ECRIS2010 - List of Keywords (target)

Paper	Title	Other Keywords	Page
MOPOT006	Ionization Efficiency of a COMIC Ion Source Equipped With a Quartz Plasma Chamber	ion, plasma, ion-source, injection	51
	P. Suominen, T. Stora CERN, Geneva, Switzerland J. Médard, P. Sortais LPSC, Grenoble, France
	The ISOLDE facility at CERN produces a wide range of radioactive ion beams due to a long history on target and ion source development. Because the radioactive isotope production is very limited, the most important ion source parameters are high ionization efficiency, selectivity and reliable operation under intense radiation. Currently used ion sources (mainly laser (RILIS [1]) and arc discharge -type ion sources (VADIS [2]) do not efficiently ionize light noble gases, such as helium, and molecules, such as CO, N₂ and NO. These beams were previously planned to be produced with 1+ ECR ion sources operating at 2.45 GHz (for example MINIMONO [3]) but due to new and more efficient RF coupling of COMIC-type ion sources [4], we expect to advance in 2.45 GHz ECRIS utilization for radioactive beam production. The new COMIC source designed by LPSC, Grenoble incorporates special features such as a plasma chamber fully made of quartz (Q-COMIC). This should provide chemically good conditions for molecular ion beam production, especially for carbon. This paper presents the first ionization efficiency measurements of the Q-COMIC. [1] V.N. Fedosseev, et al, Nucl. Instrum. Methods Phys. Res. B 266/19-20 (2008) 4378. [2] PhD thesis, univ. polyt. Bucarest, L. Penescu (2009). [3] F. Wenander, W. Farabolini, G. Gaubert, P. Jardin, J. Lettry, Nucl. Phys. A, 746 (2004) 659. [4] P. Sortais, T. Lamy, J. Médard, J. Angot, L. Latrasse, and T. Thuillier, Rev. Sci. Instrum. 81 (2010) 02B314.
	Poster MOPOT006 [0.697 MB]

MOPOT013	MONOBOB II : Latest Results of Monocharged Ion Source for SPIRAL2 Project	ion, ECRIS, plasma, vacuum	64
	M. Dubois, O. Bajeat, C. Barue, C. Canet, M. Dupuis, J.L. Flambard, R. Frigot, P. Jardin, C. Leboucher, N. Lecesne, P. Lecomte, P. Lehérissier, F. Lemagnen, L. Maunoury, O. Osmond, J.Y. Pacquet, A. Pichard GANIL, Caen, France
	MONOBOB II is an electron cyclotron resonance ion source (ECRIS) based on a cylindrical symmetry magnetic structure [1]. It has been designed for the SPIRAL2 project in order to ionize radioactive gases coming from the production targets of the Target Ion Source System (TISS). The goal is to build a long-lived ECRIS with the aim of running three months in the hostile environment of the production target while keeping high ionization efficiencies. The Target Ion Source System has been tested using noble gases (He, Ne, Ar, Kr and Xe), with and without target in order to observe the behavior of the source coupled to the target. Currently, the target is made of ~1000 carbon slices, having the same geometry as the final UCx target. So far, its temperature has been limited to 1500°C. Ionization efficiencies and response times of the TISS have been measured versus gases and target temperature [2]. Results should lead to determine the maximum radioactive ion production which can be reasonably expected with the final TISS. The status of this development will be presented.
	Poster MOPOT013 [0.858 MB]

MOPOT016	A Low Power Survey of Radial-Offset Axial Sputtering and High Intensity Uranium Production from Axial Sputtering in SuSI	plasma, injection, survey, ion	69
	D.G. Cole, G. Machicoane, T. Ropponen, L.T. Sun, L. Tobos NSCL, East Lansing, Michigan, USA
	Prototype sputtering hardware has been tested in the SuSI ion source and early uranium ion production is discussed. Also, results of a low power survey of axial sputtering, to test sputtering efficiency at incremental radial offsets from on axis position, is reported.
	Poster MOPOT016 [2.672 MB]

TUCOAK04	Production of Highly Charged U Ion Beam from RIKEN SC-ECRIS	ion, emittance, ECRIS, extraction	84
	Y. Higurashi, M. Fujimaki, A. Goto, H. Haba, E. Ikezawa, O. Kamigaito, M. Kase, M. Komiyama, T. Nakagawa, J. Ohnishi, Y. Watanabe RIKEN Nishina Center, Wako, Japan T. Aihara, M. Tamura, A. Uchiyama SHI Accelerator Service Ltd., Tokyo, Japan
	In 2008, we successfully produced 345 MeV/u U beam (~0.4 pnA on target) for RIKEN RIBF project. However, to meet the requirement of the RIBF (primary beam intensity of 1pμA on target), we still need to increase the beam intensity. To increase the beam intensity of U ion, we started to make a test experiments for production of U ion beam from the new SC-ECRIS. In this experiment, we produced 2~1.5 pμA of medium charge state U ion (ex., 55 eμA of U³¹⁺, 57 eμA of U²⁷⁺) at the RF power of 1.2 kW with sputtering method. For testing the effect of the ionized gas on the U ion beam, we chose Ar, Ar + O₂ and O₂ gas for producing U ion beam. In this experiment, we observed that the beam intensity of lower charge state of U ion beam (<33+) was increased and the emittance of the U ion beam was decreased from ~0.1 π.mm mrad (1rms) to 0.05 π.mm mrad with adding Ar gas to O₂ gas. Using this method, we supplied U³⁵⁺ beam for ~1 month without break for the RIBF experiment. In this contribution, we present the experimental results for production of U ion beam from SC-ECRIS in detail and future plan to increase the U ion beam intensity.
	Slides TUCOAK04 [1.709 MB]

WECOBK01	Commissioning of the ECRIS Charge State Breeder at TRIUMF	ion, ion-source, TRIUMF, background	178
	F. Ames, R.A. Baartman, P.G. Bricault, K. Jayamanna TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada T. Lamy LPSC, Grenoble, France
	Radioactive isotopes produced at the ISOL facility ISAC at TRIUMF are usually extracted from the target ion source system as singly charged ions. If the mass of those ions exceeds A=30 their acceleration requires the breeding to highly charged ions. A modified version of an ECRIS charge breeder (14.5 GHz PHOENIX from Pantechnik) has been installed and a first on-line test resulting in the successful acceleration of ⁸⁰Rb¹⁴⁺ has been performed already in 2008. During the radioactive beam time periods of 2009 and 2010 further measurements with stable and radioactive ions from different target ion source combinations have been performed to fully commission the system. Breeding efficiencies of several percent in the maximum of the charge state distribution have been achieved. Detailed results will be presented.
	Slides WECOBK01 [1.230 MB]

Paper

Title

Other Keywords

Page

MOPOT006

Ionization Efficiency of a COMIC Ion Source Equipped With a Quartz Plasma Chamber

ion, plasma, ion-source, injection

51

P. Suominen, T. Stora
CERN, Geneva, Switzerland
J. Médard, P. Sortais
LPSC, Grenoble, France

The ISOLDE facility at CERN produces a wide range of radioactive ion beams due to a long history on target and ion source development. Because the radioactive isotope production is very limited, the most important ion source parameters are high ionization efficiency, selectivity and reliable operation under intense radiation. Currently used ion sources (mainly laser (RILIS [1]) and arc discharge -type ion sources (VADIS [2]) do not efficiently ionize light noble gases, such as helium, and molecules, such as CO, N₂ and NO. These beams were previously planned to be produced with 1+ ECR ion sources operating at 2.45 GHz (for example MINIMONO [3]) but due to new and more efficient RF coupling of COMIC-type ion sources [4], we expect to advance in 2.45 GHz ECRIS utilization for radioactive beam production. The new COMIC source designed by LPSC, Grenoble incorporates special features such as a plasma chamber fully made of quartz (Q-COMIC). This should provide chemically good conditions for molecular ion beam production, especially for carbon. This paper presents the first ionization efficiency measurements of the Q-COMIC.
[1] V.N. Fedosseev, et al, Nucl. Instrum. Methods Phys. Res. B 266/19-20 (2008) 4378.
[2] PhD thesis, univ. polyt. Bucarest, L. Penescu (2009).
[3] F. Wenander, W. Farabolini, G. Gaubert, P. Jardin, J. Lettry, Nucl. Phys. A, 746 (2004) 659.
[4] P. Sortais, T. Lamy, J. Médard, J. Angot, L. Latrasse, and T. Thuillier, Rev. Sci. Instrum. 81 (2010) 02B314.

Poster MOPOT006 [0.697 MB]

MOPOT013

MONOBOB II : Latest Results of Monocharged Ion Source for SPIRAL2 Project

ion, ECRIS, plasma, vacuum

64

M. Dubois, O. Bajeat, C. Barue, C. Canet, M. Dupuis, J.L. Flambard, R. Frigot, P. Jardin, C. Leboucher, N. Lecesne, P. Lecomte, P. Lehérissier, F. Lemagnen, L. Maunoury, O. Osmond, J.Y. Pacquet, A. Pichard
GANIL, Caen, France

MONOBOB II is an electron cyclotron resonance ion source (ECRIS) based on a cylindrical symmetry magnetic structure [1]. It has been designed for the SPIRAL2 project in order to ionize radioactive gases coming from the production targets of the Target Ion Source System (TISS). The goal is to build a long-lived ECRIS with the aim of running three months in the hostile environment of the production target while keeping high ionization efficiencies. The Target Ion Source System has been tested using noble gases (He, Ne, Ar, Kr and Xe), with and without target in order to observe the behavior of the source coupled to the target. Currently, the target is made of ~1000 carbon slices, having the same geometry as the final UCx target. So far, its temperature has been limited to 1500°C. Ionization efficiencies and response times of the TISS have been measured versus gases and target temperature [2]. Results should lead to determine the maximum radioactive ion production which can be reasonably expected with the final TISS. The status of this development will be presented.

Poster MOPOT013 [0.858 MB]

MOPOT016

A Low Power Survey of Radial-Offset Axial Sputtering and High Intensity Uranium Production from Axial Sputtering in SuSI

plasma, injection, survey, ion

69

D.G. Cole, G. Machicoane, T. Ropponen, L.T. Sun, L. Tobos
NSCL, East Lansing, Michigan, USA

Prototype sputtering hardware has been tested in the SuSI ion source and early uranium ion production is discussed. Also, results of a low power survey of axial sputtering, to test sputtering efficiency at incremental radial offsets from on axis position, is reported.

Poster MOPOT016 [2.672 MB]

TUCOAK04

Production of Highly Charged U Ion Beam from RIKEN SC-ECRIS

ion, emittance, ECRIS, extraction

84

Y. Higurashi, M. Fujimaki, A. Goto, H. Haba, E. Ikezawa, O. Kamigaito, M. Kase, M. Komiyama, T. Nakagawa, J. Ohnishi, Y. Watanabe
RIKEN Nishina Center, Wako, Japan
T. Aihara, M. Tamura, A. Uchiyama
SHI Accelerator Service Ltd., Tokyo, Japan

In 2008, we successfully produced 345 MeV/u U beam (~0.4 pnA on target) for RIKEN RIBF project. However, to meet the requirement of the RIBF (primary beam intensity of 1pμA on target), we still need to increase the beam intensity. To increase the beam intensity of U ion, we started to make a test experiments for production of U ion beam from the new SC-ECRIS. In this experiment, we produced 2~1.5 pμA of medium charge state U ion (ex., 55 eμA of U³¹⁺, 57 eμA of U²⁷⁺) at the RF power of 1.2 kW with sputtering method. For testing the effect of the ionized gas on the U ion beam, we chose Ar, Ar + O₂ and O₂ gas for producing U ion beam. In this experiment, we observed that the beam intensity of lower charge state of U ion beam (<33+) was increased and the emittance of the U ion beam was decreased from ~0.1 π.mm mrad (1rms) to 0.05 π.mm mrad with adding Ar gas to O₂ gas. Using this method, we supplied U³⁵⁺ beam for ~1 month without break for the RIBF experiment. In this contribution, we present the experimental results for production of U ion beam from SC-ECRIS in detail and future plan to increase the U ion beam intensity.

Slides TUCOAK04 [1.709 MB]

WECOBK01

Commissioning of the ECRIS Charge State Breeder at TRIUMF

ion, ion-source, TRIUMF, background

178

F. Ames, R.A. Baartman, P.G. Bricault, K. Jayamanna
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
T. Lamy
LPSC, Grenoble, France

Radioactive isotopes produced at the ISOL facility ISAC at TRIUMF are usually extracted from the target ion source system as singly charged ions. If the mass of those ions exceeds A=30 their acceleration requires the breeding to highly charged ions. A modified version of an ECRIS charge breeder (14.5 GHz PHOENIX from Pantechnik) has been installed and a first on-line test resulting in the successful acceleration of ⁸⁰Rb¹⁴⁺ has been performed already in 2008. During the radioactive beam time periods of 2009 and 2010 further measurements with stable and radioactive ions from different target ion source combinations have been performed to fully commission the system. Breeding efficiencies of several percent in the maximum of the charge state distribution have been achieved. Detailed results will be presented.

Slides WECOBK01 [1.230 MB]