Development of high power klystron for JT-60 radio frequency plasma heating system.

Techno-Economic Appraisal of Using Radio Frequency For Energy Consevation in the Heating System of Residential Buildings

Residential and commercial sectors are the main consumers of energy. According to available data, these two sectors account for more than one-third of total energy use. Moreover, heating and cooling systems contribute to the major share of energy use in a building. The current research economically evaluates the radio-frequency heating systems for use in residential buildings. A building in Dis...

Direct coupling of pulsed radio frequency and pulsed high power in novel pulsed power system for plasma immersion ion implantation.

A novel power supply system that directly couples pulsed high voltage (HV) pulses and pulsed 13.56 MHz radio frequency (rf) has been developed for plasma processes. In this system, the sample holder is connected to both the rf generator and HV modulator. The coupling circuit in the hybrid system is composed of individual matching units, low pass filters, and voltage clamping units. This ensures...

Status and Prospect of Jt-60 Plasma Control System for Advanced Tokamak Discharge Scenarios

A large tokamak fusion device JT-60 is expected to explore more advanced tokamak dischrarge scenarios toward the ITER and a future power reactor. Since various experimental issues are to be adequately discussed, and possibly to be solved in JT-60, the plasma real-time control system has been drastically improved with remodeling in hardware as well as in software. To satisfy the requirements, th...

Microwave and Radio Frequency Heating

FT/P2-26 Long Pulse/High Power ECRF System Development in JT-60U

Abstract. In the recent gyrotron development in JT-60U ECRF system, output power of 1.5 MW for 1 s has been achieved at 110 GHz. It is the world highest power oscillation in the range of > 1 s. In addition to the carefully designed cavity and collector in view of thermal stress, an RF shield for the adjustment bellows, and a low-dielectric-loss DC break enabled this achievement. Power modulatio...