title: High power millimeter wave experiment of ITER relevant electron cyclotron heating and current drive system.
abstract: High power, long pulse millimeter (mm) wave experiments of the RF test stand (RFTS) of Japan Atomic Energy Agency (JAEA) were performed. The system consists of a 1 MW/170 GHz gyrotron, a long and short distance transmission line (TL), and an equatorial launcher (EL) mock-up. The RFTS has an ITER-relevant configuration, i.e., consisted by a 1 MW-170 GHz gyrotron, a mm wave TL, and an EL mock-up. The TL is composed of a matching optics unit, evacuated circular corrugated waveguides, 6-miter bends, an in-line waveguide switch, and an isolation valve. The EL-mock-up is fabricated according to the current design of the ITER launcher. The Gaussian-like beam radiation with the steering capability of 20°-40° from the EL mock-up was also successfully proved. The high power, long pulse power transmission test was conducted with the metallic load replaced by the EL mock-up, and the transmission of 1 MW/800 s and 0.5 MW/1000 s was successfully demonstrated with no arcing and no damages. The transmission efficiency of the TL was 96%. The results prove the feasibility of the ITER electron cyclotron heating and current drive system.
authors: Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193, Japan.
authors: K
authors: K
authors: Takahashi
authors: K
authors: K
authors: Kajiwara
authors: Y
authors: Y
authors: Oda
authors: A
authors: A
authors: Kasugai
authors: N
authors: N
authors: Kobayashi
authors: K
authors: K
authors: Sakamoto
authors: J
authors: J
authors: Doane
authors: R
authors: R
authors: Olstad
authors: M
authors: M
authors: Henderson