OD HV Upgrade

1
OD HV Upgrade

• Hans Berns
• Jeff Wilkes
• U. of Washington
• 10/14/01

2
New OD HV Paddle Cards

• VME 9U height (14.4")
• Standard VME C-type front panel and ejector
  latches for robust and precise mounting
• High voltage relay instead of jumper for each PMT
  channel.
• Front panel DIP switches for manual
  enable/disable of each channel.
• LEDs for HV status of each PMT channel on front
  panel (relay on/off display).
• Header jack on front panel for relay remote
  control input.
• Remote control system is under development
• LEMO jack on front panel for each PMT signal
• Scope signal available without disconnecting the
  coax ribbon cable to the QTC.

3
New OD HV Paddle Cards
4
Channel circuit changes

• Old paddle cards
• New paddle cards

5
Installation

• Test installation (Hut 1) 11/21/00
• Full installation began 4/27/01
• Completed 5/2/01

6
Shift workers notes

• Switches and indicators
• enable/disable channel with DIP switch
• LED on enabled

HV in from LeCroy supplies
Ribbon cable HV relay power/control
Lemos for scope ports
Same cables to QTCs
7
Procedure for disabling OD channels

• Procedure for disabling or enabling an OD
  channel
• DISABLE the selected HV channel using the LeCroy
  HV controller in the appropriate hut.
• Change the setting of the dip switch for desired
  channel on its paddle card
• red LED next to the LEMO jack of each channel
  shows whether the relay is on or off.Note The
  LEDs monitor relay status only, NOT HV status!
• RE-ENABLE the selected HV channel.
• For full details see
• http//www-sk.icrr.u-tokyo.ac.jp/
• berns/SUPERK/odhelp.htmlpaddlecards