Resonant Transformers for 1MV Xrays was Re: coil discharge color

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>


I think the original system Geoffrey was talking about were the GE 1 MV
Xray systems built in the thirties by Charlton and Hubbard using a
potential drop type accelerator.  Fed with 3 phase power and a clever
scheme to get 360 Hz excitation, they had a bunch of series connected
secondaries strung along a core.  The spacing and number of turns on each
secondary was adjusted to get good potential distribution.  The accelerator
tube passed through the center of the windings next to the core, with the
target below the "floor".
It was big, bulky, inefficient, etc, but it's what they had back then.


Tesla list wrote:
> The x-ray 'coil' or storage device is probably a saturable
> core transformer, but definitely not a TC.  A saturable core
> 
> I'm a project manager for converting and redesigning a
> medical x-ray linac (linear accelerator) used in
> radiation treatment therapy to a nuclear physics research accelerator
> in developing a free electron laser.  This machine
> uses a PFN (pulse forming network) and a thryatron as a
> pulse modulator for a Klystron.  The system is resonant
> at 2.856GHz with a minimum pulse power of 5 Megawatts.
> The thyratron can produce pulses (up to 200pps) at 25,000V
> at 1500 Amps which is over 30 Megawatts!  The output
> energy of the linac is 20 million electron volts at up to
> 200mA.