Abstract
Data on ion mobility is important to improve the performance of large volume gaseous detectors. In the present work the method, experimental setup and results for the ion mobility measurements in Xe-CO2 mixtures are presented. The results for this mixture show the presence of only one peak for all gas ratios of Xe-CO2, low reduced electric fields, E/N, 10-25 Td (2.4-6.1 kV·cm−1·bar−1), low pressures 6-8 Torr (8-10.6 mbar), at room temperature.
Highlights
- Experimental ion mobility measurements in Ar-CO2 mixtures P M C C Encarnação, A F V Cortez, M G A Pinto et al
One important feature of the system is the capability of controlling the voltage across the GEM (VGEM), which limits the maximum energy gained by the electrons as they move across the GEM holes, narrowing the variety of possible primary ions produced
The mobility of the ions originated in Xe-CH4 mixtures has been measured for different reduced electric fields E/N, at 8 Torr pressure and at room temperature (293 K)
Summary
- Experimental ion mobility measurements in Ar-CO2 mixtures P M C C Encarnação, A F V Cortez, M G A Pinto et al. The method, experimental setup and results for the ion mobility measurements in Xe-CH4 mixtures are presented. The results for this mixture show the presence of two distinct groups of ions. Under a weak and uniform electric field a group of ions will eventually reach a steady state. In this conditions, the average velocity of this group of ions, known as drift velocity vd, is proportional to the electric field intensity [4]: vd = KE (1.1)
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