High power experiment and heat load evaluation of transmission line for the ECH/CD system in JT-60SA

T Kobayashi, H Yamazaki, S Hiranai… - Fusion Engineering and …, 2022 - Elsevier
Temperature rise of the waveguide transmission line for high-power long-pulse ECH/CD
system has been evaluated experimentally using the dummy load transmission line in JT …

Performance and upgrades for the electron cyclotron heating system on DIII-D

M Cengher, J Lohr, YA Gorelov, R Ellis… - … on Plasma Science, 2014 - ieeexplore.ieee.org
The electron cyclotron heating (ECH) system on the DIII-D fusion reactor consists of six 110-
GHz gyrotrons with 6 MW installed power for pulses limited administratively to 5 s in length …

Investigation on the multi-hole directional coupler for power measurement of the J-TEXT ECRH system

W Wenting, XIA Donghui, T Yizhe… - Plasma Science and …, 2022 - iopscience.iop.org
Power measurement is necessary for an electron cyclotron resonance heating (ECRH)
system. The directional coupler method has been put forward to monitor high-power …

DIII-D electron cyclotron heating system status and upgrades

M Cengher, J Lohr, Y Gorelov… - … on Plasma Science, 2016 - ieeexplore.ieee.org
The DIII-D electron cyclotron heating (ECH) system consists of six 110-GHz gyrotrons with
corrugated coaxial 31.75-mm waveguide transmission lines, and steerable launching …

Evaluation of transmission efficiency of the ECH/CD transmission lines in integrated commissioning phase on JT-60SA

H Yamazaki, T Kobayashi, K Takahashi… - Fusion Engineering and …, 2023 - Elsevier
An electron cyclotron heating and current drive (ECH/CD) system with two transmission lines
(TLs), TL# 1 (waveguide inner diameter⌀= 31.75 mm) and TL# 2 (⌀= 60.3 mm), has been …

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

MA Shapiro, RJ Temkin - Journal of Infrared, Millimeter, and Terahertz …, 2011 - Springer
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 …

Advances in technology and high power performance of the ECH system on DIII-D

M Cengher, X Chen, R Ellis, Y Gorelov, J Lohr… - Fusion engineering and …, 2017 - Elsevier
The gyrotron complex on DIII-D has been updated and consists of six gyrotrons installed and
routinely operating reliably for injection of up to 3.6 MW into the plasma. The eight sets of …

New features of the ECH control system on DIII-D and impact of power modulation on collector loading

AC Torrezan, D Ponce, Y Gorelov, M Cengher… - Fusion engineering and …, 2019 - Elsevier
In order to increase the reliability and improve the availability of electron cyclotron heating
(ECH) and current drive during a plasma shot, an adaptive gyrotron command generator has …

Transmission lines power measurements for the 110 GHz electron cyclotron heating system on DIII-D and gyrotron operational performance

M Cengher, J Lohr, D Ponce… - 35th International …, 2010 - ieeexplore.ieee.org
Operational trends for the six-gyrotron electron cyclotron heating system on DIII-D are
presented. Losses in the transmission lines were measured and values close to theoretical …

[PDF][PDF] Transmission Line Power Measurements for the 110 GHz Electron Cyclotron Heating System on DIII-D and Gyrotron Operational Performance

M Cengher, J Lohr, D Ponce, YA Gorelov, CP Moeller - this conference - researchgate.net
Operational trends for the six-gyrotron electron cyclotron heating system on DIII-D are
presented. Losses in the transmission lines were measured and values close to theoretical …