ECRIS2016 - List of Keywords (experiment)

Paper	Title	Other Keywords	Page
MOBO04	Recent Developments of RIKEN 28 GHz SC-ECRIS	ion, ECR, emittance, ion-source	10
	Y. Higurashi, H. Haba, M. Kidera, T. Nakagawa, J. Ohnishi, K. Ozeki RIKEN Nishina Center, Wako, Japan
	In the past two years, we tried to improve the performance of the RIKEN 28GHz SC-ECRIS for production of intense U ion beam. Usually, we used the sputtering method to produce U ion beam. Last year, we produced ~200e μA of U³⁵⁺ at the injected RF power of ~2.6kW, when slightly adding the U vapor with high temperature oven. For RIKEN RIBF experiment, we produced ~110 e μA of U³⁵⁺ beam with sputtering method longer than one month without break. In this case, we surly need very stable beam to increase the transmission efficiency in the accelerators and avoid the any damage of the components of the accelerator due to the high power beam. In this contribution, we will report the beam intensity of highly charged U ions as a function of various parameters (magnetic field strength, RF power, sputtering voltage etc.) and the effect of these parameters on the beam stability in detail. We also present the experience of the long term operation of the ion source for the RIKEN RIBF experiments.
	Slides MOBO04 [3.427 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOBO04
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOFO01	SPIRAL1 Charge Breeder: Performances and Status	ion, injection, operation, plasma	35
	L. Maunoury, O. Bajeat, C. Barthe-Dejean, P. Delahaye, M. Dubois, R. Frigot, P. Jardin, A. Jeanne, O. Kamalou, P. Lecomte, O. Osmond, G. Peschard, A. Savalle GANIL, Caen, France J. Angot, T. Lamy, P. Sole LPSC, Grenoble Cedex, France
	In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breeder based on a LPSC Phoenix ECRIS, first tested at ISOLDE* has been modified as to benefit of the last enhancements of this device from the 1+ / n+ community*. Prior to its installation in the middle of the low energy beam line of the SPIRAL1 facility, it has been tested at the 1+/n+ LPSC test bench to validate its operation performances. Charge breeding efficiencies as well as charge breeding times have been measured for noble gases and alkali elements. The experimental results demonstrated that the modifications done were on the right track leading the SPIRAL1 charge breeder to the top worldwide in terms of performances. The experimental outcomes have proved the strong interrelationship between the charge breeding efficiency and the charge breeding times which are still under active discussion. P. Delahaye et al, Review of Scientific Instruments. 77, 03B105 (2006) ** R. Vondrasek et al, Review of Scientific Instruments 83 113303 (2012)
	Slides MOFO01 [10.461 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOFO01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEAO03	Practical Comparison of Two-Frequency Heating Phenomena in Different ECR Ion Sources	ion, ECR, plasma, ECRIS	55
	A. Kitagawa NIRS, Chiba-shi, Japan S. Biri, R. Rácz ATOMKI, Debrecen, Hungary Y. Kato Osaka University, Graduate School of Engineering, Osaka, Japan M. Muramatsu National Institute of Radiological Sciences, Chiba, Japan W. Takasugi AEC, Chiba, Japan
	In order to improve highly-charged ion production from the 18GHz NIRS-HEC ECRIS, our group has studied the mixture of two microwaves of which the frequencies were close together each. Our conclusion was that when an additional microwave is added to the primary microwave, the plasma stability is improved. The output current of the highly charged ion beam was proportional to the total power of both microwaves. The dependence on the additional frequency showed the fine structure. Since this structure depended on the magnetic field, vacuum pressure, and so on, the precise frequency adjustment for maximum output was required under each condition. Our interest is whether the above-mentioned phenomenon can be demonstrated using a different ion source where the two frequencies are even far from each other. We installed a 17.75-18.25 GHz microwave system in addition to the 14.3 GHz klystron amplifier of the ATOMKI ECRIS. Argon output currents at various values of the microwave power and frequency were studied. The dependence on the total power shows the similar tendency as at NIRS. The dependence on the additional frequency also shows the fine structure. Detailed data will be presented.
	Slides WEAO03 [4.648 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEAO03
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEBO01	An ECRIS Facility for Investigating Nuclear Reactions in Astrophysical Plasmas	ion, target, ECR, electron	59
	M. Kreller, C. Baumgart, G. Zschornack DREEBIT, Dresden, Germany K. Czerski, M. Kaczmarski, N. Targosz-Ślęczka University of Szczecin, Institute of Physics, Szczecin, Poland A. Huke, G. Ruprecht, D. Weißbach IFK Berlin, Berlin, Germany G. Zschornack Technische Universität Dresden, Institut für Angewandte Physik, Dresden, Germany
	Nuclear reactions at low energies can be strongly enhanced due to screening of the Coulomb barrier by the surrounding electrons. This effect was studied for the deuteron fusion reactions taking place in metallic environments as a model for dense astrophysical plasmas. Experimentally determined screening energies corresponding to the reduction of the Coulomb barrier height are much larger than the theoretical predictions. One possible explanation is the excitation of a hypothetical threshold resonance in the 4He nucleus. As the energy dependence of the resonant reaction cross section differs to that of the electron screening effect, one can distinguish between both processes expanding measurements down to the deuteron energies of 1keV. A novel ion accelerator was implemented at the University of Szczecin. Ions are produced by a Dresden ECRIS-2.45M as a high-current, low-Z ion source. The following beam line is designed to work on HV potential for decelerating ions below a kinetic energy of 1keV and combined with a ultra-high vacuum target chamber to reduce target impurities. The ion irradiation facility as well as first experimental results are described and discussed.
	Slides WEBO01 [6.711 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEBO01
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEBO02	Design of Compact ECR Ion Source for C⁵⁺ Production	ion, ion-source, ECR, operation	64
	M. Muramatsu, Y. Iwata, A. Kitagawa, E. Noda, M. Sekiguchi NIRS, Chiba-shi, Japan K. Fukushima, T. Sasano, T. Suzuki, K. Takahashi AEC, Chiba, Japan H. Murata, T. Takahashi SHI, Kanagawa, Japan
	The Heavy Ion Medical Accelerator in Chiba (HIMAC) was constructed as the first medical dedicated heavy ion accelerator facility at National Institute of Radiological Sciences (NIRS). Over 9000 cancer patients have been treated with 140-430 MeV/u carbon beams since 1994. Compact ECR ion source with all permanent magnets, named Kei2, was developed for production of C⁴⁺ ions for medical treatment at NIRS. A compact ECR ion source for Gunma University (Gunma University Heavy Ion Medical Center: GHMC), Saga carbon-ion radiotherapy (Saga Heavy Ion Medical Accelerator in Tosu: SAGA HIMAT) and Kanagawa carbon-ion radiotherapy (Ion-beam Radiation Oncology Center in Kanagawa: i-ROCK) facility has been operated for medical use. It is a copy of the Kei2 which was developed by NIRS. In order to reduce operation cost of the injector for next designed carbon ion facility, we start design of new compact ECR ion source for C⁵⁺ production. Some dependence (mirror field, microwave power and frequency) were checked for optimal parameter of C⁵⁺ production at 18 GHz NIRS-HEC source. Results of experiments and specification of new compact source are described in this presentation.
	Slides WEBO02 [4.046 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEBO02
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP14	A New ECRIS Installation at the Argonne Tandem Linac Accelerator System	ion, ECR, ion-source, operation	106
	R.H. Scott, C. Dickerson, R.C. Pardo, R.C. Vondrasek ANL, Argonne, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 and used resources of ANL's ATLAS facility, an Office of Science User Facility An existing all permanent magnet ECRIS, the BIE100 [1], will be installed at ATLAS to recover operational flexibility by providing ATLAS with a second ECR ion source for stable beams. For years ATLAS has operated with two ECR ion sources, ECR2 and the ECR charge breeder as well as a tandem electrostatic injector. The tandem was retired in 2013 and in mid-2015 the ECR charge breeder was decommissioned to make room for a new Electron Beam Ion Source exclusively for charge breeding radioactive ion beams. This left the facility with a single ECR source for virtually all stable ion beam pro-duction. Design, installation plans and anticipated opera-tional parameters are discussed. *Dan Z. Xie, Rev. Sci. Instrum. 73, 531 (2002); http://dx.doi.org/10.1063/1.1429320
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP14
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOBO04

Recent Developments of RIKEN 28 GHz SC-ECRIS

ion, ECR, emittance, ion-source

10

Y. Higurashi, H. Haba, M. Kidera, T. Nakagawa, J. Ohnishi, K. Ozeki
RIKEN Nishina Center, Wako, Japan

In the past two years, we tried to improve the performance of the RIKEN 28GHz SC-ECRIS for production of intense U ion beam. Usually, we used the sputtering method to produce U ion beam. Last year, we produced ~200e μA of U³⁵⁺ at the injected RF power of ~2.6kW, when slightly adding the U vapor with high temperature oven. For RIKEN RIBF experiment, we produced ~110 e μA of U³⁵⁺ beam with sputtering method longer than one month without break. In this case, we surly need very stable beam to increase the transmission efficiency in the accelerators and avoid the any damage of the components of the accelerator due to the high power beam. In this contribution, we will report the beam intensity of highly charged U ions as a function of various parameters (magnetic field strength, RF power, sputtering voltage etc.) and the effect of these parameters on the beam stability in detail. We also present the experience of the long term operation of the ion source for the RIKEN RIBF experiments.

Slides MOBO04 [3.427 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOBO04

Export •

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

MOFO01

SPIRAL1 Charge Breeder: Performances and Status

ion, injection, operation, plasma

35

L. Maunoury, O. Bajeat, C. Barthe-Dejean, P. Delahaye, M. Dubois, R. Frigot, P. Jardin, A. Jeanne, O. Kamalou, P. Lecomte, O. Osmond, G. Peschard, A. Savalle
GANIL, Caen, France
J. Angot, T. Lamy, P. Sole
LPSC, Grenoble Cedex, France

In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breeder based on a LPSC Phoenix ECRIS, first tested at ISOLDE* has been modified as to benefit of the last enhancements of this device from the 1+ / n+ community**. Prior to its installation in the middle of the low energy beam line of the SPIRAL1 facility, it has been tested at the 1+/n+ LPSC test bench to validate its operation performances. Charge breeding efficiencies as well as charge breeding times have been measured for noble gases and alkali elements. The experimental results demonstrated that the modifications done were on the right track leading the SPIRAL1 charge breeder to the top worldwide in terms of performances. The experimental outcomes have proved the strong interrelationship between the charge breeding efficiency and the charge breeding times which are still under active discussion.
* P. Delahaye et al, Review of Scientific Instruments. 77, 03B105 (2006)
** R. Vondrasek et al, Review of Scientific Instruments 83 113303 (2012)

Slides MOFO01 [10.461 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOFO01

Export •

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

WEAO03

Practical Comparison of Two-Frequency Heating Phenomena in Different ECR Ion Sources

ion, ECR, plasma, ECRIS

55

A. Kitagawa
NIRS, Chiba-shi, Japan
S. Biri, R. Rácz
ATOMKI, Debrecen, Hungary
Y. Kato
Osaka University, Graduate School of Engineering, Osaka, Japan
M. Muramatsu
National Institute of Radiological Sciences, Chiba, Japan
W. Takasugi
AEC, Chiba, Japan

In order to improve highly-charged ion production from the 18GHz NIRS-HEC ECRIS, our group has studied the mixture of two microwaves of which the frequencies were close together each. Our conclusion was that when an additional microwave is added to the primary microwave, the plasma stability is improved. The output current of the highly charged ion beam was proportional to the total power of both microwaves. The dependence on the additional frequency showed the fine structure. Since this structure depended on the magnetic field, vacuum pressure, and so on, the precise frequency adjustment for maximum output was required under each condition. Our interest is whether the above-mentioned phenomenon can be demonstrated using a different ion source where the two frequencies are even far from each other. We installed a 17.75-18.25 GHz microwave system in addition to the 14.3 GHz klystron amplifier of the ATOMKI ECRIS. Argon output currents at various values of the microwave power and frequency were studied. The dependence on the total power shows the similar tendency as at NIRS. The dependence on the additional frequency also shows the fine structure. Detailed data will be presented.

Slides WEAO03 [4.648 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEAO03

Export •

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

WEBO01

An ECRIS Facility for Investigating Nuclear Reactions in Astrophysical Plasmas

ion, target, ECR, electron

59

M. Kreller, C. Baumgart, G. Zschornack
DREEBIT, Dresden, Germany
K. Czerski, M. Kaczmarski, N. Targosz-Ślęczka
University of Szczecin, Institute of Physics, Szczecin, Poland
A. Huke, G. Ruprecht, D. Weißbach
IFK Berlin, Berlin, Germany
G. Zschornack
Technische Universität Dresden, Institut für Angewandte Physik, Dresden, Germany

Nuclear reactions at low energies can be strongly enhanced due to screening of the Coulomb barrier by the surrounding electrons. This effect was studied for the deuteron fusion reactions taking place in metallic environments as a model for dense astrophysical plasmas. Experimentally determined screening energies corresponding to the reduction of the Coulomb barrier height are much larger than the theoretical predictions. One possible explanation is the excitation of a hypothetical threshold resonance in the 4He nucleus. As the energy dependence of the resonant reaction cross section differs to that of the electron screening effect, one can distinguish between both processes expanding measurements down to the deuteron energies of 1keV. A novel ion accelerator was implemented at the University of Szczecin. Ions are produced by a Dresden ECRIS-2.45M as a high-current, low-Z ion source. The following beam line is designed to work on HV potential for decelerating ions below a kinetic energy of 1keV and combined with a ultra-high vacuum target chamber to reduce target impurities. The ion irradiation facility as well as first experimental results are described and discussed.

Slides WEBO01 [6.711 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEBO01

Export •

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

WEBO02

Design of Compact ECR Ion Source for C⁵⁺ Production

ion, ion-source, ECR, operation

64

M. Muramatsu, Y. Iwata, A. Kitagawa, E. Noda, M. Sekiguchi
NIRS, Chiba-shi, Japan
K. Fukushima, T. Sasano, T. Suzuki, K. Takahashi
AEC, Chiba, Japan
H. Murata, T. Takahashi
SHI, Kanagawa, Japan

The Heavy Ion Medical Accelerator in Chiba (HIMAC) was constructed as the first medical dedicated heavy ion accelerator facility at National Institute of Radiological Sciences (NIRS). Over 9000 cancer patients have been treated with 140-430 MeV/u carbon beams since 1994. Compact ECR ion source with all permanent magnets, named Kei2, was developed for production of C⁴⁺ ions for medical treatment at NIRS. A compact ECR ion source for Gunma University (Gunma University Heavy Ion Medical Center: GHMC), Saga carbon-ion radiotherapy (Saga Heavy Ion Medical Accelerator in Tosu: SAGA HIMAT) and Kanagawa carbon-ion radiotherapy (Ion-beam Radiation Oncology Center in Kanagawa: i-ROCK) facility has been operated for medical use. It is a copy of the Kei2 which was developed by NIRS. In order to reduce operation cost of the injector for next designed carbon ion facility, we start design of new compact ECR ion source for C⁵⁺ production. Some dependence (mirror field, microwave power and frequency) were checked for optimal parameter of C⁵⁺ production at 18 GHz NIRS-HEC source. Results of experiments and specification of new compact source are described in this presentation.

Slides WEBO02 [4.046 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEBO02

Export •

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

WEPP14

A New ECRIS Installation at the Argonne Tandem Linac Accelerator System

ion, ECR, ion-source, operation

106

R.H. Scott, C. Dickerson, R.C. Pardo, R.C. Vondrasek
ANL, Argonne, Illinois, USA

Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357 and used resources of ANL's ATLAS facility, an Office of Science User Facility
An existing all permanent magnet ECRIS, the BIE100 [1], will be installed at ATLAS to recover operational flexibility by providing ATLAS with a second ECR ion source for stable beams. For years ATLAS has operated with two ECR ion sources, ECR2 and the ECR charge breeder as well as a tandem electrostatic injector. The tandem was retired in 2013 and in mid-2015 the ECR charge breeder was decommissioned to make room for a new Electron Beam Ion Source exclusively for charge breeding radioactive ion beams. This left the facility with a single ECR source for virtually all stable ion beam pro-duction. Design, installation plans and anticipated opera-tional parameters are discussed.
*Dan Z. Xie, Rev. Sci. Instrum. 73, 531 (2002); http://dx.doi.org/10.1063/1.1429320

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP14

Export •

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