"If everything seems under control, you're just not going fast enough." -
Mario Andretti
Check this site-> http://wsx.lanl.gov/rotamak/index.htm
Yeah, 60 Mw = 60.000 Kw !!!
Is it enough?
12 x 3CPX1500 + 12 x ML8618
Each system (two system are used)utilizes a bank of 6 parallel magnetically
beamed ML8618 triodes. These devices are each rated at 250 Amperes cathode
current and a 45 kV plate voltage. An advantage of the magnetically beamed
triode is their extreme efficiency, requiring only 2.5 kW of filament and a
few amps and a few kV of grid drive. We will operate them at a nominal 18 kV
plate voltage, providing a 30 kV and 3000 Ampere peak to peak oscillation
waveform, on the tube plates. Each drive coil set (3.5uH) is configured with
an adjustable tank circuit (for tuning) and coupled through a 1:2 coaxial
air-core balun auto-transformer. The auto-transformer provides DC isolation
to the drive coils in addition to stepping up the coil drive voltage (to 60
kV pk-pk & 1500 A pk-pk). To control the ML8618's phase and amplitude, fast
150 Ampere "totem-pole" grid drivers, an "on" hot-deck and an "off"
hot-deck, each with 6 parallel 3CPX1500A7's are used. By adjusting the
conduction angle, amplitude may be regulated, with inter-pulse timing, phase
angle can be controlled. A central feedback timing chassis monitors each
systems' drive coils and appropriately derives each systems timing signals.
Fiber-optic cables are used to isolate between the control room timing
chassis and the remote power oscillator system. Performance characteristics
have been computer modeled and tested in the lab.
Max.
|