Pass/Fail Criterion for a Simple Radiation

• 作者: Avigdor Gavron Tom Burr
• 来源期刊: 现代仪器(英文)
• 学科: 数学
• 关键词: POISSON Distribution RADIATION PORTAL Monitor Tolerance INTERVAL
• 年，卷（期）: 2012,（3）
• 页码范围: 27-33
• 页数: 7页
• 分类号: O1

摘要

One of the simplest tests of a radiation portal monitor (RPM) is a series of n repeats (a vehicle drive-through) in which the ith repeat records a total number of counts Xi and alarms if Xi ≥ T where T is an alarm threshold. The RPM performance tests we consider use n repeats to estimate the probability p = P(Xi ≥ T). This paper addresses criterion A for testing RPMs, where criterion A is: for specified source strength, we must be at least 95% confident that p ≥ 0.5. To assess criterion A, we consider a distribution-free test and a test relying on assuming the counts Xi have approximately a Poisson distribution. Both test options require tolerance interval construction.