Dynamics of the ions in Liquid Argon Detectors and electron signal quenching
arXiv:1609.08984 · doi:10.1016/j.astropartphys.2017.04.002
Abstract
A study of the dynamics of the positive charges in liquid argon has been carried out in the context of the future massive time projection chambers proposed for dark matter and neutrino physics. Given their small mobility coefficient in liquid argon, the ions spend a considerably longer time in the active volume with respect to the electrons. The positive charge density can be additionally increased by the injection, in the liquid volume, of the ions produced by the electron multiplying devices located in gas argon. The impact of the ion current on the uniformity of the field has been evaluated as well as the probability of the charge signal quenching due to the electron-ion recombination along the drift. The study results show some potential concerns for massive detectors with drift of many meters operated on surface.
Submitted to Astroparticle Physics
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Cited by in corpus (7)
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- Space charge in liquid argon time-projection chambers: a review of analytical and numerical models, and mitigation methods
- Charge and Light Production in the Charge Readout System of a Dual Phase LAr TPC
- Impact of the positive ion current on large size neutrino detectors and delayed photon emission
- Space Charge Effects in Noble Liquid Calorimeters and Time Projection Chambers
- AVOLAR. A high voltage generator for liquid argon time projection chambers
- Experimental study of the positive ion feedback from gas to liquid in a dual-phase argon chamber and measurement of the ion mobility in argon gas