Study of RS TDC using kmu2 and kbeam data

This study was performed using special runs with kbeam trigger when signals from the trigger card were plugged into BV TDC system to study time offsets. Special runs were taken before and after the trim. Also km21 trigger data were taken before and after the trim. Kbeam runs were analyzed using rc_tdc.F , km21 runs were analyzed using rs_tdc.F . Individual channels were scanned using zoo.kumac . Basically RS TDC time was subtracted from IC time and booked.

Different types of TDC channel errors
Plot Notation Appearance Source of Problem
top left corner <> normal channel
top right corner !! double peaks separated by exactly 256 TDC counts Bad DYC cables
bottom left corner XX Multiple peaks, complete garbage BAD TDC header + BAD DYC cables
bottom right corner DP Multiple peaks, complete garbage BAD TDC header, signals from 2 TDC overlab each other.

The map of all RS TDC channels. This map was used as a guide to identify "bad" RS TDC modules that were studied by Sasha using pulser data and fixed by Bob and Peter.

Alexander Kushnirenko
Last modified: Thu Jul 19 00:46:18 CDT 2001