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Digitale Medien

A vertical positron beam for low-temperature surface studies (1987)

Rice-Evans, P. C. ; Britton, D. T. ; Cowan, B. P.

Springer

Applied physics 43 (1987), S. 283-285

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Details

ISSN: 1432-0630

Schlagwort(e): 78.70B

Quelle: Springer Online Journal Archives 1860-2000

Thema: Maschinenbau , Physik

Notizen: Abstract A cryostat system incorporating a low-energy positron beam for surface measurements down to Temperatures below 2 K is currently under construction at the Royal Holloway and Bedford New College. The positron beam has recently been brought into operation and its operating characteristics have been evaluated. Positrons from a22Na source are converted with an efficiency of ε=2×10−4 and transported magnetically at 1.5 V above the work function to a target at the bottom of a cryostat. The transmission of a 7 mm diameter beam is found to be constant over a range of axial field strengths from 40 to 50 G.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00635184

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