High-pressure dc glow discharges in hollow diamond cathodes
High-pressure dc glow discharges in hollow diamond cathodes
复制标题
空心金刚石阴极中的高压直流辉光放电
DOI:
10.1088/0963-0252/25/2/025005
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发表时间:
2016
影响因子:
3.8
通讯作者:
Truscott B
中科院分区:
文献类型:
--
作者:
Truscott B
We report the generation and characterization of dc helium microdischarges at several times atmospheric pressure in monolithic diamond hollow-cathode devices having cavity diameters on the order of 100 μm. I–V characteristics indicated operation in the glow discharge regime even at nearly 10 atm, while spectroscopic measurements of the N 2 C 3 Π u→ B 3 Π g emission returned rotational temperatures always around 420 K, with a pressure-dependent vibrational population distribution. The variation of breakdown voltage with pressure closely followed Paschen's law, but with offsets in both axes that we tentatively ascribe to strong diffusive loss and a partial thermalization of electron energies under the high pressures considered here.
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