CYCLOTRONS 2010 - List of Keywords (induction)

Paper	Title	Other Keywords	Page
MOPCP107	A Design of Switch Magnet Power Supply	power-supply, controls, pulsed-power, simulation	266
	H.H. Yan, Y.X. Chen, X.M. Feng, D.Q. Gao, Y.L. Gao, J.B. Shangguan, Y. Tang, J.Y. Xin, H.B. Yan, Z.D. Yuan, X.L. Zhang, Z.Z. Zhou IMP, Lanzhou, People's Republic of China
	The paper introduces a design of power supply for switch magnet in HIRFL. The main circuit topology used Buck chopper regulator, full-bridge inverter output and power units in parallel in the power supply is introduced. The operation principle and control strategy is analyzed in this article. The power supply can be operated in DC and pulse mode, has the very good output current long-term stability, high reliability and dynamic response characteristics. Finally, some experimental data and waveforms of the power supply are shown to demonstrate the performance of the design.

TUM1CCO04	The VARIAN 250 MeV Superconducting Compact Proton Cyclotron: Medical Operation of the 2nd Machine, Production and Commissioning Status of Machines No. 3 to 7	cyclotron, proton, factory, controls	283
	H. Röcken, M. Abdel-Bary, E.M. Akcoeltekin, P. Budz, T. Stephani, J.C. Wittschen VMS-PT, Bergisch Gladbach, Germany
	Varian Medical Systems Particle Therapy (the former ACCEL) has successfully finalized in 2008 the commissioning of its 2nd superconducting compact proton cyclotron for use in proton therapy. The 250 MeV machine serves as proton source for treatments at the first clinical proton therapy center in Germany which opened in early 2009. Furthermore, Varian is currently commissioning and factory testing its 3rd machine. We report on the operation and performance of the 2nd machine as well as on the successful cool-down, quench testing, and magnetic shimming of the 3rd machine. In addition we present RF commissioning plans using a newly developed solid state amplifier, and plans for the upcoming factory beam commissioning in the new Varian cyclotron test cell, scheduled for October 2010. Finally we provide a brief status and outlook on machines no. 4 to 7.
	Slides TUM1CCO04 [5.761 MB]

TUA2CCO02	Induction Sector Cyclotron for Cluster Ions	acceleration, ion, cyclotron, focusing	314
	K. Takayama, T. Adachi KEK, Ibaraki, Japan W. Jiang Nagaoka University of Technology, Nagaoka, Niigata, Japan Y. Oguri TIT, Tokyo, Japan H. Tsutsui SHI, Tokyo, Japan
	Funding: supported by Grant-in-Aid for Exploratory Research (KAKENHI 22265403) A novel scheme of a sector cyclotron to accelerate extremely heavy cluster ions, called 'Induction Sector Cyclotron (ISC)', is described [1]. Its key feature is fast induction acceleration, which has been already demonstrated using the KEK 12 GeV proton synchrotron [2]. An ion bunch is accelerated and captured with pulse voltages generated by transformers. The acceleration and confinement in the longitudinal direction can be independently handled. The transformers are energized by the corresponding switching power supply, in which power solid-state devices are employed as switching elements and their turning on/off is maneuvered by gate signals digitally manipulated from the circulating beam signal of an ion bunch. Consequently the acceleration synchronizing with the revolution of any ion beam is always guaranteed. A cluster ion beam such as C-60, which so far there has been no way to repeatedly accelerate, can be accelerated from an extremely low velocity to a nearly light velocity. Its fundamental concept, beam dynamics, required key devices, and life time of a cluster ion beam will be discussed. A typical example of ISC is proposed at the conference. [1] K.Takayama et al., submitted to Phys. Rev. Lett. (2010). [2] K.Takayama et al., Phys. Rev. Lett. 98, 054801 (2007), K.Takayama and R.Briggs (Eds.), 'Induction Accelerators' (Springer, 2010).
	Slides TUA2CCO02 [1.781 MB]

Paper

Title

Other Keywords

Page

MOPCP107

A Design of Switch Magnet Power Supply

power-supply, controls, pulsed-power, simulation

266

H.H. Yan, Y.X. Chen, X.M. Feng, D.Q. Gao, Y.L. Gao, J.B. Shangguan, Y. Tang, J.Y. Xin, H.B. Yan, Z.D. Yuan, X.L. Zhang, Z.Z. Zhou
IMP, Lanzhou, People's Republic of China

The paper introduces a design of power supply for switch magnet in HIRFL. The main circuit topology used Buck chopper regulator, full-bridge inverter output and power units in parallel in the power supply is introduced. The operation principle and control strategy is analyzed in this article. The power supply can be operated in DC and pulse mode, has the very good output current long-term stability, high reliability and dynamic response characteristics. Finally, some experimental data and waveforms of the power supply are shown to demonstrate the performance of the design.

TUM1CCO04

The VARIAN 250 MeV Superconducting Compact Proton Cyclotron: Medical Operation of the 2nd Machine, Production and Commissioning Status of Machines No. 3 to 7

cyclotron, proton, factory, controls

283

H. Röcken, M. Abdel-Bary, E.M. Akcoeltekin, P. Budz, T. Stephani, J.C. Wittschen
VMS-PT, Bergisch Gladbach, Germany

Varian Medical Systems Particle Therapy (the former ACCEL) has successfully finalized in 2008 the commissioning of its 2nd superconducting compact proton cyclotron for use in proton therapy. The 250 MeV machine serves as proton source for treatments at the first clinical proton therapy center in Germany which opened in early 2009. Furthermore, Varian is currently commissioning and factory testing its 3rd machine. We report on the operation and performance of the 2nd machine as well as on the successful cool-down, quench testing, and magnetic shimming of the 3rd machine. In addition we present RF commissioning plans using a newly developed solid state amplifier, and plans for the upcoming factory beam commissioning in the new Varian cyclotron test cell, scheduled for October 2010. Finally we provide a brief status and outlook on machines no. 4 to 7.

Slides TUM1CCO04 [5.761 MB]

TUA2CCO02

Induction Sector Cyclotron for Cluster Ions

acceleration, ion, cyclotron, focusing

314

K. Takayama, T. Adachi
KEK, Ibaraki, Japan
W. Jiang
Nagaoka University of Technology, Nagaoka, Niigata, Japan
Y. Oguri
TIT, Tokyo, Japan
H. Tsutsui
SHI, Tokyo, Japan

Funding: supported by Grant-in-Aid for Exploratory Research (KAKENHI 22265403)
A novel scheme of a sector cyclotron to accelerate extremely heavy cluster ions, called 'Induction Sector Cyclotron (ISC)', is described [1]. Its key feature is fast induction acceleration, which has been already demonstrated using the KEK 12 GeV proton synchrotron [2]. An ion bunch is accelerated and captured with pulse voltages generated by transformers. The acceleration and confinement in the longitudinal direction can be independently handled. The transformers are energized by the corresponding switching power supply, in which power solid-state devices are employed as switching elements and their turning on/off is maneuvered by gate signals digitally manipulated from the circulating beam signal of an ion bunch. Consequently the acceleration synchronizing with the revolution of any ion beam is always guaranteed. A cluster ion beam such as C-60, which so far there has been no way to repeatedly accelerate, can be accelerated from an extremely low velocity to a nearly light velocity. Its fundamental concept, beam dynamics, required key devices, and life time of a cluster ion beam will be discussed. A typical example of ISC is proposed at the conference.
[1] K.Takayama et al., submitted to Phys. Rev. Lett. (2010).
[2] K.Takayama et al., Phys. Rev. Lett. 98, 054801 (2007),
K.Takayama and R.Briggs (Eds.), 'Induction Accelerators' (Springer, 2010).

Slides TUA2CCO02 [1.781 MB]