A new concept kinetic-ejection negative-ion source for rib generation

Alton, G.D.; Liu, Y; Williams, C. L.; Murray, S. N.

doi:10.1016/s0168-583x(00)00238-x

Cited by 16 publications

(10 citation statements)

References 7 publications

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“…for negative ion formation is found to be an effective means for simultaneously dissociating molecular carriers and efficiently ionizing highly electronegative atomic constituents present in the molecule. A unique Cs-sputter negative-ion source was conceived [54,55] at HRIBF that could solve the molecular sideband problem for 17,18 F beams. Details of these sputter-type ion sources are reported in section 4.…”

Section: Sputter Generation Of Negative Ionsmentioning

confidence: 99%

“…In these cases, additional isobar suppression methods or steps were necessary. Considerable effort was put forth to investigate potential negative-ion sources based on different ionization methods, including surface ionization [37,60,61], plasma-sputtering [62], Cs-sputtering [54,63], and electron-beam plasma [64]. Three negative-ion sources that have been successfully used online for RIB production are described in the next section.…”

Section: Production Of Negative Ribs At Hribfmentioning

confidence: 99%

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Production of negatively charged radioactive ion beams

2017

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Beams of short-lived radioactive nuclei are needed for frontier experimental research in nuclear structure, reactions, and astrophysics. Negatively charged radioactive ion beams have unique advantages and allow for the use of a tandem accelerator for post-acceleration, which can provide the highest beam quality and continuously variable energies. Negative ion beams can be obtained with high intensity and some unique beam purification techniques based on differences in electronegativity and chemical reactivity can be used to provide beams with high purity. This article describes the production of negative radioactive ion beams at the former holifield radioactive ion beam facility at Oak Ridge National Laboratory and at the CERN ISOLDE facility with emphasis on the development of the negative ion sources employed at these two facilities.

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Section: Sputter Generation Of Negative Ionsmentioning

confidence: 99%

Section: Production Of Negative Ribs At Hribfmentioning

confidence: 99%

Production of negatively charged radioactive ion beams

2017

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“…[1][2][3][4] At present, to supplement the existing production source for RIBs, Injector for Radioactive Ion Species 1 ͑IRIS1͒, a new production source ͓Injector for Radioactive Ion Species 2 ͑IRIS2͔͒ ͑Ref. [1][2][3][4] At present, to supplement the existing production source for RIBs, Injector for Radioactive Ion Species 1 ͑IRIS1͒, a new production source ͓Injector for Radioactive Ion Species 2 ͑IRIS2͔͒ ͑Ref.…”

Section: Introductionmentioning

confidence: 99%

Extraction simulations and emittance measurements of a Holifield Radioactive Ion Beam Facility electron beam plasma source for radioactive ion beams

Mendez

Liu

2010

Review of Scientific Instruments

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The Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory has a variety of ion sources used to produce radioactive ion beams (RIBs). Of these, the workhorse is an electron beam plasma (EBP) ion source. The recent addition of a second RIB injector, the Injector for Radioactive Ion Species 2 (IRIS2), for the HRIBF tandem accelerator prompted new studies of the optics of the beam extraction from the EBP source. The source was modeled using SIMION V8.0, and results will be presented, including comparison of the emittances as predicted by simulation and as measured at the HRIBF offline ion source test facilities. Also presented will be the impact on phase space shape resulting from extraction optics modifications implemented at IRIS2.

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“…Also such carriers typically have low electron affinities and cannot be ionized in traditional negative surface ionization sources. The kinetic-ejection source was conceived [15] to overcome these handicaps, encountered while attempting to generate useable intensifies of 17,18 F for important nuclear astrophysics [16][17][18][19] and nuclear-structure physics experiments [20]. The source efficiently ionizes atoms or molecules with intermediate to high electron affinities.…”

Section: The Kinetic-ejection Negative-ion Sourcementioning

confidence: 99%

“…Highly permeable, thin fibrous A1 2 0 3 , ZrO 2 , HfO 2 targets, in combination with the KENIS [15] have enabled research with full stripped beams of 17,18 F 9+ at intensities up to 3 × 10 6 ions/s. The source has performed remarkably well as evidenced by its 1500 hours of on-line use for nuclear astrophysics experiments without failure.…”

Section: Beams Delivered For Researchmentioning

confidence: 99%

High-efficiency target-ion sources for RIB generation

Alton¹

Proceedings of International Conference on Particle Accelerators

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In this report, emphasis is placed on issues related to selection and design of high-temperature, ion sources that have demonstrated the high ionization efficiency, species versatility, and operational reliability required at ISOL based radioactive ion beam facilities. In designing sources for ISOL applications, careful attention must be given to the following: selecting the most appropriate materials of construction, coupling of the vapor transport system, ion optics, operational parameters, thermal transport properties, emittances, ionization efficiencies and engineering details for safe handling in the high-level radioactivity radiation fields incumbent at such facilities. Included in the article are descriptions and performance data for high temperature, positive (electron-impact and surface-ionization) and negative (kinetic-ejection and surface-ionization) ion sources, as well as, low temperature, batch-mode negative-ion sources, developed for processing long-lived isotopes, that have been principal contributors to recent successes held at the Holifield Radioactive Ion Beam Facility.

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A new concept kinetic-ejection negative-ion source for rib generation

Cited by 16 publications

References 7 publications

Production of negatively charged radioactive ion beams

Production of negatively charged radioactive ion beams

Extraction simulations and emittance measurements of a Holifield Radioactive Ion Beam Facility electron beam plasma source for radioactive ion beams

High-efficiency target-ion sources for RIB generation

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