A CROWBARLESS HIGH VOLTAGE POWER CONVERTER FOR RF KLYSTRONS
Advances in power electronic components make feasible the production of switch-mode power converters in module sizes exceeding 100kW. The development of a power converter system in modular form for feeding high power CW RF klystrons will be described. It has the advantage that the stored energy at high voltage is so small that the conventional crowbar protection is unnecessary. Results of work to test the principle on a 50kW klystron used for power testing accelerating cavities at Daresbury will be presented.
A HIGH VOLTAGE POWER SUPPLY FOR A DIAGNOSTIC INJECTOR OF NEUTRAL ATOMS
For the purpose of active corpuscular diagnostics of plasma parameters in thermonuclear facilities the Budker Institute of Nuclear Physics SB RAS created the Diagnostic Injector of Neutral Atoms (DI) with the following parameters: neutral atom energy range from 20kV up to 55 kV, atomic current up to 2A (ion current up to 5A) and operation time up to 50 ms. The High Voltage Power Supply (HVPS) makes it possible to obtain modulated or unmodulated stabilized voltage in all the range, at output current as high as 8A. A capacitor storage bank is used as a primary source of energy. Voltage from capacitors is transformed to high voltage with the help of a multi-channel IGBT converter with PWM regulation. The report describes the realization of HVPS, design, commissioning and results.
Investigating the Optical properties of cd1-xznxs thin films deposited by the Dip Technique
A Thesis submitted to the Department of Physics, Kwame Nkrumah University of Science and Technology, in partial fulfillment of the requirement for the degree of 
Master of Science (Solid State Physics)