基本信息:
- 专利标题： PLASMA-ASSISTED HIGH-POWER MICROWAVE GENERATOR
- 专利标题（中）：BY PLAMSMAUNTERSTÜZTER高性能微波发生器。
- 申请号：EP89907396.9 申请日：1989-03-06
- 公开(公告)号：EP0364574B1 公开(公告)日：1994-06-22
- 发明人： SCHUMACHER, Robert, W. , HYMAN, Julius, Jr. , HARVEY, Robin, J. , SANTORU, Joseph
- 申请人： Hughes Aircraft Company
- 申请人地址： 7200 Hughes Terrace P.O. Box 45066 Los Angeles, California 90045-0066 US
- 专利权人： Hughes Aircraft Company
- 当前专利权人： Hughes Aircraft Company
- 当前专利权人地址： 7200 Hughes Terrace P.O. Box 45066 Los Angeles, California 90045-0066 US
- 代理机构： KUHNEN, WACKER & PARTNER
- 优先权： US181279 19880414
- 国际公布： WO8910000 19891019
- 主分类号： H01J25/00
- IPC分类号： H01J25/00
摘要：
A high-power microwave/mm-wave oscillator is filled with an ionizable gas at a pressure of about 1-20 mTorr, into which an electron beam (34) is injected at a high current density of at least about 1 amp/cm2, but typically 50-100 A/cm2. A plasma is formed which inhibits space-charge blowup of the beam, thereby eliminating the prior requirement of a magnet system to control the beam. The system functions as a slow-wave tube to produce narrow-band microwaves for a gas pressure of about 1-5 mTorr, and as a plasma wave tube to produce broadband microwave/mm-wave radiation for a gas pressure of about 10-20 mTorr. A new high output, hollow-cathode-plasma electron gun is employed in which a metal oxide layer is formed on the inner surface to enhance the secondary electron yield; a cathode (2), grid (4), and extraction anode (12) have respective sets of multiple apertures (30) which are mutually aligned to yield a high perveance beam; the cathode, grid, and anode are curved to geometrically focus the beam, and a beam with a circular cross-section is generated.