Everhart, T. E. and Thornley, R. F. M. (1960) Wide-band detector for micro-microampere low-energy electron currents. Journal of Scientific Instruments, 37 (7). pp. 246-248. ISSN 0950-7671. http://resolver.caltech.edu/CaltechAUTHORS:EVEjsi60
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Electrons with a mean energy of a few electron volts emerging from a source a few millimetres in diameter are accelerated on to a positively biased plastic scintillator. The light generated in the scintillator is guided by a Perspex light-pipe to a photomultiplier. If the scintillator bias is greater than 10 kV, no noise is introduced by the scintillator-light-pipe-photomultiplier system. If the original electron signal is modulated, the maximum modulation frequency transmitted by the system is greater than 10 Mc/s. The minimum detectable current is limited by the photomultiplier dark current, and may be less than 10^-15 A with a suitably chosen tube.
|Additional Information:||Copyright © 1960 Institute of Physics. Paper received 25 January, 1960. We wish to express our thanks to our supervisor, Mr. C.W. Oatley, for much useful advice and encouragement. One of us (T.E.E.) was supported by a Marshall Scholarship, while the other (R.F.M.T.) was in receipt of a D.S.I.R. Research Studentship.|
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|Last Modified:||26 Dec 2012 10:26|
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