May 15, 2000
These figures give the pressure history for PCU 1 (1-5 numbering).
Propane pressure in PCU 1 starting
on Friday May 12, 2000. The propane pressure is fit with an exponential
decay with a time constant of 39.5 ksec.
Xenon pressure in PCU 1 starting
on Friday May 12, 2000. The Xenon pressure drops due to expansion of
the xenon window into the propane volume. The plot was constructed
by taking the ratio of Xenon pressure in PCU 1 to xenon pressure in PCU 3.
This removes an orbital temperature effect which is comparable to
the overall 0.5% drop in pressure.
These figures show the rates from PCU 1 and 3, from a period when PCU 1 was turned on after the propane layer became empty.
PCU 1, 3 rates shows rates fro PCU 1 and 3
separately by layer. All channels are included. The "excess" in PCU 1
is confined to the top layer.
Excess rate in layer 1 is estimated by subtracting
the PCU3 layer 1 rate from the PCU 1, layer 1 rate. The excess rate is
is 7.6 ct/sec averaged over all channels, and 4.6 ct/sec in channel 0-27.