The possibility to measure voltage
over a filament at high voltage level
in klystrons and magnetrons has been
evaluated. A prototype with circuits
neccessary for measuring, power supply
and fiber optic communication has been
designed, built and tested in a
magnetron at Scandinova System AB.
These measurements lead to an
increased understanding of how
klystrons and magnetrons work and also
give the user better control over
their performance during operation.
Since measurements have been done on a
high voltage level near powerful
electric and magnetic fields, there
have been high demands on power
supply, circuit protection and
communication. Additionally, for
klystron systems, the measurement
circuit has been placed in an oil tank
with the transformers.
The complete system consists of two
major parts, a measurement circuit to
do the actual measurements on high
voltage level, as well as a control
circuit that controls the measurement
circuit and collects and displays the
data on an LCD display. Communication
between the two units is done via two
fiber optic cables.
Measurements were conducted
successfully but unfortunately power
supply became an issue and it is
recommended to pursue that subject
further in the future.