Measurements and calculations of gas gain in Xe-5% TMA mixture-pressure scaling
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Date
2018-10
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IOP Publishing
Abstract
In this work we present both experimental and theoretical investigation of gas gains measured in single anode wire cylindrical counters filled with Xe + 5% TMA (trimethylamine) for the mixture pressures between 250 hPa and 1800 hPa. We observed stable operation at all pressures up to the maximum gas gain values as high as 10(3) (10(4)) at 250 (1800) hPa. The experimental gas gain data have been fitted with the output of Magboltz software to investigate additional ionizations, developing in avalanche formations, due to Penning energy transfers and secondary processes (feedback). Calculations manifest that the choice of TMA as a quench gas have a significant effect on the reachable gas gain. The obtained results are expected to be favourable for micromegas-TPC operating in Xe-TMA mixture.
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Keywords
Instruments & instrumentation, Gaseous detectors, Detector modelling and simulations II (electric fields, charge transport, multiplication and induction, pulse formation, electron emission, etc), Avalanche-induced secondary effects, Ionization, Reconstruction, Diffusion, Drift, Electric fields, Electron emission, Energy transfer, Ionization of gases, Mixtures, Avalanche formation, Gaseous detectors, Modelling and simulations, Secondary process, Single-anode, Stable operation, Trimethylamine, Theoretical investigations, Gases
Citation
Şahin, Ö. ve Kowalski, T. Z. (2018). ''Measurements and calculations of gas gain in Xe-5% TMA mixture-pressure scaling''. Journal of Instrumentation, 13.