Accession Number : AD0745579

Title :   Thin Film Window for Gas Flow Proportional Detector.

Descriptive Note : Final rept. Feb-Aug 70,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Theis,Clarence F. ; Kay,Thomas D.

Report Date : JUL 1972

Pagination or Media Count : 18

Abstract : The gas flow proportional detector used for counting radioisotopes incorporates a Micromil window which covers the open end of an ionization chamber. When it becomes contaminated or damaged, the window, with supporting metal ring, must be replaced with a new one at significant expense. A procedure was developed to reuse the rings in making new windows which are referred to here as gas flow ultrathin (GFUT) windows. The GFUT window has these advantages: it can be made in the laboratory from material that costs less than one cent per window; it is stronger than the commercial window; and it can be washed and reused. The time required to remove a damaged window, place a GFUT window on the same ring, and replace the window in the gas flow detectors is only 30 minutes. GFUT windows can be used satisfactorily in Nuclear-Chicago models D-47 and D-470 or similar systems. (Author)

Descriptors :   (*PROPORTIONAL COUNTERS, GAS FLOW), FILMS, RADIOACTIVE ISOTOPES, STATISTICAL ANALYSIS, COUNTING METHODS

Subject Categories : Nuclear Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE