- 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
PMID695132
ABSTRACT
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.
MATERIALS
Product Number
Brand
Product Description
Carbon, foil, 10x10mm, thickness 2.0mm, hOpg
Carbon, foil, 100x100mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, foil, 100x100mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 100x100mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 100x100mm, thickness 0.35mm, flexible graphite, 99.8%
Carbon, foil, 100x100mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 100x100mm, thickness 1.0mm, flexible graphite, 99.8%
Carbon, foil, 100x100mm, thickness 0.5mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 50x50mm, thickness 0.1mm, pyrolytic graphite, 99.99%
Carbon, foil, 50x50mm, thickness 0.5mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 300x300mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 100x100mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 12.5x12.5mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 50x50mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 25x25mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 150x150mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 4mm disks, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 150x150mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 250x250mm, thickness 1.0mm, flexible graphite, 99.8%
Carbon, foil, 50mm disks, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 2.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 50x50mm, thickness 0.25mm, rigid graphite, fine grain size, 99.997%
Carbon, foil, 25mm disks, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 150x150mm, thickness 1.0mm, flexible graphite, 99.8%
Carbon, foil, 6mm disks, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 5x10mm, thickness 2.0mm, hOpg