Shift Summary 16:00 October 23, 1996
Gollwitzer, Luppi, Lo Vetere, Streets and others.

	The trigger work carried over into the beginning of the shift. When 
starting their work it was noted that the PCOS DYC would hang the DAQ; the
command bus was disconnected and the PCOS was effectively removed from the
data stream.
	When the trigger work was finished, the gas jet intensity was raised
so that the luminosity was ~10^31 cm^-2 s^-1 and trigger rates were observed.
The three main triggers are e+e-, gamma-gamma, and etot neutral (the latter
two only used FH and (H1 H2' OR) in veto; the FCAL OR is not part of the
trigger); the rates were respectively, 200, 250, 630 Hz. 
	However, one DYC would become out of synchronization with respect to 
the other 12 DYCs. Much time was spent to determine if there was a change in 
the cabling or bad connectors before swapping out the DYC (spares are kept
by PREP). 
	After pedestals were taken and recorded, the first chi_2 data run was 
started. Since PRUDE was filtering by requiring neutral events to either have
a pair of clusters form an invariant mass greater than 2GeV or the total energy
observed in the CCAL to be greater than 90% of the lab energy, the gas jet 
density was raised until the rate to tape was maximized (500Kbytes/sec for a
tape drive). The luminosity is essentially 1.8*10^31 and a trigger rate of
1.6KHz.
	Several runs have been taken. These runs have been ended by tape drive
problem or DAQ hang. The former problem is when any tape drive has a problem
with writing. It could be a hardware problem, dirty drive or a bad tape. 
Cleaning the tape drive seems to help. This problem is identified by a murmur
message about W_XFER with a value of -1 (see log book). The latter problem is
when the DYC with the trigger logic and counter TDCs becomes full. As George
has noted, this DYC averages the most data per event and the possibility of
very large number of multiple hits for many channels can occur. 


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