2 papers
physics.ins-det2004
Negative Ion Drift and Diffusion in a TPC near 1 Bar
C. J. Martoff, R. Ayad, M. Katz-Hyman +2
Drift velocity and longitudinal diffusion measurements are reported for a Negative Ion TPC (NITPC) operating with Helium + carbon disulfide gas mixtures at total pressures from 160…
physics.ins-det2003
GEM Operation in Negative Ion Drift Gas Mixtures
J. Miyamoto, I. Shipsey, C. J. Martoff +4
The first operation of GEM gas gain elements in negative ion gas mixtures is reported. Gains up to several thousand were obtained from single-stage GEMs in carbon disulfide vapor a…