Title :
An estimate of the accuracy achievable in time projection chambers with low mass gases
Author_Institution :
Dipartimento de Fisica, Istituto Nazionale di Fisica Nucl., Torino, Italy
Abstract :
The use of low mass gases for time projection chambers is discussed particularly for low momentum particles (below 1 GeV/c); some helium and neon based mixtures have been found to be quite adequate for the operation of the devices. The drift velocity and diffusion characteristics of these mixtures are calculated and compare well with measurements; a larger diffusion as compared to standard argon-methane mixtures, is found to be compensated for by a small Lorentz angle and smaller multiple scattering
Keywords :
gas mixtures; helium; neon; time projection chambers; He based mixtures; Lorentz angle; Ne based mixtures; accuracy; diffusion characteristics; drift velocity; low mass gases; low momentum particles; multiple scattering; standard argon-methane mixtures; time projection chambers; Electrons; Gases; Helium; Length measurement; Light scattering; Magnetic field measurement; Particle scattering; Spatial resolution; Velocity measurement; Wire;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.504318
