OD HV Upgrade

Hans BernsJeff WilkesU. of Washington10/14/01

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.

New OD HV Paddle Cards

Channel circuit changes

Old paddle cards

New paddle cards

Installation

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

Shift workers’ notes

Switches and indicators: – enable/disable channel with DIP switch– LED on = enabled

Ribbon cable = HV relay power/control

Lemos for scope ports

HV in from LeCroy supplies

Same cables to QTCs

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: seehttp://www-sk.icrr.u-tokyo.ac.jp/~berns/SUPERK/odhelp.html#paddlecards