First results of the 140 GHz, 0.5 MW ECRH experiment on the FTU tokamak
- 1. Associazione Euratom-ENEA-CNR sulla Fusione, Milan (Italy). Istituto di Fisica del Plasma
Description
The results of an ECRH experiment at 140 GHz, 0.5 MW, 15 ms, on the FTU tokamak are presented. The EC waves, generated by GYCOM, a gyrotron with Gaussian output, are transmitted to the plasma with an efficiency of approx. 93% by a hybrid system comprising both mirrors and corrugated waveguides. The waves, launched as an O-mode at the fundamental EC resonance from the low magnetic field side, are almost totally absorbed by the target plasma in a layer 4-8 cm wide, and cause an electron temperature increase of 0.8-2.5 keV. At electron densities above approx. 1020 m-3 the neutron production rate is also strongly enhanced (50-100%), the increase following the start of the ECRH pulse with a delay consistent with the e-i collision frequency. The ECRH power has been modulated to generate heat waves for confinement studies. (author). 2 refs, 5 figs
Additional details
Publishing Information
- Publisher
- IAEA.
- Imprint Place
- Vienna (Austria)
- ISBN
- 92-0-103695-7
- Imprint Title
- Plasma physics and controlled nuclear fusion research 1994. V.2. Proceedings of the fifteenth international conference
- Imprint Pagination
- 808 p.
- Series
- Proceedings series.
- Journal Page Range
- p. 159-166.
- ISSN
- 0074-1884
Conference
- Title
- 15. international conference on plasma physics and controlled nuclear fusion research.
- Dates
- 26 Sep - 1 Oct 1994.
- Place
- Seville (Spain).
INIS
- Country of Publication
- Austria
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 27049435
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference, Numerical Data
- Descriptors DEI
- ECR HEATING; EFFICIENCY; ELECTRON TEMPERATURE; ENERGY DEPOSITION; EXPERIMENTAL DATA; FT TOKAMAK; GHZ RANGE 100-1000; MAGNETIC CONFINEMENT; PLASMA RADIAL PROFILES; POWER RANGE 100-1000 KW; SPATIAL DISTRIBUTION; THERMAL DIFFUSIVITY
- Descriptors DEC
- CLOSED PLASMA DEVICES; CONFINEMENT; DATA; DISTRIBUTION; FREQUENCY RANGE; GHZ RANGE; HEATING; HIGH-FREQUENCY HEATING; INFORMATION; KILOWATT POWER RANGE; NUMERICAL DATA; PHYSICAL PROPERTIES; PLASMA CONFINEMENT; PLASMA HEATING; POWER RANGE; THERMODYNAMIC PROPERTIES; THERMONUCLEAR DEVICES; TOKAMAK DEVICES
Optional Information
- Collaborations
- FTU Team.
- Secondary number(s)
- IAEA-CN--60/A2/A4-P20.