Power supply system for the TRIUMF KAON factory
The TRIUMF KAON factory consists of five rings, three of which are DC powered, and two synchrotrons running at 50 Hz and 10 Hz, respectively. The author deals with the power supply system envisaged for the accelerator as well as the experimental results obtained using DC-biased single- and dual-frequency resonant magnet excitation for the booster and driver synchrotrons. Test results show that due to the high Q of the circuits, a relatively small mismatch effectively doubles the current requirements from the power supply feeding the pulsed forming network. This implies that the nominal rating of the supply must be significantly higher than that required for optimum tune.<<ETX>>
The generation of a reference design for TRIUMF kaon factory booster magnet excitation
The author describes the generation of a reference design for dual dual-frequency DC-biased resonant magnet excitation for the Booster ring magnets of the TRIUMF kaon factory. The author discusses the interrelation of various parameters and their optimization resulting in a design which is to be implemented. Power system efficiency and isolating the AC grid from the cyclical power requirements of the accelerator ring magnets are of primary concern. It is noted that magnet and DC bypass choke characteristics need to be carefully specified for the resonant circuit to be viable.<<ETX>>
A technique for large-field, superficial electron therapy.
The application of electron beams to radiation therapy has received increased attention in recent years. This interest stems largely from the special characteristics of the electron depth-dose distribution; the fall-off in depth dose near the end of the range of the electrons is particularly rapid for electron beams having energies less than about 10 Mev. Such an electron beam is suitable for the treatment of widespread, superficial lesions, where it is desirable to minimize the dose to deep tissues. All the common sources of super-voltage x-rays, apart from radioactive substances, are inherently capable of producing an external beam of electrons, though with varying degrees of complexity. Electrons of about the energy suitable for superficial therapy (several Mev) may be used to produce an x-ray beam which is sufficiently penetrating for the treatment of even the deepest lesions. The Stanford medical linear accelerator was designed to provide both x-rays and electron beams. The accelerator and its applic...