Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Review of Scientific Instruments
61 (1990), S. 42-48
ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
We have recently built a spectrometer that efficiently collects the energy spectrum of charged particles that emerge from targets bombarded by low-flux (10−15 A) incident beams. The spectrometer is used to detect positron-induced secondary electrons and low-energy positron-stimulated Auger electron emission. Slow positrons and positron-induced secondary electrons are generated from a cold neon positron moderator deposited onto an encapsulated 22Na source. The moderated beam is magnetically transported to the target with two sets of E×B plates. The particles emerging from the target are energy dispersed by a third set of plates and are detected with a one-dimensional position-sensitive detector. The data-collection rate for the energy-distribution spectrum is ∼10–100 times faster for this experiment relative to the more common method of sweeping grids or the plates.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1141262
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