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R&D works on 1MHz power modulator for induction synchrotron
By: Torikai, K.; Kishiro, J.; Takayama, K.; Koseki, K.; Shimosaki, Y.; Igarashi, S.; Nakamura, E.; Sato, H.; Shirakata, M.; Wake, M.; Inagaki, S.; Arakida, Y.; Toyama, T.;
2003 / IEEE / 0-7803-7738-9
This item was taken from the IEEE Conference ' R&D works on 1MHz power modulator for induction synchrotron ' A proof of principle experiment of an Induction Synchrotron is scheduled in 2003 at the KEK 12GeV-PS. Proton bunches are accelerated with a 10kV of rectangular shaped induction voltage. An accelerating system consists of four induction cavities capable of individually generating a 2.5kV of output voltage. Each cavity is driven by a solid-state power modulator, which is operated at a revolution frequency of 600-800 kHz. The modulator circuit consists of MOS-FETs as switching element. Uniformity in the voltage waveform is crucial for the stable acceleration. Ringing in the voltage waveform caused by coupling of self-inductance of circuit and output capacitance of MOS-FETs deteriorates the uniformity. With the help of circuit analysis and simulation method of minimizing the self-inductance has been developed. Ratio of numbers of MOS-FETs in series and in parallel which defines the total output capacitance is also important to design the power modulator circuit. Power loss in MOS-FET is also important for stable operation of the power modulator. By the circuit analysis, it is also found that the output capacitance contributes to the power loss.
Total Output Capacitance
Research And Development
Solid State Circuits
Solid-state Power Modulator
Rectangular Shaped Induction Voltage
600 To 800 Khz
Particle Beam Bunching
Power Supplies To Apparatus
Power Semiconductor Switches
1mhz Power Modulator