Brazed ceramic window for ion Bernstein wave heating

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:464956

Daugert, R D; Evans, H E; Jurczynski, S Z; Bernabei, S ^[1]; Walls, R W ^[2]

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1. Princeton Univ., NJ (United States). Plasma Physics Lab.
2. Princeton Engineering Group, Huntingdon, PA (United States)

The paper explores an innovative design of a brazed ceramic window for use on the FT-U Tokamak at Laboratori Gas Ionizzati, Frascati, Italy for the Ion Bernstein Wave (IBW) Heating Experiment. Ion Bernstein Wave power of 600 kW at a frequency of 433 MHz will be transmitted for 0.5 seconds into the FT-U Tokamak. In the past, IBW heating was accomplished by the use of an antenna inside the Tokamak. The window, which provides an ultra-high vacuum boundary for the Tokamak, allows a pair of waveguides carrying Ion Bernstein Waves to couple efficiently to the plasma. This type of configuration affords several advantages over placement of an antenna inside the Tokamak. By eliminating the in-vessel antenna, reliability is increased for the IBW Heating Experiment. In addition, maintenance is facilitated as all major components are more accessible to personnel. The window is comprised of two individual windows of high-purity alumina, each measuring approximately 15.8 inches by 3.0 inches by 0.6 inches thick, and brazed into a titanium alloy flange. In preparation for installation, the window presently is undergoing electrical tests at Laboratori Gas Ionizzati.

• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 464956
• Report Number(s): CONF-950905--; ISBN 0-7803-2969-4
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM OXIDES
BRAZING
DESIGN
ENERGY TRANSFER
FT TOKAMAK
HIGH-FREQUENCY HEATING
SPECIFICATIONS
VACUUM SYSTEMS
WINDOWS