Development of a supersonic O(3PJ), O(1D2) atomic oxygen nozzle beam source
Development of a supersonic O(3PJ), O(1D2) atomic oxygen nozzle beam source
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超音速O(3PJ)、O(1D2)原子氧喷嘴束源的研制
DOI：
10.1063/1.1136170
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发表时间：
1980
影响因子：
1.6
通讯作者：
Yuan‐Pern Lee
中科院分区：
文献类型：
--
作者：
S. Sibener;R. Buss;C. Ng;Yuan‐Pern Lee
已经开发了一种高压，射频放电喷嘴光束源，用于产生非常强烈（大于等于1018个原子sr−1 s−1）的氧原子超音速光束。设计了一种有效的阻抗匹配方案，将射频功率耦合到氧稀有气体混合物中，作为气体压力、温度和成分的函数。一种特殊设计的石英喷嘴的孔后直接定位放电的技术也得到了发展。上述组合产生的光束源，在高达350托的压力下，在氧-稀有气体混合物中可靠地产生高度的分子解离。利用种子束技术，原子氧平均平动能达到0.14 ~ 0.50 eV，马赫数达到10。当氦被用作载气时，O（3PJ）和O（1D2）原子都存在于光束中，而只有基态原子似乎存在于氩气种子混合物中。本文介绍了该系统的设计、结构和结构特点。
A high pressure, radio frequency discharge nozzle beam source has been developed for the production of very intense (⩾1018 atoms sr−1 s−1) supersonic beams of oxygen atoms. An efficient impedance matching scheme has been devised for coupling the radio frequency power to oxygen–rare gas mixtures as a function of gas pressure, temperature, and composition. Techniques for localizing the discharge directly behind the orifice of a specially designed quartz nozzle have also been developed. The above combine to yield a beam source which reliably produces a high degree of molecular dissociation in oxygen–rare gas mixtures at pressures up to 350 Torr. Atomic oxygen mean translational energies from 0.14–0.50 eV have been achieved using the seeded beams technique with Mach numbers up to 10 being realized. When helium is used as the carrier gas both O(3PJ) and O(1D2) atoms are present in the beam, while only ground state atoms appear to be present in argon seeded mixtures. This paper describes the design, constructi...