Cyclotrons2016 - List of Keywords (power-supply)

Paper	Title	Other Keywords	Page
TUA02	Challenges in Fast Beam Current Control Inside the Cyclotron for Fast Beam Delivery in Proton Therapy	proton, cyclotron, controls, target	126
	S. Psoroulas, C. Bula, P. Fernandez Carmona, G. Klimpki, D. Meer, D.C. Weber PSI, Villigen PSI, Switzerland D.C. Weber University of Zurich, University Hospital, Zurich, Switzerland
	Funding: G. Klimpki's work is supported by the "Giuliana and Giorgio Stefanini Foundation" The COMET cyclotron* at PSI has been successfully used to treat patients with static tumors using the spot scanning technique, i.e. sequentially irradiating different positions inside the tumor volume. Irradiation time for each position ranges from micro- to milliseconds, with total treatment duration of about a minute. For some tumors (e.g. lung) physiological motion (e.g. respiration) interferes with the scanning motion of the beam, lowering treatment quality*. For such mobile tumors, we are developing a new technique called continuous line scanning (CLS), aiming at reducing treatment time by more than 50%. In CLS, dose rate should stabilize (within few percent) within tenths of a millisecond. We thus implemented a first prototype for fast, real-time beam control: a PID controller sets the internal electrostatic vertical deflector of the accelerator, regulating the beam current output based on the instantaneous current measured just before the patient and the knowledge of the transmission from the accelerator to the patient. In pre-clinical experiments, we achieved good control of the global dose delivered; open issues will be tackled in the next version of the controller. Schippers, J. M., et al (2007). NUCL INSTRUM METH B, 261(1-2), 773–776. **Phillips, M. H., et al (1992). PMB 37(1), 223–233.
	Slides TUA02 [1.790 MB]
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TUP02	Cold Cathode Ion Source for IBA CYCLONE®230	cathode, ion, ion-source, cyclotron	164
	P. Cailliau, J.C. Amelia, J. Brison, E. Forton IBA, Louvain-la-Neuve, Belgium M. Conjat, J. Mandrillon, P. Mandrillon AIMA, Nice, France
	At IBA, we use a P.I.G. floating cathode ion source for injection in the CYCLONE®230 cyclotron. The purpose of the project is to investigate how the pre-sent ion source could be replaced by a P.I.G. cold cathodes one with a longer lifetime. Experiments de-scribed in this article were done on a dedicated test setup to benchmark the different modes. A new chimney design has been developed to test cold cath-ode mode in CYCLONE®230 without any other me-chanical modifications.
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TUP10	A New Concept of High Current Power Supply for the Main Cyclotron Magnet at TRIUMF	controls, TRIUMF, cyclotron, interface	186
	S. Carrozza, F. Burini, E. Ferrari, M.P. Pretelli, G.T. Taddia OCEM, Valsamoggia, Italy M.C. Bastos, G. Hudson, Q. King, G. Le Godec CERN, Geneva, Switzerland I.V. Bylinskii, W. L. Louie, R.B. Nussbaumer TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	A sophisticated power supply was studied and de-signed to supply a high current to the main magnet of the TRIUMF cyclotron. The power supply will be operated with a current up to 20000 A in DC mode. It has been designed using a modular approach, with a 12-pulse input rectifier and two DC link which feeds sixteen DC/DC chopper modules in parallel connection. The conceived power supply integrates a sophisticated control and a precise current measurement chain devel-oped at CERN for the Large Hadron Collider (LHC). This paper presents the solution described in the de-sign report, the choice of the main purchased components which will lead to a final assembly and test before the end of 2016.
	Poster TUP10 [1.076 MB]
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THP07	Development of Control System for 10 MeV Cyclotron	controls, cyclotron, vacuum, PLC	319
	M. Hassani, H. Afarideh, Y. Ghorashinejad AUT, Tehran, Iran
	AmirKabir University of Technology is developing a 10 MeV cyclotron to produce radio isotopes. In order to operate the cyclotron stably, all sub-systems in the cyclotron are controlled and monitored consistently. The control system has been developed based on PLC and the operation is monitored by HMI permanently. Also, the control console located in the control room, provides data logging and controlling different steps of operation by the operator. In addition, the system can be remotely accessed over the network to monitor the status of cyclotron easily. The configuration of the control system for 10MeV cyclotron will be presented in this paper.
	Poster THP07 [1.257 MB]
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THP15	Analysis of the Plasma Characteristics for Beam Current Optimization for TR-13 Cyclotron	plasma, ion, ion-source, extraction	339
	W.J. Jun, J.-S. Chai, M. Ghergherehchi, D.H. Ha, H.S. Kim, J.C. Lee, S.C. Mun, H. Namgoong, Y.H. Yeon SKKU, Suwon, Republic of Korea
	There is a TR-13 cyclotron that extracts energy of 13 MeV protons which is located in Sungkyunkwan University. The components of the whole cyclotron are so old that cannot reproduce the situation that had been operated generally. So the researchers in this laboratory were eager to improve the technical problems of the components and finally optimize the beam profile. The finally extracted beam current is critically depends on the initially extracted beam from the ion source injection system (ISIS). The ISIS is composed of several electrical instruments. The voltage or current which is applied to these components can affect the finally extracted beam profile. However, the original values for the input voltage or current is almost fixed to special values that had been written in the operation manual. It means that the bad condition of this cyclotron cannot be matched for these values which had been conducted in the best condition of the operation. So, by using the programmable logic controller (PLC), it is possible to use varying inputs in various conditions, and the beam current is able to be stabilized much better than applying the constant input values. Finally, this paper would show the tendency of the plasma generation in terms of modulating the applying input values which occurs inside the ion source chamber. It represents the plasma characteristics that critically influence the beam current.
	Poster THP15 [2.407 MB]
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Paper

Title

Other Keywords

Page

TUA02

Challenges in Fast Beam Current Control Inside the Cyclotron for Fast Beam Delivery in Proton Therapy

proton, cyclotron, controls, target

126

S. Psoroulas, C. Bula, P. Fernandez Carmona, G. Klimpki, D. Meer, D.C. Weber
PSI, Villigen PSI, Switzerland
D.C. Weber
University of Zurich, University Hospital, Zurich, Switzerland

Funding: G. Klimpki's work is supported by the "Giuliana and Giorgio Stefanini Foundation"
The COMET cyclotron* at PSI has been successfully used to treat patients with static tumors using the spot scanning technique, i.e. sequentially irradiating different positions inside the tumor volume. Irradiation time for each position ranges from micro- to milliseconds, with total treatment duration of about a minute. For some tumors (e.g. lung) physiological motion (e.g. respiration) interferes with the scanning motion of the beam, lowering treatment quality**. For such mobile tumors, we are developing a new technique called continuous line scanning (CLS), aiming at reducing treatment time by more than 50%. In CLS, dose rate should stabilize (within few percent) within tenths of a millisecond. We thus implemented a first prototype for fast, real-time beam control: a PID controller sets the internal electrostatic vertical deflector of the accelerator, regulating the beam current output based on the instantaneous current measured just before the patient and the knowledge of the transmission from the accelerator to the patient. In pre-clinical experiments, we achieved good control of the global dose delivered; open issues will be tackled in the next version of the controller.
*Schippers, J. M., et al (2007). NUCL INSTRUM METH B, 261(1-2), 773–776.
**Phillips, M. H., et al (1992). PMB 37(1), 223–233.

Slides TUA02 [1.790 MB]

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TUP02

Cold Cathode Ion Source for IBA CYCLONE®230

cathode, ion, ion-source, cyclotron

164

P. Cailliau, J.C. Amelia, J. Brison, E. Forton
IBA, Louvain-la-Neuve, Belgium
M. Conjat, J. Mandrillon, P. Mandrillon
AIMA, Nice, France

At IBA, we use a P.I.G. floating cathode ion source for injection in the CYCLONE®230 cyclotron. The purpose of the project is to investigate how the pre-sent ion source could be replaced by a P.I.G. cold cathodes one with a longer lifetime. Experiments de-scribed in this article were done on a dedicated test setup to benchmark the different modes. A new chimney design has been developed to test cold cath-ode mode in CYCLONE®230 without any other me-chanical modifications.

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TUP10

A New Concept of High Current Power Supply for the Main Cyclotron Magnet at TRIUMF

controls, TRIUMF, cyclotron, interface

186

S. Carrozza, F. Burini, E. Ferrari, M.P. Pretelli, G.T. Taddia
OCEM, Valsamoggia, Italy
M.C. Bastos, G. Hudson, Q. King, G. Le Godec
CERN, Geneva, Switzerland
I.V. Bylinskii, W. L. Louie, R.B. Nussbaumer
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

A sophisticated power supply was studied and de-signed to supply a high current to the main magnet of the TRIUMF cyclotron. The power supply will be operated with a current up to 20000 A in DC mode. It has been designed using a modular approach, with a 12-pulse input rectifier and two DC link which feeds sixteen DC/DC chopper modules in parallel connection. The conceived power supply integrates a sophisticated control and a precise current measurement chain devel-oped at CERN for the Large Hadron Collider (LHC). This paper presents the solution described in the de-sign report, the choice of the main purchased components which will lead to a final assembly and test before the end of 2016.

Poster TUP10 [1.076 MB]

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THP07

Development of Control System for 10 MeV Cyclotron

controls, cyclotron, vacuum, PLC

319

M. Hassani, H. Afarideh, Y. Ghorashinejad
AUT, Tehran, Iran

AmirKabir University of Technology is developing a 10 MeV cyclotron to produce radio isotopes. In order to operate the cyclotron stably, all sub-systems in the cyclotron are controlled and monitored consistently. The control system has been developed based on PLC and the operation is monitored by HMI permanently. Also, the control console located in the control room, provides data logging and controlling different steps of operation by the operator. In addition, the system can be remotely accessed over the network to monitor the status of cyclotron easily. The configuration of the control system for 10MeV cyclotron will be presented in this paper.

Poster THP07 [1.257 MB]

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THP15

Analysis of the Plasma Characteristics for Beam Current Optimization for TR-13 Cyclotron

plasma, ion, ion-source, extraction

339

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

There is a TR-13 cyclotron that extracts energy of 13 MeV protons which is located in Sungkyunkwan University. The components of the whole cyclotron are so old that cannot reproduce the situation that had been operated generally. So the researchers in this laboratory were eager to improve the technical problems of the components and finally optimize the beam profile. The finally extracted beam current is critically depends on the initially extracted beam from the ion source injection system (ISIS). The ISIS is composed of several electrical instruments. The voltage or current which is applied to these components can affect the finally extracted beam profile. However, the original values for the input voltage or current is almost fixed to special values that had been written in the operation manual. It means that the bad condition of this cyclotron cannot be matched for these values which had been conducted in the best condition of the operation. So, by using the programmable logic controller (PLC), it is possible to use varying inputs in various conditions, and the beam current is able to be stabilized much better than applying the constant input values. Finally, this paper would show the tendency of the plasma generation in terms of modulating the applying input values which occurs inside the ion source chamber. It represents the plasma characteristics that critically influence the beam current.

Poster THP15 [2.407 MB]

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