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MOP022 |
Project of a Novel Multi-Orbital Beam Bunching and Extraction from the U-120M Cyclotron |
80 |
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- M. Čihák, R. Běhal, P. Krist, T. Matlocha, J. Stursa, V. Zach
NPI, Řež near Prague, Czech Republic
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We introduce the bunching system for a time structure control of the U-120M cyclotron beam. The system is based on a unique pulsed vertical deflection of the selected final orbits of the internal accelerated beam of the H− ions to an extractor-stripper (a thin carbon foil positioned below the cyclotron median plane). A set of home-made programs have been developed for simulations and parameters determination of the system. Results of some simulations (i.e. dimensions of the deflection system, parameters of the pulsed high voltage power supply, position of the stripper, beam trajectories, beam parameters, beam losses, Be target position etc.) are presented. The system will be used for fast neutron generation and consequently for spectrometric measurement of neutron energy by the time of flight (ToF) method. The system will provide beam bunch interval up to 1000 ns range of a defined beam time structure (up to beam bunch period to beam bunch width ratio min 100).
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP022
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About • |
paper received ※ 15 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020 |
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MOP023 |
Synchronization and High Speed High Voltage Switcher for Pulse Bunching System of the Cyclotron U-120M |
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- P. Krist, D. Poklop, J. Stursa
NPI, Řež near Prague, Czech Republic
- V. Cervenka
HiLASE Centre, Institute of Physics ASCR, v.v.i., Dolní BřeÂany, Czech Republic
- J. Vozáb
Radan s.r.o., Barchov, Czech Republic
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Pulse bunching system for neutron time of flight (ToF) measurements on the cyclotron U-120M exploits a unique pulsed vertical deflection of the selected final orbits of the internal accelerated beam of the H− ions to an extractor-stripper. This system is described in details on an individual poster of this conference. A key device is the pulse HV power supply (HV switcher) which is supplying the deflector and elevates H− ions in defined time structure to an extractor-stripper. The developed HV switcher is based on the SiC MOSFET transistors. It can provide HV pulses with the following pulse parameters: amplitude up to 13 kV, front edge less than 20 ns, flat top 20 ns, back edge less than 20 ns and repetition frequency up to several hundred of kHz. We have also developed the pulse synchronization with the cyclotron RF (25 MHz), which enables to set up front edge of bunching pulses within 2pi with accuracy 80 ps. Human-machine interface is based on SCADA software Reliance and PLC Tecomat Foxtrot. The time waveforms of the real pulses are part of the presentation.
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP023
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|
About • |
paper received ※ 15 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020 |
|
Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
|
|
|