Test and evaluation of the BBC CQK 200-4 modulator tube for the MFTF sustaining neutral beam power supply system
The BBC CQK 200-4 Tube was tested by Aydin at LLL, to confirm that it would switch 90 kV after conducting 88 amperes for 30 seconds. The CQK 200-4 is a recent modification of the CQK 200-3, an Rf transmitter tube designed for continuous loading, to increase the anode hold-off voltage to 150 kV. During the design life of the tube it will be subjected to 10/sup 5/ to 10/sup 6/ cyclic thermal loads. Two concerns are that (1) during the 30 second high current load, the screen grid may have excessive dissipation causing a loss of control of the tube, and (2) the cyclic temperature-induced stresses in the anode may cause fatigue failures that will reduce the tube's useful life. The first concern was addressed by performing full scale tests at the LLL test facility.
- Research Organization:
- California Univ., Livermore (USA). Lawrence Livermore Lab.; Aydin Energy Div., Palo Alto, CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5455607
- Report Number(s):
- UCRL-82951; CONF-791102-145; TRN: 80-007308
- Resource Relation:
- Conference: 8. symposium on engineering problems of fusion research, San Francisco, CA, USA, 13 Nov 1979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Protection of the MFTF accel power supplies
Elimination of output-current transients in the MFTF sustaining neutral-beam-arc power supplies
Related Subjects
NEUTRAL BEAM SOURCES
POWER SUPPLIES
TEST FACILITIES
MFTF DEVICES
MODULATION
PERFORMANCE TESTING
SWITCHES
ELECTRICAL EQUIPMENT
ELECTRONIC EQUIPMENT
EQUIPMENT
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
TESTING
THERMONUCLEAR DEVICES
700203* - Fusion Power Plant Technology- Power Supplies
Energy Storage