ECRIS-2014 - List of Keywords (rfq)

Paper	Title	Other Keywords	Page
MOPPH004	Status Report at the Heidelberg Ion-Beam Therapy (HIT) Ion Sources and the Testbench	ion, ion-source, operation, ECR	49
	T.W. Winkelmann, R. Cee, Th. Haberer, B. Naas, A. Peters, J. Schreiner HIT, Heidelberg, Germany E. Ritter DREEBIT GmbH, Dresden, Germany
	Since October 2009 more than 2000 patients were treated at HIT. In a 24/7 operation scheme two 14.5 GHz electron cyclotron resonance ion sources are routinely used to produce protons and carbon ions. The integration of a third ion source into the production facility was done in summer 2013 to produce a helium beam. This paper will give a status report of the ion source operating experience and statistics and will summarize the enhancement activities, which were undertaken at an in-house ion source testbench.

MOPPH006	Direct Injection of Intense Heavy Ion Beams from a High Field ECR Ion Source into an RFQ	ion, ECR, ion-source, extraction	52
	G.O. Rodrigues, D. Kanjilal IUAC, New Delhi, India R. Becker IAP, Frankfurt am Main, Germany R.W. Hamm R&M Technical Enterprises, Pleasanton, California, USA
	Beam intensities achievable from high performance ECR sources for highly charged ions are limited by the high space charge. For high performance ECR sources, the stray magnetic field of the source can provide focusing against the space charge blow-up of the beam in addition to the Direct Plasma Injection Scheme (DPIS) adapted from laser ion sources. A combined extraction/matching system* has been designed for direct injection into a radio frequency quadrupole (RFQ) accelerator, allowing a total beam current of 10 mA for the production of highly charged 238U⁴⁰⁺ (1.33 mA) to be injected at an ion source voltage of 60 kV. In this design, the features of IGUN have been used to take into account the rf-focusing of an RFQ channel (without modulation), the electrostatic field between ion source extraction and the RFQ vanes, the magnetic stray field of the ECR superconducting solenoid, and the defocusing space charge of an ion beam. The RFQ has been designed to suppress neighbouring charge states and to work as a filter for the desired 238U⁴⁰⁺. This reduces the transport problem for the beam line as well as it reduces the emittance for the selected charge state. * R. Becker et al., PROC. EPAC-2004, TUPLT024 ** G.Rodrigues et al., Rev. Sci.Instrum. 85,02A740 (2014)

WEOMMH02	First Commissioning Results of An Evaporative Cooling Magnet ECRIS-LECR4	ion, ion-source, ECR, extraction	107
	W. Lu, Y.C. Feng, S.Q. Guo, B.H. Ma, H.Y. Ma, L.T. Sun, X.Z. Zhang, H.W. Zhao IMP, Lanzhou, People's Republic of China L. Ruan, B. Xiong IEE, Beijing, People's Republic of China
	LECR4 (Lanzhou ECR ion source No.4) is a room temperature ECR ion source, designed to produce high current, multiple charge state ions for SSC-linac project at IMP. The ion source has been optimized to be operated at 18 GHz. A unique feature of LECR4 is that all its solenoid coils are fully immersed in a special medium and cooled by evaporative cooling technology when excited. At design current, the coils can produce peak mirror fields on axis 2.3 Tesla at injection, 1.3 Tesla at extraction and 0.5 Tesla at minimum-B. The nominal radial magnetic field is 1.1 Tesla at plasma chamber wall, which is produced by a Halbach structure 36-segment hexapole. Recently, the project has made significant progress. In January 2014, the first plasma at 18 GHz was ignited. During the ongoing commissioning phase with a stainless steel chamber, tests with gaseous ion beams have been conducted. Some intense ion beams have been produced with microwave power less than 1.5 kW, such as 1.97 emA of O⁶⁺, 1.7 emA of Ar⁸⁺, 1.07 emA of Ar⁹⁺, 290 euA of Xe²⁰⁺ and so on. In this paper, the design of LECR4 ion source will be presented, and the latest test results will also be given.
	Slides WEOMMH02 [3.543 MB]

Paper

Title

Other Keywords

Page

MOPPH004

Status Report at the Heidelberg Ion-Beam Therapy (HIT) Ion Sources and the Testbench

ion, ion-source, operation, ECR

49

T.W. Winkelmann, R. Cee, Th. Haberer, B. Naas, A. Peters, J. Schreiner
HIT, Heidelberg, Germany
E. Ritter
DREEBIT GmbH, Dresden, Germany

Since October 2009 more than 2000 patients were treated at HIT. In a 24/7 operation scheme two 14.5 GHz electron cyclotron resonance ion sources are routinely used to produce protons and carbon ions. The integration of a third ion source into the production facility was done in summer 2013 to produce a helium beam. This paper will give a status report of the ion source operating experience and statistics and will summarize the enhancement activities, which were undertaken at an in-house ion source testbench.

MOPPH006

Direct Injection of Intense Heavy Ion Beams from a High Field ECR Ion Source into an RFQ

ion, ECR, ion-source, extraction

52

G.O. Rodrigues, D. Kanjilal
IUAC, New Delhi, India
R. Becker
IAP, Frankfurt am Main, Germany
R.W. Hamm
R&M Technical Enterprises, Pleasanton, California, USA

Beam intensities achievable from high performance ECR sources for highly charged ions are limited by the high space charge. For high performance ECR sources, the stray magnetic field of the source can provide focusing against the space charge blow-up of the beam in addition to the Direct Plasma Injection Scheme (DPIS) adapted from laser ion sources*. A combined extraction/matching system** has been designed for direct injection into a radio frequency quadrupole (RFQ) accelerator, allowing a total beam current of 10 mA for the production of highly charged 238U⁴⁰⁺ (1.33 mA) to be injected at an ion source voltage of 60 kV. In this design, the features of IGUN have been used to take into account the rf-focusing of an RFQ channel (without modulation), the electrostatic field between ion source extraction and the RFQ vanes, the magnetic stray field of the ECR superconducting solenoid, and the defocusing space charge of an ion beam. The RFQ has been designed to suppress neighbouring charge states and to work as a filter for the desired 238U⁴⁰⁺. This reduces the transport problem for the beam line as well as it reduces the emittance for the selected charge state.
* R. Becker et al., PROC. EPAC-2004, TUPLT024
** G.Rodrigues et al., Rev. Sci.Instrum. 85,02A740 (2014)

WEOMMH02

First Commissioning Results of An Evaporative Cooling Magnet ECRIS-LECR4

ion, ion-source, ECR, extraction

107

W. Lu, Y.C. Feng, S.Q. Guo, B.H. Ma, H.Y. Ma, L.T. Sun, X.Z. Zhang, H.W. Zhao
IMP, Lanzhou, People's Republic of China
L. Ruan, B. Xiong
IEE, Beijing, People's Republic of China

LECR4 (Lanzhou ECR ion source No.4) is a room temperature ECR ion source, designed to produce high current, multiple charge state ions for SSC-linac project at IMP. The ion source has been optimized to be operated at 18 GHz. A unique feature of LECR4 is that all its solenoid coils are fully immersed in a special medium and cooled by evaporative cooling technology when excited. At design current, the coils can produce peak mirror fields on axis 2.3 Tesla at injection, 1.3 Tesla at extraction and 0.5 Tesla at minimum-B. The nominal radial magnetic field is 1.1 Tesla at plasma chamber wall, which is produced by a Halbach structure 36-segment hexapole. Recently, the project has made significant progress. In January 2014, the first plasma at 18 GHz was ignited. During the ongoing commissioning phase with a stainless steel chamber, tests with gaseous ion beams have been conducted. Some intense ion beams have been produced with microwave power less than 1.5 kW, such as 1.97 emA of O⁶⁺, 1.7 emA of Ar⁸⁺, 1.07 emA of Ar⁹⁺, 290 euA of Xe²⁰⁺ and so on. In this paper, the design of LECR4 ion source will be presented, and the latest test results will also be given.

Slides WEOMMH02 [3.543 MB]