Operator: akdogan
It has been a pretty smooth shift. Continued to take polarized D2 data.
Beam was stable; filling 140mA, dumping at ~85mA with a beamlife of 22min.
During the first hour, CCR had a minor problem with the slits which costed
about 15-20 minutes. Other than this, there was no interuption for data
taking. The recorded data rate (the red needle) was around 270 C / hr.
Beam polarization is rather high. The online monitor shows 68.9 +- 0.9% for
the last 8 hours.
The latest crunched data (today's shift-A data) shows high target polarization:
Vector-L: 0.667 +- 0.065 (dil)
Vector-R: 0.511 +- 0.052 (dil)
The run size was increased to 500k event during the last shift. With this limit;
a run is completed in about 50 minutes, the file size is about 800MB (below
the file-system limit), and it takes about 11.5hrs to crunch on a spud node.
Other than these, the online histograms looks fine, the HV crate didn't fail.
There was no HV trips other than those happened during the slit problems.
Coda required a firm hand once, and autocruncher did a nice job, and all
runs are being crunched.
Taylan
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:31 EST