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User name R. Subedi
Log entry time 05:22:14 on December 21, 2009
Entry number 308613
This entry is a followup to: 308605
keyword=Sieve OPEN
The Sieve was supposed to be always in OPEN position (0.8705 meter) when
we intend the sieve to be out. For some reason, before Dec 17th,
including all Happex III run-period, the sieve position was in "6 msr"
position which is 0.6188 meter. This was limiting the spectrometer
acceptance compared to the sieve "OPEN" position case. After Dec 17, when
we started doing OPTICS runs, we set the sieve either in "sieve in"
position or in "OPEN" (means sieve out) position. Kai noticed a good
point here. Taking the sieve "OPEN" position optics data, we can always
use solid angle cut to see the "6 msr" position effect. But if we put the
sieve in "6 msr" position, we can not get back the the sieve "OPEN"
position solid angle acceptance where we took all our resonance data.