Title of article
A benign, low electron capture agent for negative ion TPCs
Author/Authors
Martoff، نويسنده , , C.J. and Dion، نويسنده , , M.P. and Hosack، نويسنده , , M. and Barton، نويسنده , , D. and Black، نويسنده , , J.K.، نويسنده ,
Pages
4
From page
501
To page
504
Abstract
We have identified nitromethane ( CH 3 NO 2 ) as an effective electron capture agent for negative ion TPCs (NITPCs). We present drift velocity and longitudinal diffusion measurements for negative ion gas mixtures using nitromethane as the capture agent. Not only is nitromethane substantially more benign than the only other identified capture agent, CS 2 , but its low atomic number will enable the use of the NITPC as a photoelectric X-ray polarimeter in the 1–10 keV band.
Keywords
negative ion , Dark matter , X-ray polarimeter , diffusion , ion mobility
Journal title
Astroparticle Physics
Record number
2025990
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