ECRIS2010 - List of Keywords (heavy-ion)

Paper	Title	Other Keywords	Page
MOCOAK01	SECRAL Status and First Beam Test at 24GHz	ion, ECR, ion-source, plasma	1
	H.W. Zhao, Y. Cao, Y.C. Feng, X.H. Guo, J.Y. Li, W. Lu, L.T. Sun, D. Xie, X.Z. Zhang, H. Zhao IMP, Lanzhou, People's Republic of China
	SECRAL has been in routine operation at 18GHz for HIRFL (Heavy Ion Research Facility in Lanzhou) accelerator complex since May 2007. It has delivered many highly charged heavy ion beams for the HIRFL accelerator and the total beam time so far has exceeded 3000 hours. To further enhance the SECRAL performance, a 24GHz/7kW gyrotron microwave amplifier has been installed and tested. Very exciting results were produced with quite a few new record highly-charged ion beam intensities. Bremstrahlung measurements at 24GHz have shown that X-ray is much stronger at higher RF frequency, higher RF power and higher minimum B field. Beam emittance study has been conducted in order to improve the beam brightness. An additional cryostat with five GM cryocoolers was installed atop the SECRAL to liquefy the boil-off helium gas to minimize the liquid helium consumption. The latest results and reliable long-term operation for the accelerator have once again demonstrated that SECRAL is one of the best performance ECR ion source for the production of highly-charged heavy ion beams. Detailed and future developments of SECRAL will be presented.
	Slides MOCOAK01 [4.739 MB]

MOCOAK03	Status of RIKEN SC-ECRIS	ion, ECR, ion-source, ECRIS	8
	T. Nakagawa, Y. Higurashi, J. Ohnishi RIKEN Nishina Center, Wako, Japan T. Aihara, M. Tamura SHI Accelerator Service Ltd., Tokyo, Japan
	To increase the beam intensity of highly charged heavy ions for RIKEN RIBF project, we constructed and tested RIKEN new SC-ECRIS. After obtaining the first beam in the spring of 2009, we tried to optimize the ion source condition for maximizing the beam intensity with 18GHz microwave. In this experiment, we intensively studied the effect of the magnetic field gradient and ECR zone size on the beam intensity. In this experiment, it was clearly seen that the gentler field gradient and lager ECR zone size give higher beam intensity. Based on these studies, we produced 550μA of Ar¹¹⁺ and 350μA of Ar¹²⁺ at the RF power of 1.8kW. In this summer, we will try use the 28GHz microwaves to increase the beam intensity. In this contribution, we present the structure of the SC-ECRIS and the results of test experiments with 18 GHz microwave in detail. We also present the future plan to increase the beam intensity.
	Slides MOCOAK03 [2.366 MB]

MOPOT001	Operation of KeiGM for the Carbon Ion Therapy Facility at Gunma University	ion, extraction, ion-source, vacuum	40
	M. Muramatsu, S. Hojo, A. Kitagawa NIRS, Chiba-shi, Japan Y. Kijima Mitsubishi Electric Corp., Energy & Public Infrastructure Systems Center, Kobe, Japan H. Miyazaki, K. Sawada, T. Ueno SHI, Ehime, Japan K. Torikai, S. Yamada Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan M. Tsuchiyama, S. Ueda Mitsubishi Electric Corp., Energy Systems Centre, Kobe, Japan
	Carbon-ion radiotherapy has been carried out at Gunma University Heavy Ion Medical Centre (GHMC) since March 2010. A compact ECR ion source for GHMC, so-called KeiGM, supplies C⁴⁺ ions for treatment. A microwave source with the traveling-wave-tube was adopted for KeiGM, with a frequency range and maximum power of 9.75 - 10.25 GHz and 750 W, respectively. KeiGM was operated from March to May 2010 for the clinical trial without any trouble and maintenance. KeiGM supplied the carbon ions from 7:30 in the morning to 0:00 midnight on weekdays. Sometimes it was operated for the beam tuning of accelerator on Saturday and Sunday too. The operation time of KeiGM for two months was about 780 hours. Although the beam intensity decreased by 20% at first, it has been constant for the last two months. The beam intensity of C⁴⁺ was 200 euA at 30 kV extraction in May 2010. The fluctuation of beam intensity was less than 10%. The operation parameters were as follows; the microwave frequency and power were 10.042 GHz and 300 W, respectively. CH4 gas was fed, and the gas flowrate was 0.054 cc/min. The extraction voltage was 30 kV. The repetition frequency and pulse width were 0.36 Hz and 50 msec, respectively. Gunma University has successfully treated the first 12 patients for the clinical trial, thus the Japanese Ministry of Health and Labor Welfare approved GHMC as “advanced medicine”. We will report the operation of KeiGM and the status of their daily treatment.
	Poster MOPOT001 [2.685 MB]

TUCOAK01	First A/Q=3 Beams of Phoenix V2 on the Heavy Ions Low Energy Beam Transport Line of SPIRAL2	ion, ion-source, ECRIS, dipole	75
	C. Peaucelle IN2P3 IPNL, Villeurbanne, France J. Angot, P. Grandemange, T. Lamy, T. Thuillier LPSC, Grenoble Cedex, France J.-L. Biarrotte IPN, Orsay, France D. Uriot CEA/DSM/IRFU, France
	The heavy ions low energy beam transport line (LEBT) of Spiral2 built at LPSC Grenoble is fully operational since the beginning of 2010. This LEBT has been calculated and designed to hold permanently 15 mA of multicharged ions extracted from the source at 60 kV. PHOENIX V2 ECRIS is presently installed on the LEBT and first tests started few months ago: A reliable beam of 1 mAe of O⁶⁺ beam at 45 kV has already been obtained for a long period with a very good transmission, and good reproducibility. Tests continue with an optimization of Ar¹²⁺ beam performance. The promising results of these first runs, particularly emittance measurements, profiles and optimization of charge optics will be presented along. The ECRIS Phoenix V2 and different equipments installed on this line (vacuum system, optic elements, diagnostics) will be described. The future program and planned improvements on the LEBT will be also discussed in this paper.
	Slides TUCOAK01 [2.402 MB]

Paper

Title

Other Keywords

Page

MOCOAK01

SECRAL Status and First Beam Test at 24GHz

ion, ECR, ion-source, plasma

1

H.W. Zhao, Y. Cao, Y.C. Feng, X.H. Guo, J.Y. Li, W. Lu, L.T. Sun, D. Xie, X.Z. Zhang, H. Zhao
IMP, Lanzhou, People's Republic of China

SECRAL has been in routine operation at 18GHz for HIRFL (Heavy Ion Research Facility in Lanzhou) accelerator complex since May 2007. It has delivered many highly charged heavy ion beams for the HIRFL accelerator and the total beam time so far has exceeded 3000 hours. To further enhance the SECRAL performance, a 24GHz/7kW gyrotron microwave amplifier has been installed and tested. Very exciting results were produced with quite a few new record highly-charged ion beam intensities. Bremstrahlung measurements at 24GHz have shown that X-ray is much stronger at higher RF frequency, higher RF power and higher minimum B field. Beam emittance study has been conducted in order to improve the beam brightness. An additional cryostat with five GM cryocoolers was installed atop the SECRAL to liquefy the boil-off helium gas to minimize the liquid helium consumption. The latest results and reliable long-term operation for the accelerator have once again demonstrated that SECRAL is one of the best performance ECR ion source for the production of highly-charged heavy ion beams. Detailed and future developments of SECRAL will be presented.

Slides MOCOAK01 [4.739 MB]

MOCOAK03

Status of RIKEN SC-ECRIS

ion, ECR, ion-source, ECRIS

8

T. Nakagawa, Y. Higurashi, J. Ohnishi
RIKEN Nishina Center, Wako, Japan
T. Aihara, M. Tamura
SHI Accelerator Service Ltd., Tokyo, Japan

To increase the beam intensity of highly charged heavy ions for RIKEN RIBF project, we constructed and tested RIKEN new SC-ECRIS. After obtaining the first beam in the spring of 2009, we tried to optimize the ion source condition for maximizing the beam intensity with 18GHz microwave. In this experiment, we intensively studied the effect of the magnetic field gradient and ECR zone size on the beam intensity. In this experiment, it was clearly seen that the gentler field gradient and lager ECR zone size give higher beam intensity. Based on these studies, we produced 550μA of Ar¹¹⁺ and 350μA of Ar¹²⁺ at the RF power of 1.8kW. In this summer, we will try use the 28GHz microwaves to increase the beam intensity. In this contribution, we present the structure of the SC-ECRIS and the results of test experiments with 18 GHz microwave in detail. We also present the future plan to increase the beam intensity.

Slides MOCOAK03 [2.366 MB]

MOPOT001

Operation of KeiGM for the Carbon Ion Therapy Facility at Gunma University

ion, extraction, ion-source, vacuum

40

M. Muramatsu, S. Hojo, A. Kitagawa
NIRS, Chiba-shi, Japan
Y. Kijima
Mitsubishi Electric Corp., Energy & Public Infrastructure Systems Center, Kobe, Japan
H. Miyazaki, K. Sawada, T. Ueno
SHI, Ehime, Japan
K. Torikai, S. Yamada
Gunma University, Heavy-Ion Medical Research Center, Maebashi-Gunma, Japan
M. Tsuchiyama, S. Ueda
Mitsubishi Electric Corp., Energy Systems Centre, Kobe, Japan

Carbon-ion radiotherapy has been carried out at Gunma University Heavy Ion Medical Centre (GHMC) since March 2010. A compact ECR ion source for GHMC, so-called KeiGM, supplies C⁴⁺ ions for treatment. A microwave source with the traveling-wave-tube was adopted for KeiGM, with a frequency range and maximum power of 9.75 - 10.25 GHz and 750 W, respectively. KeiGM was operated from March to May 2010 for the clinical trial without any trouble and maintenance. KeiGM supplied the carbon ions from 7:30 in the morning to 0:00 midnight on weekdays. Sometimes it was operated for the beam tuning of accelerator on Saturday and Sunday too. The operation time of KeiGM for two months was about 780 hours. Although the beam intensity decreased by 20% at first, it has been constant for the last two months. The beam intensity of C⁴⁺ was 200 euA at 30 kV extraction in May 2010. The fluctuation of beam intensity was less than 10%. The operation parameters were as follows; the microwave frequency and power were 10.042 GHz and 300 W, respectively. CH4 gas was fed, and the gas flowrate was 0.054 cc/min. The extraction voltage was 30 kV. The repetition frequency and pulse width were 0.36 Hz and 50 msec, respectively. Gunma University has successfully treated the first 12 patients for the clinical trial, thus the Japanese Ministry of Health and Labor Welfare approved GHMC as “advanced medicine”. We will report the operation of KeiGM and the status of their daily treatment.

Poster MOPOT001 [2.685 MB]

TUCOAK01

First A/Q=3 Beams of Phoenix V2 on the Heavy Ions Low Energy Beam Transport Line of SPIRAL2

ion, ion-source, ECRIS, dipole

75

C. Peaucelle
IN2P3 IPNL, Villeurbanne, France
J. Angot, P. Grandemange, T. Lamy, T. Thuillier
LPSC, Grenoble Cedex, France
J.-L. Biarrotte
IPN, Orsay, France
D. Uriot
CEA/DSM/IRFU, France

The heavy ions low energy beam transport line (LEBT) of Spiral2 built at LPSC Grenoble is fully operational since the beginning of 2010. This LEBT has been calculated and designed to hold permanently 15 mA of multicharged ions extracted from the source at 60 kV. PHOENIX V2 ECRIS is presently installed on the LEBT and first tests started few months ago: A reliable beam of 1 mAe of O⁶⁺ beam at 45 kV has already been obtained for a long period with a very good transmission, and good reproducibility. Tests continue with an optimization of Ar¹²⁺ beam performance. The promising results of these first runs, particularly emittance measurements, profiles and optimization of charge optics will be presented along. The ECRIS Phoenix V2 and different equipments installed on this line (vacuum system, optic elements, diagnostics) will be described. The future program and planned improvements on the LEBT will be also discussed in this paper.

Slides TUCOAK01 [2.402 MB]