Further studies on the gain properties of a Gas Electron Multiplier with a Micro-Induction Gap Amplifying Structure (GEM-MIGAS) aimed at low-energy X-ray detection
✍ Scribed by J.A. Mir; R. Stephenson; N.J. Rhodes; E.M. Schooneveld; H. Natal da Luz; J.F.C.A. Veloso; J.M.F. Dos Santos; C.D.R. Azevedo
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 258 KB
- Volume
- 580
- Category
- Article
- ISSN
- 0168-9002
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✦ Synopsis
A Gas Electron Multiplier with Micro-Induction Gap Amplifying Structure (GEM-MIGAS) is formed when the induction gap of the GEM is set between 50 and 100 mm using kapton pillars spaced at regular intervals. This configuration combines the properties of a GEM and Micromegas, allowing operation in tandem to generate high charge gains. We measured the essential operational parameters of this system using argon-isobutane (IB) and helium-IB gas mixtures. The present short induction gap GEM was able to achieve effective gains exceeding 2 Â 10 4 using argon-IB and 10 5 using helium-IB mixtures. In view of the high gains achieved, particularly when using heliumbased gas mixtures, these studies confirmed the possibility of using the present system for high-performance sub-keV X-ray detection.