Page History

The effectiveness of single photon peak finders is analyzed in the text below. Three different methods are compared: the V1, V4 and The V1 peak finder is used as the default peak finder along with the V4 and a square peak finder methods which are described belowwith which to compare.

The data from experiment xcs06016 and run 37 were used in this analysis. Only sparse events were used so multiple photon peaks or pixels shared by multiple photons are extremely rare; events with less than 3000 peaks found by each peak finder were used. A total of 13 events were used. The purpose of these analyses is to determine which (if any) of the following methods discussed below have an appreciable effect on the RMS of the distribution of the energy. Through the entirety of this study, the parameters were held constant unless otherwise stated. For the square peak finder, an initial threshold of 10 ADU was used. For the V1 and V4 algorithms, a rank of 1, a low threshold of 10 and a high threshold of 30 were used. The other parameters were set so as to not any noise subtraction in the calculation of the peak energies. The maximum peak size was set at 4 pixels since a single photon peak of greater than 4 pixels is unreasonable.

...