Make New Entry, Make Followup Entry
User name brads
Log entry time 17:33:59 on March 3,2009
Entry number 264363
This entry is a followup to: 264201
keyword=Linac energies around Feb 28I wish I could cut out the beam trips in the archive viewer. Sorry about the noisy plots.
Fig. 1 is the ARC1 energy, Fig. 2 is the ARC 2 energy.
Gain_NorthLinac = ARC1 - E_Inj
Gain_SouthLinac = ARC2 - ARC1 - E_Inj
So these plots give us a rough idea of the linac energies over the time where the compton polarization changed. There's an interesting drop in the pass2 energy starting at 1pm on Feb 26, but nothing in pass1. The pass energies get extremely noisy starting on the 28th (when the half-wave plate was inserted and the Compton noted a change in its asymmetry). The central values are actually pretty stable, but the std. dev. is much wider than it used to be. I don't see a smoking gun here...
FIGURE 1
FIGURE 2
