Electron‐Beam Excitation of the Nitrogen Laser
作者:
R. W. Dreyfus,
R. T. Hodgson,
期刊:
Applied Physics Letters
(AIP Available online 1972)
卷期:
Volume 20,
issue 5
页码: 195-197
ISSN:0003-6951
年代: 1972
DOI:10.1063/1.1654105
出版商: AIP
数据来源: AIP
摘要:
Stimulated emission near 3371 Å is reported for the first time using a commercial electron‐beam generator as an energy source. A 2 × 103‐A/cm23‐nsec pulse of 400‐keV electrons from a field‐emission diode traveled 160 cm down a ¾‐in. tube containing N2at pressures of 10–50 Torr. A longitudinal magnetic field of 2–10 kG helped confine the electrons in the tube. The 400‐keV electrons produce secondary and subsequent cascade electrons with energies from 0–200 keV. Those electrons with 13–17 eV excite nitrogen molecules to the upper lasing (C3&Pgr;u) state. Sufficient concentration of excited nitrogen molecules is produced for the gas to show superradiance with 60 kW of light output power.
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