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Electron avalanche amplification in X-ray imaging devices

1974; IOP Publishing; Volume: 19; Issue: 5 Linguagem: Inglês

10.1088/0031-9155/19/5/001

1361-6560

P N Jeffery, J. W. Boag, H. E. Johns,

Electron and X-Ray Spectroscopy Techniques

The curves of ionization current against voltage have been measured in several gases and gas mixtures at atmospheric pressure under constant irradiation in a parallel-plate chamber in order to determine the conditions required for stable avalanche amplification in narrow gaps. This method of amplifying the charge pattern in an image-forming ion chamber has been proposed by Reiss (1965). Some limitations which are inherent in the use of avalanche amplification are discussed.