Characterization of microbulk detectors in argon- and neon-based mixtures

Details Characterization of microbulk detectors in argon- and neon-based mixtures Characterization of microbulk detectors in argon- and neon-based mixtures

2012-01-14

arxiv.org/abs/1201.3012v1

Physics

Instrumentation and Detectors

Submitted to the Journal of Instrumentation

Scientific paper

A recent Micromegas manufacturing technique, so called Microbulk, has been developed, improving the uniformity and stability of this kind of detectors. Excellent energy resolutions have been obtained, reaching values as low as 11% FWHM at 5.9 keV in Ar+5%iC4H10. This detector has other advantages like its flexible structure, low material budget and high radio-purity. Two microbulk detectors with gaps of 50 and 25 um have been characterized in argon- and neon-based mixtures with ethane, isobutane and cyclohexane. The results will be presented and discussed. The gain curves have been fitted to the Rose-Korff gain model and dependences of the electron mean free path and the threshold energy for ionization have been obtained. The possible relation between these two parameters and the energy resolution will be also discussed.

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