3D Fokker-Planck calculation of combined fast wave/lower hybrid and electron cyclotron current drive in tokamaks

Conference · Sun Dec 01 04:00:00 EST 1991

OSTI ID:5934631

Harvey, R W; Chiu, S C ^[1]; McCoy, M G; Kerbel, G D; Smith, G R ^[2]; Mau, T K ^[3]

---

1. General Atomics, San Diego, CA (United States)
2. Lawrence Livermore National Lab., CA (United States)
3. California Univ., Los Angeles, CA (United States)

In a non-reactor tokamak environment, lower hybrid current drive can be combined with electron cyclotron waves, both (1) to control the radial profile of LH current deposition, and (2) to enhance the current drive efficiency. A related rf synergy is the use of multiple LH spectra for radial profile control as demonstrated in the ASDEX tokamak. In a reactor environment, fast waves provide an appropriate primary current drive system which can penetrate radially to the plasma core, and can be combined with ECCD. We use the CQL3D Fokker-Planck code to study these processes. Modelings of LHCD radial profile control by filling the spectral gap'' with EC or with additional LH power are presented. In the reactor environment, a range of cases with combined fast wave and electron cyclotron waves are examined, but no useful synergisms are found.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114; W-7405-ENG-48; FG03-86ER52126
• OSTI ID: 5934631
• Report Number(s): GA-A-20752; CONF-9109333--1; ON: DE92005485
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700350* -- Plasma Production
Heating
Current Drive
& Interactions-- (1992-)
ASDEX TOKAMAK
C CODES
CLOSED PLASMA DEVICES
COMPUTER CODES
CYCLOTRON RESONANCE
DIFFERENTIAL EQUATIONS
ELECTRON CYCLOTRON-RESONANCE
EQUATIONS
FOKKER-PLANCK EQUATION
LOWER HYBRID CURRENT DRIVE
NON-INDUCTIVE CURRENT DRIVE
PARTIAL DIFFERENTIAL EQUATIONS
RESONANCE
THERMONUCLEAR DEVICES
THREE-DIMENSIONAL CALCULATIONS
TOKAMAK DEVICES