Status of the V0 electronics

1
Status of the V0 electronics

• Tests of photomultipliers
• Signal treatment
• Electronics
• Milestones

2
Photo-multiplier
from T0 R5505 R5946 R7761
Tube/cathode Ø/length 32/20/65 25/17.5/40 38/27/50 39/27/50
Number of stages 15 15 16 19
HVmax 2500 2300 2300 2300
Gain2000 V at 0 T/0.5 T 2/1.6 105 5/2.3 105 106/4.3 105 107/3 106
Rise/transit (ns) 1.5/6 1.5/5.6 1.9/7.2 2.6/7.5
Dark current (typ/max) (nA) 5/20 5/30 5/30 15/100
Pulse linearity (2) (mA) ? 180 360 500
3
Charge, gain, time resolution
Signal x 10 25 m cable
4
Pulse treatment
5
FEE
6
Timing for BB and BG
7
Minimum-bias triggers

• Starting from the discriminator or the NINO
  signal
• BB signal detected in time windows centered at
• 11 ns (V0A) and 3 ns (V0C)

• BGA signal detected in time
• windows centered at
• -11 ns (V0A) and 3 ns (V0C)
• BGC signal detected in time
• windows centered at
• 11 ns (V0A) and -3 ns (V0C)

bbc
bba
8
V0 mechanics milestones

• Fall 2004
• End 2004
• March 2005 sector 0 of V0A (Mexico) and V0C
  (Lyon)
• PRR submission
• Fall 2005 V0C ready for commissioning, PMT
  characterization (Lyon)
• (MIP from each channel,
  noise, gain of each PMT)
• End 2005 V0A ready for commissioning, PMT
  characterization (Mexico)
• (MIP from each channel,
  noise, gain of each PMT)
• Spring 2006
• June 2006 V0C ready for installation in ALICE
• (array fibre bundles PMT
  mechanics)
• End 2006 V0A ready for installation in ALICE
• (array fibre bundles PMT
  mechanics)

• Responsibles
• Mechanics J.Y. Grossiord
  (Lyon), XXXX (Mexico)

9
V0 electronics milestones

• Fall 2004 electronics concept finalization
• End 2004 CIU design prototype test (charge,
  time, pre-process of triggers)
• March 2005
• Fall 2005 (final trigger signal, collection of
  the data, interface TTC/FEE)
• CCIU and TTCIU design
  prototype test
• PRR submission
• End 2005
• CIU, CCIU, TTCIU electronic
  design, setting
• Spring 2006 electronics design ready for
  realization
• June 2006
• electronics construction
• End 2006
• electronics test,
  calibration
• electronics ready for
  installation in ALICE

• Responsibles Electronics Y. Zoccarato

10
V0 milestones

• Fall 2004 electronics concept finalization
• End 2004 CIU design prototype test
• March 2005 sector 0 of V0A (Mexico) and V0C
  (Lyon)
• PRR submission
• Fall 2005 V0C ready for commissioning, PMT
  characterisation (Lyon)
• CCIU and TTCIU design
  prototype test
• PRR submission
• End 2005 V0A ready for commissioning (Mexico)
• CIU, CCIU, TTCIU electronical
  scheme
• Spring 2006 electronics design ready for
  realization
• June 2006 V0C ready for installation in ALICE
• electronics construction
• End 2006 V0A ready for installation in ALICE
• electronics test,
  calibration
• electronics ready for
  installation in ALICE

• Responsibles Electronics Y. Zoccarato
• Mechanics J.Y. Grossiord
  (Lyon), XXXX (Mexico)

11
V0 cost for 64 channels (R5946)
label unit spare unit price total price
PM R5946 64 - 1712 109568
HV SY2527/A1733P 1/6 - 8812/2929 26386
VME 1 - 9000 9000
Electronics 64 2 70000
Mechanics PM boxes 2 - 1000 2000
Scint. V0A/V0C (m2) 2 x .6 - 1500 1500
WLS F. V0A/V0C (m) 2 x 346 - 3.3 2284
Clear F. V0A/V0C (m) 2 x 3456 - 1.0 6912
Total in Total in Total in Total in 227650
Total in SF Total in SF Total in SF Total in SF 341475
HV cab. V0A/V0C (m) 270 - 5.8 1566
HV con. V0A/V0C (448) - 4756
Sig. cab. V0A/V0C (m) 2 x 1600 - 2.0 6400
Sig. con. V0A/V0C (2 x 576) - 11136
Total in SF Total in SF Total in SF Total in SF 365333