Status of scintillator detector development for central part of the tof cbm
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#2. #4. #5. #1. #3. PADI. Amp. Amp. Amp. Amp. Amp. Amp. Amp. PMT2. LeCroy ADC&TDC (CAMAC). Status of scintillator detector development for central part of the TOF CBM.

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Status of scintillator detector development for central part of the tof cbm

#2

#4

#5

#1

#3

PADI

Amp

Amp

Amp

Amp

Amp

Amp

Amp

PMT2

LeCroy ADC&TDC (CAMAC)

Status of scintillator detector development for central part of the TOF CBM

INR (Moscow) group proposed to use scintillator detector with MAPD readout as a cheap and reliable solution for central part of the CBM TOF wall with the cell size of 20x20 mm2

This conception was experimentally tested at GSI (FOPI) in April 2009

  • 3.5 GeV protons scattered at ~40 from FOPI target were used;

  • Start counter with two PMT readout has time resolution st~40 ps;

  • Six Scint (Kharkov)+MAPD-3N (Zecoteck) individual counters 20x20x20 mm3;

  • Amplifier with input impedance 4 Ohm, bandwidth 300 MHz and G~120 was used;

  • LeCroy TDC has scale 50 ps/ch.

PMT1


April beam test results & nearest plans

Time resolution

after slewing correction

MAPDs were no selected before test and have different PDE!

It was demonstrated that scintillator detector with MAPD-3N readout is promising for central TOF

MAPD-3N

(ZECOTECK)

Gain vs Vbias

PDE vs Vbias

  • Preselection of MAPDs with highest PDE;

  • Develop new faster preamp with lower noise;

  • Use of monoenergetic beam

November `09 beam test

at CERN


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