High-Temperature Observation of Tungsten Cathode by Field Emission Microscope
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概要
- 論文の詳細を見る
Emission patterns of tungsten single crystal were observed at high temperature by using Muller-type field emission microscope having an oil diffusion pump and a rotary pump. As a result, we could obtain two kinds of patterns, namely, "high-temperature pattern" which appeared after heat treatment at temperatures higher than 2200°K, and "low-temperature pattern" which appeared after heat treatment at temperatures lower than 2200°K. Introducing a small quantity of oxygen, it was confirmed that the high-temperature pattern was due to carbon-adsorbed surface. As for the low-temperature pattern which has six-fold symmetry, it was conjectured from a few considerations of the experimental results that it might be a pattern of tungsten carbide.
- 社団法人応用物理学会の論文
- 1965-05-15
著者
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Okuyama Fumio
Research Institute For Scientific Measurements
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Okuyama Fumio
Research Institute For Scientific Measurements Tohoku University
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HIBI Tadatosi
Research Institute for Scientific Measurements
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