SPECTROSCOPIC STUDIES OF ARCS

被引:5
作者
BODDY, PJ
NASH, DL
机构
[1] Bell Telephone Laboratories, Inc., Murray Hill
来源
IEEE TRANSACTIONS ON PARTS MATERIALS AND PACKAGING | 1969年 / PMP5卷 / 04期
关键词
D O I
10.1109/TPMP.1969.1136072
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Emission in the near ultraviolet from transient arcs between gold electrodes breaking resistive circuits carrying currents in the range 0.8–1.75 amperes was studied. Analysis of the intensities of the AuI lines was carried out in terms of a model involving two distinct zones, a relatively large zone at ~6000°K (the positive column) and a zone at an apparent temperature of ~23 000°K (identified with a region close to the cathode surface), which is 3–4 orders of magnitude smaller in volume. There is intense emission from the second positive system of N2. Analysis of the rotational fine structure of the (0, 0) band also yields a temperature of ~6000°K. Estimation of the electron density (~3 X 1014 cm-3) and the assumption of thermal equilibrium in the positive column allows one to calculate (N+/N0)Au = 3 X 10-2 from Saha's equation. From this it follows that the relative vapor pressure of gold in the positive column is ~0.0025 atmosphere, assuming electroneutrality in the plasma. An estimate based on simple gas-kinetic considerations of the loss of gold atoms from the plasma column to the surrounding atmosphere and to the anode is within a factor of 4 of the loss observed in practice. © 1969, IEEE. All rights reserved.
引用
收藏
页码:179 / +
页数:1
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