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Title: Status of the DIII-D 110 GHz ECH system

Abstract

The DIII-D program is presently commissioning the first MW gyrotron of a planned 3 MW, 110 GHz electron cyclotron heating (ECH) system for off-axis electron heating and current drive. Advanced tokamak (AT) research in DIII-D and other tokamaks requires the ability to control the current density profile. ECH offers the ability to localize the heating and driven current in a controllable manner and is not dependent upon the local plasma conditions; so it appears to be an ideal tool for AT research. The planned rf sources for the DIII-D system are 1 MW state-of-the-art internal mode-converter gyrotrons, with one gyrotron being manufactured by GYCOM, a Russian company, and two gyrotrons being manufactured by CPI (formerly Varian). The GYCOM gyrotron has been tested at the factory to 960 kW, 2 seconds and has been shipped to GA where it is now undergoing initial checkout and testing. The first CPI gyrotron has been assembled and factory tested to 530 kW, 2 seconds and 350 kW, 10 seconds. Both the Gycom and CPI gyrotrons are limited in pulse length at full power by thermal limits on the output window. The second CPI gyrotron is expected to be ready for testing in April 1996.more » This paper will report on the initial experiences of using the GYCOM 1 MW, 110 GHz internal mode-converter gyrotron, at General Atomics, and the observed effects the ECRH power has on the DIII-D plasma. 7 refs., 7 figs., 1 tab.« less

Authors:
; ; ; ;  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
OSTI Identifier:
447375
Report Number(s):
CONF-9606116-
Journal ID: FUSTE8; ISSN 0748-1896; TRN: 97:005349
DOE Contract Number:  
AC03-89ER51114
Resource Type:
Journal Article
Journal Name:
Fusion Technology
Additional Journal Information:
Journal Volume: 30; Journal Issue: 3; Conference: Annual meeting of the American Nuclear Society (ANS), Reno, NV (United States), 16-20 Jun 1996; Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DOUBLET-3 DEVICE; ECR HEATING; DESIGN; MICROWAVE AMPLIFIERS; RF SYSTEMS; PLASMA HEATING; MIRRORS; NUMERICAL DATA

Citation Formats

Callis, R W, Lohr, J, O`Neill, R C, Tooker, J F, and Ponce, D. Status of the DIII-D 110 GHz ECH system. United States: N. p., 1996. Web.
Callis, R W, Lohr, J, O`Neill, R C, Tooker, J F, & Ponce, D. Status of the DIII-D 110 GHz ECH system. United States.
Callis, R W, Lohr, J, O`Neill, R C, Tooker, J F, and Ponce, D. 1996. "Status of the DIII-D 110 GHz ECH system". United States.
@article{osti_447375,
title = {Status of the DIII-D 110 GHz ECH system},
author = {Callis, R W and Lohr, J and O`Neill, R C and Tooker, J F and Ponce, D},
abstractNote = {The DIII-D program is presently commissioning the first MW gyrotron of a planned 3 MW, 110 GHz electron cyclotron heating (ECH) system for off-axis electron heating and current drive. Advanced tokamak (AT) research in DIII-D and other tokamaks requires the ability to control the current density profile. ECH offers the ability to localize the heating and driven current in a controllable manner and is not dependent upon the local plasma conditions; so it appears to be an ideal tool for AT research. The planned rf sources for the DIII-D system are 1 MW state-of-the-art internal mode-converter gyrotrons, with one gyrotron being manufactured by GYCOM, a Russian company, and two gyrotrons being manufactured by CPI (formerly Varian). The GYCOM gyrotron has been tested at the factory to 960 kW, 2 seconds and has been shipped to GA where it is now undergoing initial checkout and testing. The first CPI gyrotron has been assembled and factory tested to 530 kW, 2 seconds and 350 kW, 10 seconds. Both the Gycom and CPI gyrotrons are limited in pulse length at full power by thermal limits on the output window. The second CPI gyrotron is expected to be ready for testing in April 1996. This paper will report on the initial experiences of using the GYCOM 1 MW, 110 GHz internal mode-converter gyrotron, at General Atomics, and the observed effects the ECRH power has on the DIII-D plasma. 7 refs., 7 figs., 1 tab.},
doi = {},
url = {https://www.osti.gov/biblio/447375}, journal = {Fusion Technology},
number = 3,
volume = 30,
place = {United States},
year = {Tue Dec 31 00:00:00 EST 1996},
month = {Tue Dec 31 00:00:00 EST 1996}
}