"Paddle" Card for the SuperK Outer Detector
(made by the LSU group
for the SuperK US collaboration)
Purpose:
- Distribution of the high supply voltages (1.5...2.5 kV) to 12
photomultiplier tubes (PMTs) of the outer
detector per card.
- Splitting off the low-voltage analog pulses for the preamp and
discriminator boards (e.g.
QTCs) of
the outer detector data acquisition (OD-DAQ) system.
NEW! Proposal for
Outer Detector High Voltage Paddle Card
Upgrade (12/1999, updated 2/2000).
Schematics
Where are these cards mounted?
In each outer electronics hut there are 2 special crates (made by LSU
members as well?) holding up to 20 paddle cards, giving a capability of up
to 480 PMT channels for each quadrant. Here's a picture taken during the
hardware installation phase in one of the outer electronics huts.
Centered between the two paddle card crates is the high-voltage mainframe
unit (
LeCroy model 1454), a programmable unit where each paddle card can be
individually supplied with the HV from 0...3 kV.
PMT Test + Measurement Aides
1. Paddle Card Scope Interface with LEMO connectors
Plugs between the 50-pin connector of the paddle card and the special coax
ribbon cable to the QTC. The analog signals of each PMT can be
individually checked by a scope through a LEMO connector.
HGB, edited 2/14/97
