Post by jsmith on Feb 13, 2015 17:47:07 GMT -8
I've observed a gain oscillation in the integrated charge peaks in GRIFFIN. Plotting the integrated charge ("Charge" in the FragmentTree) vs. MidasTimeStamp and zooming in on a single peak shows an oscillation in the peak value over time. This oscillation has a period of approximately 5 minutes. Here's a plot that shows the temperature of one of the electronics shack probes (top) as a function of time and also the integrated charge of an ~2 MeV peak as seen by the white crystal of detector 4 as a function of time:
The time axes here have been aligned, if rather crudely. The most significant effect here is a broadening of the apparent resolution of the detector.
We plan to take some data in the coming weeks that we hope will shed some light on the "how is the AC affecting the GRIFFIN signal?" question. Specifically, we'll run with a few different cable configurations to isolate the location of the effected component and a few with different AC behavior to confirm that the AC is the cause. During these runs, we will record temperatures of various components using the Epics system.
The time axes here have been aligned, if rather crudely. The most significant effect here is a broadening of the apparent resolution of the detector.
We plan to take some data in the coming weeks that we hope will shed some light on the "how is the AC affecting the GRIFFIN signal?" question. Specifically, we'll run with a few different cable configurations to isolate the location of the effected component and a few with different AC behavior to confirm that the AC is the cause. During these runs, we will record temperatures of various components using the Epics system.
