Auxiliary ECR heating system for the gas dynamic trap

Journal Article · Tue May 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4717757· OSTI ID:22072335

Shalashov, A G; Gospodchikov, E D; Smolyakova, O B; Malygin, V I ^[1]; Bagryansky, P A ^[2]; Thumm, M ^[3]

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1. Institute of Applied Physics of the Russian Academy of Sciences, Ulyanova St. 46, 603950 Nizhny Novgorod (Russian Federation)
2. Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences, Akademika Lavrentieva Prospect 11, 630090 Novosibirsk (Russian Federation)
3. Institut fuer Hochfrequenztechnik und Elektronik, Karlsruhe Institut fuer Technologie, Engesserstrasse 5, 76131 Karlsruhe (Germany)

Physics aspects of a new system for electron cyclotron resonance heating (ECRH) at the magnetic mirror device Gas Dynamic Trap (GDT, Budker Institute, Novosibirsk) are discussed. This system based on two 400 kW/54.5 GHz gyrotrons is aimed at increasing the electron temperature up to the range 250-350 eV for improved energy confinement of hot ions. The key physical issue of the GDT magnetic field topology is that conventional ECRH geometries are not accessible. The proposed solution is based on a peculiar effect of radiation trapping in inhomogeneous magnetized plasma. Under specific conditions, oblique launch of gyrotron radiation results in generation of right-hand-polarized (R) electromagnetic waves propagating with high N{sub Double-Vertical-Line Double-Vertical-Line} in the vicinity of the cyclotron resonance layer, which leads to effective single-pass absorption of the injected microwave power. In the present paper, we investigate numerically an optimized ECRH scenario based on the proposed mechanism of wave propagation and discuss the design of the ECRH system, which is currently under construction at the Budker Institute.

• OSTI ID: 22072335
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CYCLOTRON RESONANCE
ECR HEATING
ELECTRON TEMPERATURE
ENERGY ABSORPTION
EV RANGE
GHZ RANGE
IONS
MAGNETIC FIELDS
MAGNETIC MIRRORS
MICROWAVE AMPLIFIERS
MICROWAVE RADIATION
PLASMA
PLASMA CONFINEMENT
TOPOLOGY
TRAPPING
WAVE PROPAGATION