High speed pulse digitization in driftless gas scintillation proportional counters

The experimental arrangement used to examine light pulses of the driftless-gas-scintillation proportional counter are described and two applications using pulse-shape parameters are discussed. Since true X-rays should have a profile at least similar to a particular shape, events with a widely different profile can be rejected immediately. Events that have no software-discernable plateau are labeled spurious. This procedure typically rejects 60% of all laboratory background events. The problem of the dependency of the integrated light pulse (pulse height) on burst length is the second application considered for use with higher-energy X-rays