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作者曾对CuBe合金打拿极在电子束作用下氧化被分解进行了俄歇电子谱(AES)分析,本文是这方面工作的继续。通过在PHI595扫描俄歇多探针与PHI3500二次离子质谱联合谱仪上进行的大量实验,测出了电子能量为2KeV、3KeV和5KeV的氧化铍分解截面,分别是5.02×10~(-23)cm~2,4.29×10~(-22)cm~2和2.05×10~(-22)cm~2。在表面上有碳污染时,分解截面下降很大,例如降到清洁表面的四分之一。用所得实验结果解释了以CuBe合金为打拿极的电子倍增器增益下降的规律。
The author of the CuBe alloy dode the role of electron beam oxidation was decomposed by Auger electron spectroscopy (AES) analysis, this article is the continuation of this work. A large number of experiments on PHI595 scanning Auger probe and PHI3500 secondary ion mass spectrometer were used to determine the decomposition area of beryllium oxide with electron energies of 2KeV, 3KeV and 5KeV, which were 5.02 × 10 ~ (-23 ) cm ~ 2,4.29 × 10 ~ (-22) cm ~ 2 and 2.05 × 10 ~ (-22) cm ~ 2, respectively. When there is carbon contamination on the surface, the decomposition cross-section drops significantly, for example down to a quarter of the cleaning surface. The experimental results obtained show that the gain of electron multiplier with CuBe alloy as the dynode decreases.