EBT-S 28-GHz, 200-kW, CW, mixed-mode, quasi-optical plasma heating system

Technical Report · Sun Jul 01 04:00:00 EDT 1984

DOI:https://doi.org/10.2172/7092567· OSTI ID:7092567

White, T. L.; Kimrey, H. D.; Bigelow, T. S.; Bates, D. D.; Eason, H. O.

The ELMO Bumpy Torus-Scale (EBT-S) 28-GHz, 200-kW, cw, plasma heating system consists of a gyrotron oscillator, an oversized waveguide two-bend transmission system, and a quasi-optical mixed-mode microwave distribution manifold that feeds microwave power to the 24 plasma loads of the EBT-S fusion experiment. Balancing power to the 24 loads of the EBT-S fusion experiment. Balancing power to the 24 loads was achieved by adjusting the areas at 24 coupling irises. System performance is easily measured using system calorimetry. The distribution manifold mixed-mode power transmission, reflection, and loss coefficients are 89%, 6%, and 5%, respectively. The overall system efficiency (plasma power/gyrotron power) is 80%, but with some modifications to the distribution manifold we believe the ultimate efficiency can approach 90%. The system reliability is outstanding with a world's record 1 x 10/sup 5/ kW h of 28-GHz energy delivered to the EBT-S device with well over 1 x 10/sup 3/ operating hours.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7092567
• Report Number(s): ORNL/TM-9175; ON: DE84014415
• Country of Publication: United States
• Language: English

Related Subjects

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