material budget reduction.

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SLIDE 15

TOFPET2 ASIC test board (64ch) Test assembly with SiPM and ASIC board

Front End Electronics

SiPM + LYSO crystal

TOFPET2 ASIC readout 66cm allocated for FEE

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SLIDE 16

Summary

  • Barrel Time-of-Flight Detector for PANDA
  • 240cm long, 5m2 sensitive area, 15.360 SiPM, 2.000

Tiles, 4.000 channels

  • series connection of 4 SiPMs
  • Cable-less design with transmission lines over PCB

board

  • σt~50 ps, lab test. Beam test, see talk Albert Lehman

(tomorrow 11:45)

  • Detector installation ~ 2022

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SLIDE 17

Backup

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SLIDE 18

Performance - single tile

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Time resolution depend of Pole Zero Cancelation PZC = 1200Ω PZC = 500Ω

Reproduced in 2017: 63.2ps for 1200Ω and 53.4ps for 500Ω

230V bias 230V bias PZC = 500Ω 240V bias Bias voltage also has slight impact on time resolution Threshold scan:

11.3mV : 49,7 +/- 1,9 ps 20mV : 47.0 +/- 2.8 ps 40mV : 48.3 +/- 3.4 ps 50mV : 50.3 +/- 5.0 ps 75mV : 50.3 +/- 3.4 ps

Best time-resolution for 20mV threshold

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SLIDE 19

Capabilities and Requirements, and Detector Layout

  • between the Barrel DIRC and

the EMC

  • high efficiency to charged

particles

  • blind to γs

19

SciTil DIRC

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SLIDE 20

Super Module

  • a half length prototype
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SLIDE 21

Large PCB (railboard) production issue & Delivery Delay (3.5 months late)

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2400 1800 660 1800+X 660-X

D A

900 900

Half-length was not a problem. Full length is. Production at CERN?

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SLIDE 22

Monitoring and Calibration

  • Voltage and current monitoring
  • the primary parameter that influences the

characteristics of SiPM

  • general health check
  • Temperature
  • SMD PTC on the sensor-board
  • relative: 200 mK, absolute: 4 K
  • Gain
  • DCR: 10-100 kHz/mm2
  • LED calibration system
  • SMD LED on the sensor-board
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SLIDE 23

SciRod (Erlangen) cont’d

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SLIDE 24

The best time precision when triggering on the first photon? Analog SiPM

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Time resolution of a scintillator tile read-out with the Hamamatsu SiPMs

No, the trigger threshold should not be set to the first detected photon,

due to electronics noise and the SPTR of the SiPM.

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SLIDE 25

The best time precision when triggering on the first photon? Analog SiPM

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wever analog SiPMs, this behaviour is changed due to electronics noise and the SPTR

Time resolution of a scintillator tile read-out with the Hamamatsu SiPMs

No, the trigger threshold should not be set to the first detected photon

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SLIDE 26

SPTR of SiPMs

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2 options: Hamamatsu or Ketek (3x3 mm2) AdvanSiD: worse timing, low PDE SensL: also lower PDE Ketek with optical trenches showed best results with picosecond pulsed laser (400 nm) SPTR

Time resolution follows 1/√N We expect ~ 60 photons per SiPM: Hamamatsu 100P → σ ~ 40 ps KETEK PM3350 → σ ~ 25 ps

“Time resolution below 100 ps for the SciTil detector of PANDA employing SiPM” S.E. Brunner, L. Gruber, J. Marton, H. Orth, K. Suzuki

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SLIDE 27

Micro Stripline Technique

  • Coaxial-like structure to transmit signals over a PCB board, realised on a

multilayer PCB board, that features

  • High density
  • Good shielding from external noise
  • High bandwidth
  • Low crosstalk
  • Mechanical strength
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SLIDE 28

Complementary Designs Railboard v2.

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SLIDE 29

Rate Capability

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  • Max. tile hit rate
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SLIDE 30

Signal Attenuation on the Micro Striplines

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The attenuation can be reduced by increasing the cross section of the signal micro strip

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SLIDE 31

Crosstalks between Micro Striplines

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1 ns rise time 1.4 % 3.9 %

Crosstalks can be reduced e.g. by using “via” and/or by optimising the ch. sequence

1 6 11 16 21 26 2 7 12 17 22 27 3 8 13 18 23 28 4 9 14 19 24 29 5 10 15 20 25 30

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SLIDE 32

Efficiency

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design A design B

Sensor recovery time: ~50 ns, TOF-PET chip >300 kHz average through-put, Max tile hit-rate is ~40 kHz, TOF-PET chip has a buffer (4 hits) to cope with locally high-rate events 100 MHz assumed

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SLIDE 33

TOF-based Particle Identification

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from simulation

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SLIDE 34

Relative TOF

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SLIDE 35

Relative TOF

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SLIDE 36

Radiation Hardness of SiPMs

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SLIDE 37

Radiation Hardness of SiPMs

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SLIDE 38

Radiation Hardness of SiPMs

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SLIDE 39

Radiation Hardness of Scintillator Material

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Expected dose ~8.4 kRad

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SLIDE 40

Front End Electronics, DCS

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SLIDE 41

Monitoring and Calibration

  • Voltage and current monitoring
  • the primary parameter that influences the

characteristics of SiPM

  • general health check
  • Temperature
  • SMD PTC on the sensor-board
  • relative: 200 mK, absolute: 4 K
  • Gain
  • DCR: 10-100 kHz/mm2
  • LED calibration system?
  • SMD LED on the sensor-board