2005 47th Annual Meeting of the Division of Plasma Physics
Monday–Friday, October 24–28, 2005;
Denver, Colorado
Session LI1b: Magnetic Plasma Technology
3:00 PM–5:00 PM,
Wednesday, October 26, 2005
Adam's Mark Hotel
Room: Plaza Ballroom ABC
Chair: J. Reece Roth, University of Tennessee
Abstract ID: BAPS.2005.DPP.LI1b.3
Abstract: LI1b.00003 : Recent Progress on ECH Technology for ITER
4:00 PM–4:30 PM
Preview Abstract
Abstract
Author:
Jagadishwar Sirigiri
(MIT Plasma Science and Fusion Center)
The Electron Cyclotron Heating and Current Drive (ECH{\&}CD)
system for ITER
is a critical ITER system that must be available for use on Day 1
of the
ITER experimental program. The applications of the system include
plasma
start-up, plasma heating and suppression of Neoclassical Tearing
Modes
(NTMs). These applications are accomplished using 27 one megawatt
continuous
wave gyrotrons: 24 at a frequency of 170 GHz and 3 at a frequency
of 120
GHz. There are DC power supplies for the gyrotrons, a
transmission line
system, one launcher at the equatorial plane and three upper port
launchers.
The US will play a major role in delivering parts of the
ECH{\&}CD system to
ITER.
The present state-of-the-art includes major advances in all areas
of ECH
technology. In the US, a major effort is underway to supply
gyrotrons of up
to 1.5 MW power level at 110 GHz to General Atomics for use in
heating the
DIII-D tokamak. This presentation will include a brief review of the
state-of-the-art, worldwide, in ECH technology. The requirements
for the
ITER ECH{\&}CD system will then be reviewed. ITER calls for
gyrotrons
capable of operating from a 50 kV power supply, after potential
depression,
with a minimum of 50{\%} overall efficiency. This is a very
significant
challenge and some approaches to meeting this goal will be
presented.
Recent experimental results at MIT showing improved efficiency of
high
frequency, 1.5 MW gyrotrons will be described. These results will be
incorporated into the planned development of gyrotrons for ITER.
The ITER
ECH{\&}CD system will also be a challenge to the transmission
lines, which
must operate at high average power at up to 1000 seconds and with
high
efficiency. The technology challenges and efforts in the US and
other ITER
parties to solve these problems will be reviewed. \newline
\newline
*In collaboration with E. Choi, C. Marchewka, I. Mastovosky, M.
A. Shapiro
and R. J. Temkin. This work is supported by the Office of Fusion
Energy
Sciences of the U. S. Department of Energy.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.DPP.LI1b.3