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Radiation damage due to knock-on processes on carbon foils cooled to liquid helium temperature.

Radiation damage due to knock-on processes on carbon foils cooled to liquid helium temperature.

Ultramicroscopy (1978-01-01)

I Dietrich, F Fox, H G Heide, E Knapek, R Weyl

摘要

Radiation damage on a holey carbon foil was investigated in an electron microscope with a superconducting lens system, where the temperature of the specimen and its environment initially was 4 K. Due to an electron dose of 2 X 10(4) As/cm2 the diameter of a hole increased 5 nm. Rough calculations show that this increase can be ascribed to knock-on processes. Estimates of the rise in specimen temperature during the irradiation are given.

材料

Product Number

品牌

产品描述

碳, foil, 10x10mm, thickness 2.0mm, hOpg

碳, foil, 50x50mm, thickness 0.2mm, pyrolytic graphite, 99.99%

碳, foil, 100x100mm, thickness 0.5mm, flexible graphite, 99.8%

碳, foil, 5x5mm, thickness 2.0mm, hOpg

碳, foil, 50x50mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.5mm, pyrolytic graphite, 99.99%

碳, foil, 50x50mm, thickness 0.1mm, pyrolytic graphite, 99.99%

碳, foil, 5x10mm, thickness 2.0mm, hOpg

碳, foil, not light tested, 100x100mm, thickness 0.075mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.1mm, pyrolytic graphite, 99.99%

碳, foil, 100x100mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 150x150mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%

碳, foil, 15x15mm, thickness 2.0mm, hOpg

碳, foil, 4mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%

碳, foil, 50x50mm, thickness 1.0mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%

碳, foil, 100x100mm, thickness 1.0mm, flexible graphite, 99.8%

碳, foil, 250x250mm, thickness 0.5mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 0.35mm, flexible graphite, 99.8%

碳, foil, 6mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 50x50mm, thickness 0.5mm, flexible graphite, 99.8%

碳, foil, 100x100mm, thickness 2.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%

碳, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 50mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 8mm disks, thickness 0.2mm, flexible graphite, 99.8%

碳, foil, 25x25mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%

碳, foil, 25x25mm, thickness 0.5mm, rigid graphite, fine grain size, 99.997%