skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications

Abstract

To address the electron cyclotron heating requirements of planned fusion experiments such as the International Thermonuclear Experimental Reactor (ITER) and the Compact Ignition Tokamak (CIT), Varian is developing gyrotrons at frequencies ranging from 100--300 GHz with output power capabilities up to 1 MW CW. Experimental gyrotrons have been built at frequencies between 100--140 GHz, and a study program has addressed the critical elements of designing 280--300 GHz gyrotrons capable of generating CW power levels up to 1 MW. 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 1040 kW at 38% efficiency have been obtained and average powers of 200 kW have been achieved. Long-pulse operation has been extended to pulse durations of 0.5 seconds at power levels of 400 kW. Gyrotron oscillators capable of generating output powers of 500 kW CW at a frequency of 110 GHz have recently been designed and a prototype is currently being tested. Design work for a 1 MW CW gyrotron at 110 GHz, is in progress. The 1 MW CW tube will employmore » an output coupling approach where the microwave output is separated from the microwave output. 15 refs., 10 figs., 3 tabs.« less

Authors:
; ; ; ; ; ; ;  [1]
  1. (Varian Associates, Inc., Palo Alto, CA (USA))
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA); Varian Associates, Inc., Palo Alto, CA (USA)
Sponsoring Org.:
DOE/ER
OSTI Identifier:
6299008
Report Number(s):
UCRL-CR-104479
ON: DE91005425; TRN: 91-001441
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; MEGAWATT POWER RANGE; MICROWAVE RADIATION; SUPERCONDUCTING MAGNETS; TESTING; AMPLIFIERS; CURRENTS; ELECTRICAL EQUIPMENT; ELECTROMAGNETIC RADIATION; ELECTROMAGNETS; ELECTRONIC EQUIPMENT; EQUIPMENT; HEATING; HIGH-FREQUENCY HEATING; MAGNETS; MICROWAVE EQUIPMENT; PLASMA HEATING; POWER RANGE; RADIATIONS; SUPERCONDUCTING DEVICES; 700205* - Fusion Power Plant Technology- Fuel, Heating, & Injection Systems

Citation Formats

Jory, H., Felch, K., Hess, C., Huey, H., Jongewaard, E., Neilson, J., Pendleton, R., and Tsirulnikov, M. Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications. United States: N. p., 1990. Web. doi:10.2172/6299008.
Jory, H., Felch, K., Hess, C., Huey, H., Jongewaard, E., Neilson, J., Pendleton, R., & Tsirulnikov, M. Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications. United States. doi:10.2172/6299008.
Jory, H., Felch, K., Hess, C., Huey, H., Jongewaard, E., Neilson, J., Pendleton, R., and Tsirulnikov, M. Mon . "Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications". United States. doi:10.2172/6299008. https://www.osti.gov/servlets/purl/6299008.
@article{osti_6299008,
title = {Millimeter-wave, megawatt gyrotron development for ECR (electron cyclotron resonance) heating applications},
author = {Jory, H. and Felch, K. and Hess, C. and Huey, H. and Jongewaard, E. and Neilson, J. and Pendleton, R. and Tsirulnikov, M.},
abstractNote = {To address the electron cyclotron heating requirements of planned fusion experiments such as the International Thermonuclear Experimental Reactor (ITER) and the Compact Ignition Tokamak (CIT), Varian is developing gyrotrons at frequencies ranging from 100--300 GHz with output power capabilities up to 1 MW CW. Experimental gyrotrons have been built at frequencies between 100--140 GHz, and a study program has addressed the critical elements of designing 280--300 GHz gyrotrons capable of generating CW power levels up to 1 MW. 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 1040 kW at 38% efficiency have been obtained and average powers of 200 kW have been achieved. Long-pulse operation has been extended to pulse durations of 0.5 seconds at power levels of 400 kW. Gyrotron oscillators capable of generating output powers of 500 kW CW at a frequency of 110 GHz have recently been designed and a prototype is currently being tested. Design work for a 1 MW CW gyrotron at 110 GHz, is in progress. The 1 MW CW tube will employ an output coupling approach where the microwave output is separated from the microwave output. 15 refs., 10 figs., 3 tabs.},
doi = {10.2172/6299008},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Sep 17 00:00:00 EDT 1990},
month = {Mon Sep 17 00:00:00 EDT 1990}
}

Technical Report:

Save / Share: