Cyclotrons2016 - List of Keywords (resonance)

Paper	Title	Other Keywords	Page
MODM03	Equivalent Circuit Model of Cyclotron RF System	cyclotron, cavity, simulation, impedance	39
	M. Mohamadian, H. Afarideh, S. Sabounchi, M. Salehi AUT, Tehran, Iran M. Ghergherehchi SKKU, Suwon, Republic of Korea
	Cyclotron cavity modeled via electromagnetic circuits in the desired frequency. The design performed according to resonator basis and also cyclotron acceleration requirements with ADS software and compared to simulations made by the CST microwave studio. The scattering parameters obtained for main resonators of the cyclotron and Dee parts as a diaphragm for each of cavity sections and also for the whole structure. All the characteristics modeled and calculated by the electromagnetic rules and theory of resonators from circuit model. Then it analysed with numerical methods for bench-marking. Finally, it shows that the circuit model able to modeled accurately the cyclotron cavity and especially it can estimate precisely the structure parameters without any time consuming numerical method simulations.
	Poster MODM03 [1.475 MB]
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MOP09	Simulation Code Development for High-Power Cyclotron	cyclotron, betatron, closed-orbit, simulation	68
	C.U. Choi, M. Chung UNIST, Ulsan, Republic of Korea G. Hahn KIRAMS, Seoul, Republic of Korea J. Lee, T.-Y. Lee, S. Shin PAL, Pohang, Republic of Korea
	A high power cyclotron is a good candidate as a driver of the accelerator driven system for the transmutation of long lived nuclear wastes. In this work, a simulation code has been developed for describing the beam dynamics in the high power cyclotron. By including higher order terms in transverse transfer matrix and space charge effects, we expect to describe the beam motion more accurately. The present code can describe equivalent orbit at each energy, calculate the tunes, and also perform multi-particle tracking. We report the initial results of the code for the simulation of a 13 MeV cyclotron. Lastly, an upgrade plan is discussed to add more features and to increase calculating efficiency.
	Poster MOP09 [1.630 MB]
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MOP14	Study of the Beam Extraction from Superconducting Cyclotron SC200	extraction, cyclotron, septum, proton	87
	K.Z. Ding, Y.F. Bi, G. Chen, Y. Chen, Sh. Du, H. Feng, J. Ge, J. Li, Y. Song, Y.H. Xie, J. Zheng ASIPP, Hefei, People's Republic of China O. Karamyshev, G.A. Karamysheva, N.A. Morozov, E.V. Samsonov, G. Shirkov JINR, Dubna, Moscow Region, Russia
	According to the agreement between the Institute of Plasma Physics (ASIPP) of the Chinese Academy of Sciences in Hefei, China, and Joint Institute for Nuclear Research (JINR), Dubna, Russia, the project of superconducting isochronous cyclotron for proton therapy SC200 is under development at JINR. The cyclotron will provide acceleration of protons up to 200 MeV with maximum beam current ~1 μA. Extraction system of the beam consists of electrostatic deflector and two passive magnetic channels. Electric field strength in deflector does not exceed 170 kV/cm, gradients of magnetic field in channels are in range 2-4 kG/cm.The first of the channels focusing the beam in horizontal plane is subdivided into four parts. Geometry and magnetic field of two and three bars sub channelsare described. Results of the beam tracking inside extraction system are presented. Efficiency of the beam extraction was estimated for different amplitudes of the betatron oscillations in accelerated beam.
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TUP13	Magnetic Field Measurement System of CS-30 Cyclotron	cyclotron, ion, extraction, data-acquisition	196
	F.M. Alrumayan, A. Algaith, A.M. Hendy, J.F. Schneider King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Kingdom of Saudi Arabia SA. AL-Ghamdi, H.A. Kassim KSU, Riyadh, Kingdom of Saudi Arabia
	Funding: This project was supported by the NSTIP strategic technologies program in the kingdom. – Award No. (14-MAT-1233-20). The magnetic field of the CS-30 Cyclotron at King Faisal Specialist Hospital and Research Centre (KFSHRC) has been measured using Hall probe-based mapping system. Although the CS-30 Cyclotron was under full operation for 3 decades, yet, it was crucial to evaluate the stability of beam orbits, particularly after stripping the cyclotron coils and its three sectors. The rational for stripping magnetic component was to replace the pole tip seal underneath the frame. The Hall probe was mounted on a high precision X – Y stage, which was driven by three stepping motors, two motors for X – axis and one motor for Y – axis. The 3MH5 digital Teslameter is a high performance magnetic field measuring instrument, based on the Hall Effect magnetic field – to – voltage transducer. It has digital data correction to provide 0.01% accuracy and it provides the possibility of automatic data acquisition via USB port of our computer. Results have shown an average field of 1.8 T. Further results will be presented and discussed.
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THB01	The S2C2: From Source to Extraction	proton, extraction, cyclotron, injection	285
	J. van de Walle, M. Abs, E. Forton, S. Henrotin, Y. Jongen, W.J.G.M. Kleeven, P. Verbruggen IBA, Louvain-la-Neuve, Belgium M. Conjat, J. Mandrillon, P. Mandrillon AIMA, Nice, France
	Apart from being the first constructed superconducting accelerator, the S2C2 is also the first synchro-cyclotron at IBA. To study the beam dynamics, new computational tools had to be developed dealing with much larger number of turns, the longitudinal capture in the central region and the regenerative extraction. The S2C2 is a medical accelerator requiring a precise control of the beam characteristics so a deep understanding of beam dynamics is mandatory. Our simulation strategy allows to gain important insight in the acceleration process and beam characteristics: the beam emittance and energy spread, beam losses, effects of coil misalignments, median plane errors, resonances, etc. The simulation tools are split in three parts. At first, protons are tracked from the source up to about 3 MeV with the in-house tracking code AOC. In a second part, only the energy, RF phase and orbit centers are tracked as a function of time. Finally, a detailed tracking from 225 MeV up to extraction is performed with AOC. Simulations are compared to experimental observations during in-factory testing and commissioning of the first S2C2 installed in Nice, France.
	Slides THB01 [2.574 MB]
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THP14	Design of RF Pick-up for the Cyclotron	pick-up, cavity, cyclotron, simulation	336
	D.H. Ha, J.-S. Chai, M. Ghergherehchi, H.S. Kim, J.C. Lee, S.C. Mun, H. Namgoong, S. Shin SKKU, Suwon, Republic of Korea
	The radio-frequency (RF) pick-up for RFT-30 cyclotron which was located in the Korea Atomic Energy Research Institute (KAERI) was designed by Sungkyunkwan University in Korea. This paper covers proper position of RF pick-up and things to consider when designing. Our RF pick-up antenna is designed for RFT-30, but approach to design process can be used any RF pick-up antenna design. This paper provide some tendency graph according to position of RF pick-up.
	Poster THP14 [2.010 MB]
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Paper

Title

Other Keywords

Page

MODM03

Equivalent Circuit Model of Cyclotron RF System

cyclotron, cavity, simulation, impedance

39

M. Mohamadian, H. Afarideh, S. Sabounchi, M. Salehi
AUT, Tehran, Iran
M. Ghergherehchi
SKKU, Suwon, Republic of Korea

Cyclotron cavity modeled via electromagnetic circuits in the desired frequency. The design performed according to resonator basis and also cyclotron acceleration requirements with ADS software and compared to simulations made by the CST microwave studio. The scattering parameters obtained for main resonators of the cyclotron and Dee parts as a diaphragm for each of cavity sections and also for the whole structure. All the characteristics modeled and calculated by the electromagnetic rules and theory of resonators from circuit model. Then it analysed with numerical methods for bench-marking. Finally, it shows that the circuit model able to modeled accurately the cyclotron cavity and especially it can estimate precisely the structure parameters without any time consuming numerical method simulations.

Poster MODM03 [1.475 MB]

Export •

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

MOP09

Simulation Code Development for High-Power Cyclotron

cyclotron, betatron, closed-orbit, simulation

68

C.U. Choi, M. Chung
UNIST, Ulsan, Republic of Korea
G. Hahn
KIRAMS, Seoul, Republic of Korea
J. Lee, T.-Y. Lee, S. Shin
PAL, Pohang, Republic of Korea

A high power cyclotron is a good candidate as a driver of the accelerator driven system for the transmutation of long lived nuclear wastes. In this work, a simulation code has been developed for describing the beam dynamics in the high power cyclotron. By including higher order terms in transverse transfer matrix and space charge effects, we expect to describe the beam motion more accurately. The present code can describe equivalent orbit at each energy, calculate the tunes, and also perform multi-particle tracking. We report the initial results of the code for the simulation of a 13 MeV cyclotron. Lastly, an upgrade plan is discussed to add more features and to increase calculating efficiency.

Poster MOP09 [1.630 MB]

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

MOP14

Study of the Beam Extraction from Superconducting Cyclotron SC200

extraction, cyclotron, septum, proton

87

K.Z. Ding, Y.F. Bi, G. Chen, Y. Chen, Sh. Du, H. Feng, J. Ge, J. Li, Y. Song, Y.H. Xie, J. Zheng
ASIPP, Hefei, People's Republic of China
O. Karamyshev, G.A. Karamysheva, N.A. Morozov, E.V. Samsonov, G. Shirkov
JINR, Dubna, Moscow Region, Russia

According to the agreement between the Institute of Plasma Physics (ASIPP) of the Chinese Academy of Sciences in Hefei, China, and Joint Institute for Nuclear Research (JINR), Dubna, Russia, the project of superconducting isochronous cyclotron for proton therapy SC200 is under development at JINR. The cyclotron will provide acceleration of protons up to 200 MeV with maximum beam current ~1 μA. Extraction system of the beam consists of electrostatic deflector and two passive magnetic channels. Electric field strength in deflector does not exceed 170 kV/cm, gradients of magnetic field in channels are in range 2-4 kG/cm.The first of the channels focusing the beam in horizontal plane is subdivided into four parts. Geometry and magnetic field of two and three bars sub channelsare described. Results of the beam tracking inside extraction system are presented. Efficiency of the beam extraction was estimated for different amplitudes of the betatron oscillations in accelerated beam.

Export •

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

TUP13

Magnetic Field Measurement System of CS-30 Cyclotron

cyclotron, ion, extraction, data-acquisition

196

F.M. Alrumayan, A. Algaith, A.M. Hendy, J.F. Schneider
King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Kingdom of Saudi Arabia
SA. AL-Ghamdi, H.A. Kassim
KSU, Riyadh, Kingdom of Saudi Arabia

Funding: This project was supported by the NSTIP strategic technologies program in the kingdom. – Award No. (14-MAT-1233-20).
The magnetic field of the CS-30 Cyclotron at King Faisal Specialist Hospital and Research Centre (KFSHRC) has been measured using Hall probe-based mapping system. Although the CS-30 Cyclotron was under full operation for 3 decades, yet, it was crucial to evaluate the stability of beam orbits, particularly after stripping the cyclotron coils and its three sectors. The rational for stripping magnetic component was to replace the pole tip seal underneath the frame. The Hall probe was mounted on a high precision X – Y stage, which was driven by three stepping motors, two motors for X – axis and one motor for Y – axis. The 3MH5 digital Teslameter is a high performance magnetic field measuring instrument, based on the Hall Effect magnetic field – to – voltage transducer. It has digital data correction to provide 0.01% accuracy and it provides the possibility of automatic data acquisition via USB port of our computer. Results have shown an average field of 1.8 T. Further results will be presented and discussed.

Export •

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

THB01

The S2C2: From Source to Extraction

proton, extraction, cyclotron, injection

285

J. van de Walle, M. Abs, E. Forton, S. Henrotin, Y. Jongen, W.J.G.M. Kleeven, P. Verbruggen
IBA, Louvain-la-Neuve, Belgium
M. Conjat, J. Mandrillon, P. Mandrillon
AIMA, Nice, France

Apart from being the first constructed superconducting accelerator, the S2C2 is also the first synchro-cyclotron at IBA. To study the beam dynamics, new computational tools had to be developed dealing with much larger number of turns, the longitudinal capture in the central region and the regenerative extraction. The S2C2 is a medical accelerator requiring a precise control of the beam characteristics so a deep understanding of beam dynamics is mandatory. Our simulation strategy allows to gain important insight in the acceleration process and beam characteristics: the beam emittance and energy spread, beam losses, effects of coil misalignments, median plane errors, resonances, etc. The simulation tools are split in three parts. At first, protons are tracked from the source up to about 3 MeV with the in-house tracking code AOC. In a second part, only the energy, RF phase and orbit centers are tracked as a function of time. Finally, a detailed tracking from 225 MeV up to extraction is performed with AOC. Simulations are compared to experimental observations during in-factory testing and commissioning of the first S2C2 installed in Nice, France.

Slides THB01 [2.574 MB]

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THP14

Design of RF Pick-up for the Cyclotron

pick-up, cavity, cyclotron, simulation

336

D.H. Ha, J.-S. Chai, M. Ghergherehchi, H.S. Kim, J.C. Lee, S.C. Mun, H. Namgoong, S. Shin
SKKU, Suwon, Republic of Korea

The radio-frequency (RF) pick-up for RFT-30 cyclotron which was located in the Korea Atomic Energy Research Institute (KAERI) was designed by Sungkyunkwan University in Korea. This paper covers proper position of RF pick-up and things to consider when designing. Our RF pick-up antenna is designed for RFT-30, but approach to design process can be used any RF pick-up antenna design. This paper provide some tendency graph according to position of RF pick-up.

Poster THP14 [2.010 MB]

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