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Question NEGATIVE ION DRIFT IN ELECTRIC FIELD, in TPC 

Keywords: NEGATIVE ION DRIFT
Forum: Fast Simulation, Transportation & Others
Date: 07 Dec, 2004
From: Chamkaur Ghag <Chamkaur Ghag>

Can GEANT4 handle negative ion drift? I mean, if an incoming particle causes a recoil and ionisation along a track in a time projection chamber, normally the electrons would drift to the readout in an electric field. However, in a gas such as carbon disulphide, the electrons from the ionisation can attach themselves to the CS2 to form negative ions, CS2-, and drift with less diffusion. In an area of high field near the readout detector, the electrons detach from the CS2- and normal avalanche occurs. Can GEANT4 handle drifting of electrons in the E-field; can it handle attaching electrons to CS2; can CS2- ions be drifted; can the electrons detach; can the electrons avalanche in high E-field?

I hope someone can answer this for me.

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