IPAC2014 - List of Authors (Goto, A.)

Paper	Title	Page
MOPRI081	Beam Simulation for Improved Operation of Cyclotron NIRS-930	797
	M. Nakao, S. Hojo, K. Katagiri, A. Noda, K. Noda, A. Sugiura NIRS, Chiba-shi, Japan A. Goto Yamagata University, Yamagata, Japan T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi AEC, Chiba, Japan V.L. Smirnov, S.B. Vorozhtsov JINR, Dubna, Moscow Region, Russia
	Beam simulation using SNOP* code has been performed for the cyclotron NIRS-930 at NIRS in order to study beam dynamics in a cyclotron and to improve beam intensity. Each electric or magnetic field (main coil, trim coils, harmonic coils, magnetic channel, gradient corrector, grazer lens, dee electrode, inflector) were calculated by OPERA-3d, and simulated injection, acceleration, and extraction. The simulation of proton with 30 MeV extracting energy with harmonic 1 was already performed and well simulated RF phase and extraction efficiency*. Then we tried to apply SNOP to 18 MeV protons with harmonic 2. We first formed isochronous magnetic field with main and trim coils for simulating single particle. Next we optimized electric deflector and magnetic channel in order to maximize extracted particles simulating the bunch of particles. Beam loss of the simulation was compared to the experiment. And then we are optimizing position and rotation of inflector and position of puller to improve injection. We intend to apply optimized simulation parameter to actual cyclotron operation to improve beam intensity and quality. V.L. Smirnov, S.B. Vorozhtsov, Proc. of RUPAC2012 TUPPB008 325 (2012) ** V.L. Smirnov et al., Proc. of IPAC2012 292 (2012)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI081
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Paper

Title

Page

Beam Simulation for Improved Operation of Cyclotron NIRS-930

797

M. Nakao, S. Hojo, K. Katagiri, A. Noda, K. Noda, A. Sugiura
NIRS, Chiba-shi, Japan
A. Goto
Yamagata University, Yamagata, Japan
T. Honma, A.K. Komiyama, T. Okada, Y. Takahashi
AEC, Chiba, Japan
V.L. Smirnov, S.B. Vorozhtsov
JINR, Dubna, Moscow Region, Russia

Beam simulation using SNOP* code has been performed for the cyclotron NIRS-930 at NIRS in order to study beam dynamics in a cyclotron and to improve beam intensity. Each electric or magnetic field (main coil, trim coils, harmonic coils, magnetic channel, gradient corrector, grazer lens, dee electrode, inflector) were calculated by OPERA-3d, and simulated injection, acceleration, and extraction. The simulation of proton with 30 MeV extracting energy with harmonic 1 was already performed and well simulated RF phase and extraction efficiency**. Then we tried to apply SNOP to 18 MeV protons with harmonic 2. We first formed isochronous magnetic field with main and trim coils for simulating single particle. Next we optimized electric deflector and magnetic channel in order to maximize extracted particles simulating the bunch of particles. Beam loss of the simulation was compared to the experiment. And then we are optimizing position and rotation of inflector and position of puller to improve injection. We intend to apply optimized simulation parameter to actual cyclotron operation to improve beam intensity and quality.
* V.L. Smirnov, S.B. Vorozhtsov, Proc. of RUPAC2012 TUPPB008 325 (2012)
** V.L. Smirnov et al., Proc. of IPAC2012 292 (2012)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRI081

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)