Count-Rate Statistics for Drift Detectors.
Synchrotron light sources are low-duty-cycle pulsed X-ray sources, a fact that is often neglected in estimating the count-rate capabilities of photon-counting detectors in synchrotron-based experiments. In this paper, we demonstrate the effect that this has on the pileup statistics of drift detectors. We derive expressions for the cases of continuous and pulsed X-ray sources. We consider a pulsed source with period that is either much less than the shaper support time or much less than the average drift time. We also consider a pulsed source with a period that is long or comparable to both the shaper support and the drift time. These conditions correspond to normal and reduced bunch fill patterns of synchrotrons.
National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY 11973 USA. He is now with InterDigital Communications Corporation, Melville, NY 11747 USA.
Philip J
PJ
Pietraski
Optical Sciences Center and the Department of Radiology, University of Arizona, Tucson, AZ 85724 USA.
Lars R
LR
Furenlid
Drift detectors; high count-rate detectors; pile-up statistics