Studies with a Liquid Argon Time Projection Chamber

Schenk, Michael

doi:10.1007/978-3-658-09430-0

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Directional Modulation Of Recombination For Highly Ionizing ...1

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2017

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“…The fraction of the electron-ion pairs surviving recombination has been studied as a function of the particle stopping power dE/dx at different angles, φ, between track direction and electric field, for an incoming energy in the range from 50 MeV to 250 MeV. The residual charge after recombination (measured in units of electron charge) and the energy deposited per unit track length in such a detector are related by the following equation [21]: where W i = 23.6 eV is the average energy per ionized electron. Following ref.…”

Section: Directional Modulation Of Recombination For Highly Ionizing ...mentioning

confidence: 99%

Directional modulation of electron-ion pairs recombination in liquid argon

Cataudella¹,

Candia²,

Filippis³

et al. 2017

J. Inst.

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Motivated by the ongoing study of a possible directional signal in liquid argon dark matter detectors, we introduce a new model describing the recombination of electron-ion pairs in ionizing tracks in liquid argon in the presence of a drift field. The emphasis is on the three-dimensional distribution of electrons and ions and on their orientation relative to that of the electric field. We successfully apply our model to describe the angular dependence of the ionization signal of protons recently reported in measurements performed by the ArgoNeuT Collaboration with a liquid argon time projection chamber.

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Section: Directional Modulation Of Recombination For Highly Ionizing ...mentioning

confidence: 99%