DocumentCode :
2683597
Title :
Microwave measurements from a gyrotron operating with a neutralizing background plasma
Author :
Kirkpatrick ; Gold, Steven H. ; Ting, A.C. ; Manheimer, A.K. ; Kinkead, A.K. ; Hardesty, D.L. ; Killian, K.W. ; Sucy, M.
fYear :
1990
fDate :
21-23 May 1990
Firstpage :
136
Lastpage :
137
Abstract :
Summary form only given. A high-power gyrotron oscillator experiment that utilizes a neutralizing background plasma has been conducted. A background plasma was injected into a gyrotron interaction region from an upstream array of plasma guns. The peak plasma density available from the plasma guns exceeded np>1013 cm-3. The plasma density was measured by 70-GHz microwave interferometry and Langmuir probes. A high-current annular electron beam from a field emission electron gun entered the plasma-filled gyrotron cavity from the upstream side. In the presence of the background plasma, electron beam currents in excess of 10 kA transiting the gyrotron cavity region have been measured. The gyrotron cavity is designed for the excitation of the TE62 electromagnetic mode at f=35 GHz. Computer simulations indicate that powers in excess of 1 GW may be possible. The density of the neutralizing plasma is varied by changing the delay between the firing of the plasma guns and the VEBA accelerator
Keywords :
gyrotrons; microwave measurement; microwave oscillators; plasma density; plasma diagnostics; 1 GW; 10 kA; 35 GHz; 70 GHz; Langmuir probes; TE62 electromagnetic mode; VEBA accelerator; electron beam currents; field emission electron gun; gyrotron; gyrotron cavity; gyrotron interaction region; high-current annular electron beam; microwave interferometry; microwave measurements; neutralizing background plasma; plasma density; plasma-filled gyrotron cavity;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Plasma Science, 1990. IEEE Conference Record - Abstracts., 1990 IEEE International Conference on
Conference_Location :
Oakland, CA, USA
Type :
conf
DOI :
10.1109/PLASMA.1990.110646
Filename :
5725920
Link To Document :
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