The Electron Cyclotron Resonant Heating System on the DIII-D Tokamak

Lohr, J.; Gorelov, Y.A.; Kajiwara, K.; Ponce, D.; Callis, R.W.; Doane, J.L.; Ellis, Richard L.; Grunloh, H.J.; Moeller, C.P.; Peavey, J.; Prater, R.; Tooker, J.F.

doi:10.13182/fst05-a1073

Cited by 32 publications

(16 citation statements)

References 13 publications

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“…and σ (τ ) = −ka dr dz (9) allows one to transform the problem with the boundary r = r(z) (Fig. 2) to the problem with the linear boundary ρ = 1 (Fig.…”

Section: Parabolic Equation and Lens Transformationmentioning

confidence: 99%

“…1) with the final mirror directing the linearly-polarized output beam through a diamond window. A mirror optics unit (MOU) [9] that contains two quasioptical mirrors ( Fig. 1) is connected to the gyrotron window and converts the gyrotron output beam to a Gaussian beam (TEM 00 mode) with the optimal parameters (the beam waist radius and phase front curvature radius) for coupling into the corrugated waveguide.…”

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confidence: 99%

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Calculation of a Hyperbolic Corrugated Horn Converting the TEM00 Mode to the HE11 Mode

Shapiro

Temkin

2010

J Infrared Milli Terahz Waves

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Corrugated waveguide transmission lines are in use to transmit high power mm-wave radiation from gyrotrons to the plasma for electron cyclotron plasma heating in tokamaks such as ITER. The coupling efficiency of the gyrotron output radiation formed as a quasi-Gaussian beam to the waveguide mode is a critical issue. A hyperbolic corrugated horn serves as a converter of the TEM 00 Gaussian mode to the HE 11 mode of a corrugated waveguide. We report the design of a hyperbolic horn for application in the ITER transmission line at 170 GHz. The theoretical conversion efficiency of the horn is higher than 0.995.

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“…and σ (τ ) = −ka dr dz (9) allows one to transform the problem with the boundary r = r(z) (Fig. 2) to the problem with the linear boundary ρ = 1 (Fig.…”

Section: Parabolic Equation and Lens Transformationmentioning

confidence: 99%

mentioning

confidence: 99%

Calculation of a Hyperbolic Corrugated Horn Converting the TEM00 Mode to the HE11 Mode

Shapiro

Temkin

2010

J Infrared Milli Terahz Waves

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“…The gyrotron system on the DIII-D tokamak [1] presently comprises six operating tubes, with infrastructure for eight, all of which nominally generate 1 MW for short pulses and about 800 kW for operational pulse lengths, which are limited administratively to 5 s, consistent with the DIII-D pulse length. The measured transmission line efficiencies are ~75%, in agreement with expectations for the 90-100 m line lengths and numbers of miter bends.…”

Section: Introductionmentioning

confidence: 99%

Performance History and Upgrades for the DIII-D Gyrotron Complex

Lohr

Anderson

Cengher

et al. 2015

EPJ Web of Conferences

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“…LECTRON cyclotron heating (ECH) and electron cyclotron current drive (ECCD) using high-power gyrotrons are among the most promising methods for plasma heating, current drive, and instability control for thermonuclear fusion research [1], [2]. The requirements on fusion reactors to be sustainable and profitable energy sources lead to demands on gyrotrons for high-efficiency continuous wave (CW) operation.…”

Section: Introductionmentioning

confidence: 99%