ECRIS2010 - List of Keywords (background)

Paper	Title	Other Keywords	Page
TUCOCK04	Mass Spectrometry with an ECR Ion Source	ion-source, ion, ECR, controls	109
	M.A.C. Hotchkis, D. Button ANSTO, Menai, Australia
	Several groups [1-3] have demonstrated the usefulness of ECR ion sources in forms of mass spectrometry, for the detection of rare long-lived radioisotopes, trace elements and stable isotope ratios. Mass spectrometry imposes strict constraints on the ion source. First, the ion source must be free of backgrounds at the same m/q ratio as isotope of interest. Backgrounds take several forms, including beams generated from residual gas or other materials in the source, either of the element of interest, or other elements which cause isobaric or other m/q ambiguities. Second, the ion source must exhibit a minimum ‘memory’ effect from sample to sample. We are interested in isotopic ratios of carbon, nitrogen and oxygen. These elements are ubiquitous in vacuum systems and so this work has its own particular challenges, especially in relation to the design and operational characteristics of the ion source. Initial work has revealed retention effects which reduce the sample clear out rates, and cause persistent backgrounds [4]. We will present results of our most recent efforts to control these problems. [1] P. Collon et al., Nucl. Instrum. Methods B 2004; 223/224: 428. [2] M. Kidera et al., Eur. J. Mass Spectrom. 2007; 13: 239. [3] M. Hotchkis et al., Rapid Comm. Mass Spec. 2008; 22: 1408-1414. [4] D. Button and M.A.C. Hotchkis, Proc. 18th ECRIS Workshop, Sept 15-18, 2008, Chicago, USA, http://www. JACoW.org/.
	Slides TUCOCK04 [3.849 MB]

WECOBK01	Commissioning of the ECRIS Charge State Breeder at TRIUMF	ion, ion-source, target, TRIUMF	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

TUCOCK04

Mass Spectrometry with an ECR Ion Source

ion-source, ion, ECR, controls

109

M.A.C. Hotchkis, D. Button
ANSTO, Menai, Australia

Several groups [1-3] have demonstrated the usefulness of ECR ion sources in forms of mass spectrometry, for the detection of rare long-lived radioisotopes, trace elements and stable isotope ratios. Mass spectrometry imposes strict constraints on the ion source. First, the ion source must be free of backgrounds at the same m/q ratio as isotope of interest. Backgrounds take several forms, including beams generated from residual gas or other materials in the source, either of the element of interest, or other elements which cause isobaric or other m/q ambiguities. Second, the ion source must exhibit a minimum ‘memory’ effect from sample to sample. We are interested in isotopic ratios of carbon, nitrogen and oxygen. These elements are ubiquitous in vacuum systems and so this work has its own particular challenges, especially in relation to the design and operational characteristics of the ion source. Initial work has revealed retention effects which reduce the sample clear out rates, and cause persistent backgrounds [4]. We will present results of our most recent efforts to control these problems.
[1] P. Collon et al., Nucl. Instrum. Methods B 2004; 223/224: 428.
[2] M. Kidera et al., Eur. J. Mass Spectrom. 2007; 13: 239.
[3] M. Hotchkis et al., Rapid Comm. Mass Spec. 2008; 22: 1408-1414.
[4] D. Button and M.A.C. Hotchkis, Proc. 18th ECRIS Workshop, Sept 15-18, 2008, Chicago, USA, http://www. JACoW.org/.

Slides TUCOCK04 [3.849 MB]

WECOBK01

Commissioning of the ECRIS Charge State Breeder at TRIUMF

ion, ion-source, target, TRIUMF

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]