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|Title:||Estimation of the Impurity Levels in Polyimide Foils and the Life-Time of the Foils Irradiated by Charged Projectiles|
|Authors:||JASKOLA M.; KORMAN A.; STOLARZ ANNA|
|Citation:||NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SP vol. 590 no. 1-3 p. 176-180|
|Publisher:||ELSEVIER SCIENCE BV|
|Type:||Articles in periodicals and books|
|Abstract:||Entrance windows to gas detectors or gas target-cells must satisfy many requirements. They must have: adequate mechanical strength to withstand gas pressure over a reasonably large aperture; thermal, chemical and radiation resistance; thickness homogeneity; no significant level of contaminates, and low stopping power to minimize energy loss of the projectiles, etc. In addition, they should be pin-hole free. Development of the in-situ polymerisation method used to produce the polyimide foils allowed preparation of very thin (10 µg/cm2) foils that are widely applied as backings in target preparation. Applicability of the foils prepared by this method as entrance windows to gas detectors is investigated. In the present studies two critical parameters of thin polyimide foils prepared by in-situ polymerization have been quantified. Namely: a) the level of impurities and their composition; b) the ability of the foils to withstand various beam currents (life time of the foil).|
|JRC Institute:||Institute for Reference Materials and Measurements|
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