The extraction of negative carbon ions from a volume cusp ion source

Melanson, Stephane; Dehnel, Morgan; Potkins, David; McDonald, Hamish; Hollinger, Craig; Theroux, J.; Martin, J.T.; Stewart, Theodor J.; Jackle, P.; Philpott, Chris; Jones, Tobin; Kalvas, Taneli; Tarvainen, O.

doi:10.1063/1.4995777

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…Beam species measurements are done with a mass spectrometer system consisting of a 90°bending magnet, two slits, and a fixed Faraday cup. The layout of the test stand is presented in Figure 2 and more details can be found in [3].…”

Section: Methodsmentioning

confidence: 99%

The extraction of both positive and negative ions from a volume cusp H⁻ ion source

Melanson,

George,

Dehnel

2024

J. Phys.: Conf. Ser.

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The TRIUMF licensed H− ion source is known to produce 15 mA of H− ions, but some applications, such as cyclotrons, require the injection of both positive and negative ions. Furthermore, when using a tandem accelerator, there would be a benefit in using an ion source that can directly extract H− and He+. A charge exchange chamber would only have to be used with the He+ beam for the production of He−. In this paper, we present the conversion of the H− ion source to allow for the extraction of both positive (He+, H+, H 2 + and H 3 + ) and negative (H− and D−) ions. In the modified design, up to 3 mA of protons and 2 mA of He+ can be extracted when using positive extraction power supplies and up to 5 mA of H− can be extracted when the polarity of the power supplies switched to negative extraction. We study how the ion source parameters affect the proton fraction and we look at the influence of the magnetic filter field in the plasma chamber.

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Section: Methodsmentioning

confidence: 99%

The extraction of both positive and negative ions from a volume cusp H⁻ ion source

Melanson,

George,

Dehnel

2024

J. Phys.: Conf. Ser.

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“…For the direct gas injection system for AMS, a Penning ion source, a filament-powered multi-cusp ion source, and an electron cyclotron resonance ion source (ECRIS) are all under development [7]- [9]. In addition, a filament-driven gaseous ion source has been proposed and developed at Dongguk University's AMS facility.…”

mentioning

confidence: 99%

Experimental Investigation of Ion Beam Extraction in Filament-Driven Negative-Carbon-Ion Sources With Various Geometrical Configurations for Accelerator Mass Spectrometry

Park

Lee

Kim

2020

IEEE Trans. Plasma Sci.

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A negative carbon-ion source was designed for accelerator mass spectrometry for application in the medical field to minimize cross-contamination and to increase the measurement efficiency. The ion source was designed by adjusting the distance between the plasma and the extraction electrodes and by changing the anode structure. Various prototype ion source configurations were fabricated to construct an ion source test stand to confirm the carbon beam extraction. The transport efficiency of the negative carbon beam was experimentally investigated using a filament-driven ion source to determine the geometrical effect of the anode configuration. The carbonion source was operated under carbon dioxide gas flowing at 3.0 sccm at a high voltage of −30.0 kV and an applied arc current of up to 0.5 A and various magnetic fields. The optimized anode structure and operating conditions of the ion source with the beam characteristics must be verified to measure the beam current with various ion source parameters. The effects of various operating and structural conditions on the beam current are evaluated in this article.

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Beam current stability improvements of negative carbon ions extraction from a multi-cusp ion source

Melanson¹,

Potkins²,

McDonald³

et al. 2018

AIP Conference Proceedings

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The extraction of negative carbon ions from a volume cusp ion source

Cited by 3 publications

References 15 publications

The extraction of both positive and negative ions from a volume cusp H⁻ ion source

The extraction of both positive and negative ions from a volume cusp H⁻ ion source

Experimental Investigation of Ion Beam Extraction in Filament-Driven Negative-Carbon-Ion Sources With Various Geometrical Configurations for Accelerator Mass Spectrometry

Beam current stability improvements of negative carbon ions extraction from a multi-cusp ion source

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The extraction of negative carbon ions from a volume cusp ion source

Cited by 3 publications

References 15 publications

The extraction of both positive and negative ions from a volume cusp H− ion source

The extraction of both positive and negative ions from a volume cusp H− ion source

Experimental Investigation of Ion Beam Extraction in Filament-Driven Negative-Carbon-Ion Sources With Various Geometrical Configurations for Accelerator Mass Spectrometry

Beam current stability improvements of negative carbon ions extraction from a multi-cusp ion source

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The extraction of both positive and negative ions from a volume cusp H⁻ ion source

The extraction of both positive and negative ions from a volume cusp H⁻ ion source