PRACTICAL EXERIENCES WITH THE 6 GYROTRON SYSTEM ON THE DIII-D TOKAMAK

Conference · Wed Oct 01 04:00:00 EDT 2003

OSTI ID:823622

LOHR, J; CARY, W P; GORELOV, Y A; GRUNLOH, H J; KAJIWARA, K; PEAVY, J J; PONCE, D; TOOKER, J; CALLIS, R W

OAK-B135 The gyrotron installation on the DIII-D tokamak now comprises six 110 GHz gyrotrons in the 1 MW class, three manufactured by CPI[1] and three by Gycom [2]. Two tetrode rectifier/modulator/regulator power supplies were constructed to provide power for the CPI gyrotrons. A second system uses three mod/reg tetrodes connected in parallel, which are fed by a dual parallel tetrode mod/reg to power the Gycom tubes. the windowless evacuated transmission lines are up to 100 m in length, with 80% transmission efficiency. Engineering solutions were developed in specific problematic areas encountered in the development of this complex system, including: Gyrotron instability; high voltage circuit instability; gyrotron conditioning; rf beam forming and coupling to waveguide; output window vacuum seals; material control; launcher mechanics and diagnosis; polarizer mechanics; dummy loads; power measurements; polarization measurements; cooling; calorimetry; and operating controls. The system is in routine operation in support of tokamak experiments, with peak generated power of about 5 MW at 2 s. pulse length and about 3 MW for 5 s. pulses. This presentation focuses on practical lessons learned in the development and operation of these systems.

• Research Organization: GENERAL ATOMICS (US)
• Sponsoring Organization: (US)
• DOE Contract Number: AC03-99ER54463
• OSTI ID: 823622
• Report Number(s): GA-A24486
• Country of Publication: United States
• Language: English

Related Subjects

24 POWER TRANSMISSION AND DISTRIBUTION
CALORIMETRY
DIAGNOSIS
DOUBLET-3 DEVICE
EFFICIENCY
INSTABILITY
MICROWAVE AMPLIFIERS
POLARIZATION
POWER SUPPLIES
POWER TRANSMISSION LINES
WINDOWS