Test Tube Activities at Ohio State (7/29/03)

1
Test Tube Activities at Ohio State (7/29/03)

• Amphenol/Spectra Strip will send two 10 m long
  samples of signal cable
• With a (round) jacket, shielding
• 20 pairs (more than we need. Can we crimp this to
  the connectors?)
• Who will make the signal cables? (I wont be at
  SLAC before Aug. 26)
• Kerpen HV cable is not available.
• No stock at CERN or Kerpen (in 10, 20 or 25 wire
  configuration)
• 37-wire cable available at Kerpen (not
  recommended)

2
HV Connection(s)

• HV capacitors
• Cable Connector
• Anode signal readout
• What HV connector? Do we have room for 8?
• Pigtail for anode signals/short?
• Short wires to endcaps
• Build at OSU, send to Princeton

Large Cell LST
4x
1 MOhm
HV
1 nF
Anode Signal
3
Differential Driver and Preamp

• Based on Angelos design (from Princeton
  workshop)
• On chamber preamp with differential output (4
  channel PC board)
• Differential receiver and preamp with analog
  output.
• No discriminator or digital output (needs to be
  added for DAQ readout)
• Both modules have been built and are currently
  being tested.
• Will send driver circuit to Princeton for
  installation in module/Al box.

4
Integration Questions

• How do we connect the signal cables to the
  strips?
• Does everything have to be in the Al box?
• Can we have 6 pigtails that connect to the
  signal cable and/or the preamp circuit?
• We need to know, how much space is available in
  Al box (also for HV)
• We would like to be able to test several
  combinations
• Baseline design (no diff. driver/preamp, Standard
  FE receiver/preamp)
• Differential design (with differential preamp,
  receiver)
• Pseudo differential (no diff. driver/preamp,
  differential receiver)

Jumperboard
BaselineReceiver
Tube 1
DifferentialReceiver
Tube 2
Differential Driver orjumper board
Al box
Can go on either tube