Post by jsmith on Feb 16, 2015 12:25:30 GMT -8
The GRIF-16s exhibited variable relative counting rates during the November/December 2014 experiments. We observed this in online data viewed through the Analyzer and it is also visible in the offline data.
I've attached two plots that show the hit pattern (number of counts in each channel) as a function of time for run 2369 from the 47Ca data. The top plot shows all channels on a log scale and the bottom plot shows only the GRIF-16 channels (no 4G information) on a linear scale. As you can see, at discrete times during the run, the relative counting rate of the third GRIF-16 changed.
My initial thought was that this could be corrected by plotting the number of lost "ChannelId" values over time, but after spending a few minutes trying that, I don't think ChannelId holds the information we need.
I've attached two plots that show the hit pattern (number of counts in each channel) as a function of time for run 2369 from the 47Ca data. The top plot shows all channels on a log scale and the bottom plot shows only the GRIF-16 channels (no 4G information) on a linear scale. As you can see, at discrete times during the run, the relative counting rate of the third GRIF-16 changed.
My initial thought was that this could be corrected by plotting the number of lost "ChannelId" values over time, but after spending a few minutes trying that, I don't think ChannelId holds the information we need.
