Advanced target concepts for production of radioactive ions and neutrino beams

Ravn, H. L.

doi:10.1016/s0168-583x(02)01904-3

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…The required flux of fast neutrons can be produced externally, e.g. by high-energy protoninduced spallation in a heavy metal 'converter' mounted close to the ISOL target [Rav02]. With a 100 µA proton beam at 2.2 GeV kinetic energy some 1 × 10 13 6 He atoms per second could be produced in the target.…”

Section: Production Of 6 Hementioning

confidence: 99%

The acceleration and storage of radioactive ions for a neutrino factory

Autin

Benedikt

Grieser

et al. 2003

J. Phys. G: Nucl. Part. Phys.

112

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The term beta-beam has been coined for the production of a pure beam of electron neutrinos or their antiparticles through the decay of radioactive ions circulating in a storage ring. This concept requires radioactive ions to be accelerated to a Lorentz gamma of 150 for 6 He and 60 for 18 Ne. The neutrino source itself consists of a storage ring for this energy range, with long straight sections in line with the experiment(s). Such a decay ring does not exist at CERN today, nor does a high-intensity proton source for the production of the radioactive ions. Nevertheless, the existing CERN accelerator infrastructure could be used as this would still represent an important saving for a betabeam facility. This paper outlines the first study, while some of the more speculative ideas will need further investigations.

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Section: Production Of 6 Hementioning

confidence: 99%

The acceleration and storage of radioactive ions for a neutrino factory

Autin

Benedikt

Grieser

et al. 2003

J. Phys. G: Nucl. Part. Phys.

112

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“…A major technical difficulty is the management of the heat deposited in the target material and the thermal shocks generated by the pulsed heating. To cope with the increased energy deposition, novel target designs have been proposed that allow heat removal away from the interaction area ͑see, e.g., the summary by Ravn et al 5 ͒. Solutions involving flowing liquid metals hold the potential to scale up to multi-MW input beam powers.…”

Section: Introductionmentioning

confidence: 99%

Cavitation bubble behavior inside a liquid jet

et al. 2007

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The growth and collapse of laser-induced vapor cavities inside axisymmetric free-falling liquid water jets have been studied. Bubbles of different size are generated at various distances from the jet axis and the effects on the jet interface are recorded by means of ultrafast cinematography. The configuration is characterized by two dimensionless parameters: the bubble to jet diameter ratio ␦ and the eccentricity coefficient defined as the radius of bubble generation divided by the jet radius.For high ␦ and , microjets and droplets are ejected from the liquid jet at speeds exceeding 100 m / s.The observed jet fragmentation shows similarities with experiments conducted on a liquid mercury jet hit by a pulsed proton beam, a candidate configuration for future accelerator based facilities.

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“…Simulations using the MARS code interfaced with MCNP libraries are used to try and understand the neutron flux produced from different converters in an attempt to optimize both the geometry and converter material for a proposed cylindrical target design [11,12].…”

Section: Introductionmentioning

confidence: 99%

Radioactive ion beams produced by neutron-induced fission at ISOLDE

Catherall

Lettry

Gilardoni

et al. 2003

Nuclear Instruments and Methods in Physics Research Section B:

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The production rates of neutron-rich fission products for the next-generation radioactive beam facility EURISOL are mainly limited by the maximum amount of power deposited by protons in the target. An alternative approach is to use neutron beams to induce fission in actinide targets. This has the advantage of reducing: the energy deposited by the proton beam in the target; contamination from neutron-deficient isobars that would be produced by spallation; and mechanical stress on the target. At ISOLDE CERN, tests have been made on standard ISOLDE actinide targets using fast neutron bunches produced by bombarding thick, high-Z metal converters with 1 and 1.4 GeV proton pulses. This paper reviews the first applications of converters used at ISOLDE. It highlights the different geometries and the techniques used to compare fission yields produced by the proton beam directly on the target with neutron-induced fission. Results from the six targets already tested, namely UC 2 /graphite and ThO 2 targets with tungsten and tantalum converters, are presented.To gain further knowledge for the design of a dedicated target as required by the TARGISOL project, the results are compared to simulations, using the MARS code interfaced with MCNP libraries, of the neutron flux from the converters interacting with the actinide targets. Victoria, B.C. Canada, 6-10 May, 2002 Geneva R. Catherall ** , J. Lettry, S. Gilardoni, U. Köster and the ISOLDE collaboration Paper presented at the 14th International Conference on Electromagnetic Isotope Separators and Techniques Related to their Application CERN, CH-1211 Genève 23, Switzerland AbstractThe production rates of neutron-rich fission products for the next-generation radioactive beam facility EURISOL [1] are mainly limited by the maximum amount of power deposited by protons in the target. An alternative approach is to use neutron beams to induce fission in actinide targets. This has the advantage of reducing: the energy deposited by the proton beam in the target; contamination from neutron-deficient isobars that would be produced by spallation; and mechanical stress on the target. At ISOLDE CERN [2], tests have been made on standard ISOLDE actinide targets using fast neutron bunches produced by bombarding thick, high-Z metal converters with 1 and 1.4 GeV proton pulses.This paper reviews the first applications of converters used at ISOLDE. It highlights the different geometries and the techniques used to compare fission yields produced by the proton beam directly on the target with neutron-induced fission. Results from the six targets already tested, namely UC 2 /graphite and ThO 2 targets with tungsten and tantalum converters, are presented.To gain further knowledge for the design of a dedicated target as required by the TARGISOL project [3], the results are compared to simulations, using the MARS [4][5][6][7] code interfaced with MCNP [8,9] libraries, of the neutron flux from the converters interacting with the actinide targets.

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Advanced target concepts for production of radioactive ions and neutrino beams

Cited by 8 publications

References 15 publications

The acceleration and storage of radioactive ions for a neutrino factory

The acceleration and storage of radioactive ions for a neutrino factory

Cavitation bubble behavior inside a liquid jet

Radioactive ion beams produced by neutron-induced fission at ISOLDE

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