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Title: Progress in producing megawatt gyrotrons for ECR (electron cyclotron resonance) heating

Abstract

Varian is carrying out the development of high-power, CW gyrotrons at frequencies ranging from 100--500 GHz for use in electron cyclotron resonance (ECR) heating of magnetically-confined plasma. Initial test vehicles at 140 GHz have utilized TE{sub 15,2,1} interaction cavities, and have been designed to generate short-pulse (up to 20 ms) power levels of 1 MW and up to 400 kW CW. Recently, short-pulse power levels of 940 kW at 35% efficiency have been obtained and average powers of 200 kW have been achieved at peak powers of 400 kW. Long-pulse testing is currently underway. Initial test have resulted in output levels of 400 kW for pulse durations of 380 ms. Design work on 110 GHz, 500 kW CW gyrotron oscillators has recently been completed and a prototype tube has been assembled and is currently being tested. The design of a 110 GHz, 1 MW CW gyrotron, using a novel output coupling approach, is nearly complete. Fabrication of the first 1 MW CW experimental tube is in progress.

Authors:
; ; ; ; ; ; ;  [1]
  1. Varian Associates, Inc., Palo Alto, CA (USA)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
6570521
Report Number(s):
UCRL-CR-106119
ON: DE91001681; TRN: 90-034496
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; MICROWAVE AMPLIFIERS; DESIGN; BEAM CURRENTS; ECR HEATING; EFFICIENCY; MAGNETIC CONFINEMENT; PERFORMANCE TESTING; PROGRESS REPORT; AMPLIFIERS; CONFINEMENT; CURRENTS; DOCUMENT TYPES; ELECTRONIC EQUIPMENT; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; MICROWAVE EQUIPMENT; PLASMA CONFINEMENT; PLASMA HEATING; TESTING; 700205* - Fusion Power Plant Technology- Fuel, Heating, & Injection Systems

Citation Formats

Felch, K, Hess, C, Huey, H, Jongewaard, E, Jory, H, Neilson, J, Pendleton, R, and Tsirulnikov, M. Progress in producing megawatt gyrotrons for ECR (electron cyclotron resonance) heating. United States: N. p., 1990. Web. doi:10.2172/6570521.
Felch, K, Hess, C, Huey, H, Jongewaard, E, Jory, H, Neilson, J, Pendleton, R, & Tsirulnikov, M. Progress in producing megawatt gyrotrons for ECR (electron cyclotron resonance) heating. United States. https://doi.org/10.2172/6570521
Felch, K, Hess, C, Huey, H, Jongewaard, E, Jory, H, Neilson, J, Pendleton, R, and Tsirulnikov, M. 1990. "Progress in producing megawatt gyrotrons for ECR (electron cyclotron resonance) heating". United States. https://doi.org/10.2172/6570521. https://www.osti.gov/servlets/purl/6570521.
@article{osti_6570521,
title = {Progress in producing megawatt gyrotrons for ECR (electron cyclotron resonance) heating},
author = {Felch, K and Hess, C and Huey, H and Jongewaard, E and Jory, H and Neilson, J and Pendleton, R and Tsirulnikov, M},
abstractNote = {Varian is carrying out the development of high-power, CW gyrotrons at frequencies ranging from 100--500 GHz for use in electron cyclotron resonance (ECR) heating of magnetically-confined plasma. Initial test vehicles at 140 GHz have utilized TE{sub 15,2,1} interaction cavities, and have been designed to generate short-pulse (up to 20 ms) power levels of 1 MW and up to 400 kW CW. Recently, short-pulse power levels of 940 kW at 35% efficiency have been obtained and average powers of 200 kW have been achieved at peak powers of 400 kW. Long-pulse testing is currently underway. Initial test have resulted in output levels of 400 kW for pulse durations of 380 ms. Design work on 110 GHz, 500 kW CW gyrotron oscillators has recently been completed and a prototype tube has been assembled and is currently being tested. The design of a 110 GHz, 1 MW CW gyrotron, using a novel output coupling approach, is nearly complete. Fabrication of the first 1 MW CW experimental tube is in progress.},
doi = {10.2172/6570521},
url = {https://www.osti.gov/biblio/6570521}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Oct 01 00:00:00 EDT 1990},
month = {Mon Oct 01 00:00:00 EDT 1990}
}