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Author Blackman, M. ♦ Curzon, A. E. ♦ Pawlowicz, A. T.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ COILS ♦ CYLINDERS ♦ DETECTION ♦ DIFFRACTION ♦ ELECTRON BEAMS ♦ ENERGY RANGE ♦ IMPURITIES ♦ LEAD ♦ LENSES ♦ MAGNETIC FIELDS ♦ MEASURED VALUES ♦ PERFORMANCE ♦ SUPERCONDUCTIVITY ♦ THICKNESS ♦ TRANSIENTS ♦ USES
Abstract An electron beam technique is described for detecting superconducting domains in lead. A spectroscopically pure cylinder of lead, 1.1 cm long and 0.28 cm in diameter was mounted with its axis vertical in a modified horizontal electron diffraction camera. A 20 kv electron beam was focused about 15 cm from the cylinder and was deflected at 50 c/s in a vertical direction by means of suitable coils, so as to produce an electron shadow of the lead cylinder. A smooth electron shadow was taken after the applied field had been increased from zero to 37 Oe. When the field was further increased to 40 Oe the shadow edge ceased to be smooth. It became smooth again for fields in excess of about 50 Oe. (P.C.H.)
Educational Use Research
Learning Resource Type Article
Publisher Date 1963-10-12
Publisher Department Imperial Coll. of Science and Tech., London
Journal Nature
Volume Number 200
Organization Imperial Coll. of Science and Tech., London


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