Mar 23 – 27, 2020
Brooklyn, NY
US/Eastern timezone

Ion Back Flow Suppression From a Passive Gating Grid

Not scheduled
20m
Brooklyn, NY

Brooklyn, NY

333 Adams Street, Brooklyn, New York 11201, USA
Poster Poster Session Poster Session

Speaker

Vladislav Zakharov (Stony Brook University & BNL)

Description

Future high luminosity experiments, such as sPHENIX or any EIC detector, will greatly benefit from the use of a Time Projection Chamber (TPC) as one of its main tracking systems. A TPC’s ability to measure space points of charged tracks makes it an excellent detector for the desired resolution in momentum and energy loss dE/dx. The resolution is limited by distortions from Space Charge (SC) in the drift volume, and the main contribution to SC is from ions created in the amplification stage. Reducing SC is thus done through suppressing the Ion Back Flow (IBF) coming from the gain area. We are studying this suppression using a bi-polar gating grid. Past experiments have successfully used active grids, but we are exploring a passive grid in a magnetic field in order to allow high electron transparency while maintaining low ion transparency. Furthermore, I’ll discuss the position distortion of electrons, which results from moving along the bi-polar wire, and our strategy to compensate for these non-linear responses by pre-distorting our unique Zig-Zag readout pads.

Primary authors

Vladislav Zakharov (Stony Brook University & BNL) Prakhar Garg (Stony Brook University) Thomas Hemmick (Stony Brook University) Klaus Dehmelt (Stony Brook University) Alexander Milov (Weizmann Institute of Science) Evgeny Shulga (Weizmann Institute of Science)

Presentation materials

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