Pinhole detection in thin foils used in space plasma diagnostic instrumentation

H. O. Funsten, B. L. Barraclough, D. J. McComas

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The efficiency of thin foils which are used for charge state modification, start/stop pulse triggering, and UV shielding in space plasma diagnostic instrumentation is highly sensitive to pinholes in the foil. In this study, we present a high resolution method to map pinhole locations and sizes in thin foils based on the different transmission properties of incident ions through holes and hole-free regions of the foil. Results are presented for 200-eV ions transmitted through 0.2-, 0.5-, and 1.0-μg/cm2 carbon foils. Acceleration of transmitted ions into the imaging detector increases both the imaging resolution and the contrast between holes and hole-free regions of the foil.

Original languageEnglish (US)
Pages (from-to)4741-4743
Number of pages3
JournalReview of Scientific Instruments
Volume63
Issue number10
DOIs
StatePublished - Dec 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Instrumentation

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