Terahertz Imaging and Backscatter Radiography Probability of Detection Study for Space Shuttle Foam Inspections

[摘要] This slide presentation reviews the use of terahertz imaging and Backscatter Radiographyin a probability of detection study of the foam on the external tank (ET) shedding and damaging the shuttle orbiter. Non-destructive Examination(NDE) is performedas one method of preventing critical foam debris during the launch.Conventional NDE methods for inspection of the foam are assessed and the deficiencies are reviewed.Two methods for NDE inspection are reviewed: Backscatter Radiography (BSX) and Terahertz (THZ) Imaging.The purpose of the Probability of Detection (POD) study was to assess performance and reliability of the use of BSX and or THZ as an appropriate NDE method. The study used a test article with inserted defects,and a sample of blanksincluded to test for false positives. The results of the POD study are reported.

[发布日期] 2008-11-10

[学科分类] 航空航天科学