TWIST Hardware Documentation

Dealing with Hardware Trouble

Magnet Safety

Film Degrader

• List of film degrader thicknesses.

Laser Alignment System

• Images captured by alignment cameras

GAS System

• Directory
• "Time constant" of the gas degrader (time it takes to change settings).

Magnet

• Annotated history plots from the cooldown and ramp:
  • Solenoid shield temperatures, long scale
  • Solenoid shield temperatures, short scale
  • Coil resistors, indicative of coil temperature
• Notes on the LN2 level sensor
• "Safe" levels of LN2 and LHe in the magnet.

FASTBUS

• Fastbus interlock system and Air Conditioning after a power failure
• Nominal voltage and current readouts for FB crate power supplies.
• 1877 Lecroy Fastbus TDC
• 1877s Lecroy Fastbus TDC
• 4100 SIS Fastbus master (pseudo SFI)
• Corrected page 9
• VME interrupt fix for modules produced before Aug 1999

PAD - Postamp discriminator

•   Front panel
•   Schematics: Overall  ;  Ch 1 & 2
•   Schematics: threshold and test pulse voltage control  ; voltage and temperature monitor

PA_CTRL 0945 - Postamp Control Module

•  User's manual , Addendum - PACT
•   Front panel
•   Schematics: Sheet 1  ; Sheet 2  ; Sheet 3

PACT 0948 - Postamp Charge to Time Converter

• Description
• Front Panel
• Schematics: channels 1 and 2 ; power distribution
• Schematics: test pulse, gate and range ; voltage and temperature monitor

High Voltage

• Scintillators: High Voltage cabling and settings
• Chamber HV system: Description;
• HV PS control breakout schematic
• HV PS control breakout  box
• HV PS control CAMAC  crate
• Mods to Vern Kiebler power supplies
• Nominal Detector Settings including High Voltage settings.

CABLING maps

• Chamber Cabling Map :
• Z/X view(2002)     Z/X view(2001)
• X/Y view(2002)     X/Y view(2001)
• PAD Cabling: Maps
• Fastbus Cabling: FBC1, FBC2
• CAMAC cabling: scalers
• Scintillators: High Voltage cabling and settings

Event Trigger

• Overview
• Logic diagram (jpeg, 184 kB)
• Some instructions on changing the event trigger

M13

Miscellaneous

• Preamp 4v supply: schematic, front panel layout
• Cathode foil thickness