High reflection LH experiments with the JT-60U launcher with oversized waveguides

Journal Article · Thu Feb 01 04:00:00 EST 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.49564· OSTI ID:284121

Tuccillo, A A; Podda, S ^[1]; Seki, M; Asakura, N; Ide, S; Ikeda, Y; Kimura, H; Kondoh, T; Naito, O; Ushigusa, K ^[2]

---

1. Associazione EURATOM-ENEA sulla Fusione, CRE Frascati, C.P. 65, 00044 Frascati, Rome (Italy)
2. Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-machi, Naka-gun, Ibaraki-ken, 311-01 (Japan)

The Current Drive performances of the JT-60U multijunction launcher, fed by oversized waveguides, have been investigated under poor matching conditions. In the experiments the main waveguides reflection coefficient reached values of 35{percent}, moving the grill in the shadow of the port. Good agreement is found between measured and expected reflection coefficient computed without taking into account the generation of higher modes in the oversized guides and using a model for the density in front of the grill deduced from Langmuir probe measurements. Good current drive performances are observed up to reflection coefficients as high as 25{percent}, well above the theoretical expectation. {copyright} {ital 1996 American Institute of Physics.}

• Sponsoring Organization: USDOE
• OSTI ID: 284121
• Report Number(s): CONF-9505105--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 355; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COUPLING
CURRENT DENSITY
GHZ RANGE 01-100
JT-60 TOKAMAK
LOWER HYBRID CURRENT DRIVE
REFLECTION
WAVEGUIDES