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R&D of Commercially Manufactured Large GEM Foils
Posik, M Surrow, B IEEE
Posik, M
Surrow, B
IEEE
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2015
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10.1109/nssmic.2015.7581802
Abstract
Many experiments are currently using or proposing to use large area GEM foils
in their detectors, which is creating a need for commercially available GEM
foils. Currently CERN is the only main distributor of GEM foils, however with
the growing interest in GEM technology keeping up with the increasing demand
for GEM foils will be difficult. Thus the commercialization of GEM foils has
been established by Tech-Etch Inc. of Plymouth, MA, USA using the single-mask
technique, which is capable of producing GEM foils over a meter long.
To date Tech-Etch has successfully manufactured 10 $\times$ 10 cm$^2$ and 40
$\times$ 40 cm$^2$ GEM foils. We will report on the electrical and geometrical
properties, along with the inner and outer hole diameter size uniformity of
these foils. Furthermore, Tech-Etch has now begun producing even larger GEM
foils of 50 $\times$ 50 cm$^2$, and are currently looking into how to
accommodate GEM foils on the order of one meter long.
The Tech-Etch foils were found to have excellent electrical properties. The
measured mean optical properties were found to reflect the desired parameters
and are consistent with those measured in double-mask GEM foils, as well as
single-mask GEM foils produced at CERN. They also show good hole diameter
uniformity over the active area.
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2015 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC)
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