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User name mhuang
Log entry time 01:49:56 on April 5,2012
Entry number 370145
keyword=Check of optics data taken 4/4 owlOptics runs were taken for half delta scan (-3.5%, -2%, 0%) and beam x position scan for new right septum at 2.5T, 90deg configuration.
I did a check of the data and found
1. From dp plot, it looks like significant amount of LHe still left around C foil.
2. No tg_y shift was showed in the runs of beam xpos change. (22707/3678, 22709/3680)
However, similar runs taken with old septa showed tg_y shift. (22040/2944, 22042/2946).
Comparing the IPM1H05A.XPOS and IPM1H05B.XPOS values (I am not sure if they are comparable for runs many days apart), the earlier runs have much larger xpos shift: +5 --> -6, while yesterday runs only have: 2 --> 1.3.
Thus, we cannot see tg_y shift probably because xpos changed so little that HRS resolution was not able to distinguish them.
FIGURE 1
FIGURE 2
