Today (22-APR-1999) we changed the ERP S/H card for channels 4E08,
4E09,4E10 and 4E11 due to a strange behaviour of TDC-H for 4E08-1.
More precisely, since about run 17388, the Muon ERP calibrations revealed
a jitter in streamer-tube vs. TDC-H line fit about double the rest of
ERP channels. A much higher jitter was revealed in the TDC-H vs. TDC-L
fit, always for 4E08-1.
We swapped in a (spare) ERP S/H card that was recently brought to G.S.
by Hwi Kim. Please note that the first spare card we tried to swap in did
not work - side-1 of the 3rd channel resulted dead.
We have run all ERP calibrations today and the data so far look good.
Yet, keep an eye on the data quality for this channel. The first run
following the swap is 17492 (even though this is a PHRASE-only run...).
Regards,
Ioannis Katsavounidis