Thermo-mechanical behaviour of a single slice test device for the FRIB high power target

Pellemoine, Frédérique; Mittig, W.; Avilov, M.; Ippel, D.; Lenz, Jonathan D.; Oliva, John C.; Silverman, I.; Youchison, D.L.; Xu, Ting

doi:10.1016/j.nima.2011.06.010

Cited by 14 publications

(12 citation statements)

References 6 publications

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“…Each material has advantages and requires specific technologies to form a robust target. Graphite has a high operating temperature and is implemented as a rotating target, using IR radiation for cooling [19,20,21]. Beryllium can be used as a static target with or without beam rasterring [22,23,24], or in a rotating configuration [25].…”

Section: Windowless Jet Liquid Lithium Targetmentioning

confidence: 99%

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

Mardor¹,

Aviv²,

Avrigeanu³

et al. 2018

Eur. Phys. J. A

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The Soreq Applied Research Accelerator Facility (SARAF) is under construction in the Soreq Nuclear Research Center at Yavne, Israel. When completed at the beginning of the next decade, SARAF will be a user facility for basic and applied nuclear physics, based on a 40 MeV, 5 mA CW proton/deuteron superconducting linear accelerator. Phase I of SARAF (SARAF-I, 4 MeV, 2mA CW protons, 5 MeV 1mA CW deuterons) is already in operation, generating scientific results in several fields of interest. The main ongoing program at SARAF-I is the production of 30 keV neutrons and measurement of Maxwellian Averaged Cross Sections (MACS), important for the astrophysical s-process. The world leading Maxwellian epithermal neutron yield at SARAF-I (5×10 10 epithermal neutrons/sec), generated by a novel Liquid-Lithium Target (LiLiT), enables improved precision of known MACSs, and new measurements of lowabundance and radioactive isotopes. Research plans for SARAF-II span several disciplines: Precision studies of beyond-Standard-Model effects by trapping light exotic radioisotopes, such as 6 He, 8 Li and 18,19,23 Ne, in unprecedented amounts (including meaningful studies already at SARAF-I); extended nuclear astrophysics research with higher energy neutrons, including generation and studies of exotic neutron-rich isotopes relevant to the rapid (r-) process; nuclear structure of exotic isotopes; high energy neutron cross sections for basic nuclear physics and material science research, including neutron induced radiation damage; neutron based imaging and therapy; and novel radiopharmaceuticals development and production.

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Section: Windowless Jet Liquid Lithium Targetmentioning

confidence: 99%

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

Mardor¹,

Aviv²,

Avrigeanu³

et al. 2018

Eur. Phys. J. A

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“…Detailed radiation transport calculations were performed to assess the dose levels in the FF seals considered in both the production target and the beam dump systems. For both the FRIB baseline and its energy upgrade option, the worst case scenario is represented by an oxygen beam of 400 kW power and energy of 266 MeV/u and 637 MeV/u respectively impinging on the production target and the beam dump [2]. The generated secondary beams will irradiate the components around the target and dump systems including the FF seals.…”

Section: Calculation Of Radiation Dose Level In the Ferrofluidic Seal For Fribmentioning

confidence: 99%

“…Ferrofluidic feedthrough (FF) seals capable of providing transmission of rotary motion through a vacuum boundary with essentially zero leakage at high speed and with low friction torque have been under consideration for use in the future projectile fragment separator of the Facility for Rare Isotope Beams (FRIB) [1][2]. The potential use of such feedthroughs was explored during the early stages of the project where they were to be integrated with the rare isotope production target [2] and the beam dump systems.…”

Section: Introductionmentioning

confidence: 99%

“…Proton flux 1.2x108 p/cm 2 /s and proton peak fluence 1.14x1014 p/cm 2 Neutron flux 8.6x10 10 n/cm 2 /s and peak neutron fluence 8.2x1016 neutrons/cm 2  γ flux 1.31x10 11 γ/cm 2 /s with peak γ fluence 1.24x10 17 γ /cm 2 Electron flux 2.85x10 e/cm /s and electron fluence 2.7x10 15 e/cm 2 These values, compared to experimental studies on listed in literature are typically about an order of magnitude higher except for electron-induced demagnetization reported[19] where a maximum fluence of ~2 10 15 electrons was used to study demagnetization of Nd 2 Fe 14 B magnets.At the ferrofluid location the flux and fluence of the irradiating species (neutrons, γ and electrons) corresponding to the maximum dose of 20 MGy are estimated to be of the order:  Neutron flux 1.98x10 10 n/cm 2 /s and peak neutron fluence 1.88x1016 neutrons/cm 2  γ flux 2.57x10 10 γ/cm 2 /s with peak γ fluence 2.44x10 16 γ/cm 2 Electron flux 3.81x10 8 e/cm 2 /s and electron fluence 3.62x10 14 e/cm2 …”

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confidence: 99%

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Performance degradation of ferrofluidic feedthroughs in a mixed irradiation field

Simos

Fernandes

Mittig

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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Ferrofluidic feedthrough (FF) rotary seals containing either NdFeB or SmCo-type permanent magnets have been considered for use in the target and beam dump systems of the Facility for Rare Isotope Beams (FRIB). To evaluate their performance under irradiation three FF seals were irradiated in a mixed field consisting of fast neutrons, protons and γ-rays to an average absorbed dose of 0.2, 2.0, and 20.0 MGy at the Brookhaven Linac Isotope Producer facility (BLIP). The radiation types and energy profiles mimic those expected at the FRIB facility. Degradation of the operational performance of these devices due to irradiation is expected to be the result of the de-magnetization of the permanent magnets contained within the seal and the changes in the ferrofluid properties. Post-irradiation performance was evaluated by determining the ferrofluidic seal vacuum tightness and torque under static and dynamic conditions. The study revealed that the ferrofluidic feedthrough seal irradiated to a dose of 0.2 MGy maintained its vacuum tightness under both static and rotational condition while the one irradiated to a dose of 2.0 MGy exhibited signs of ferrofluid damage but no overall performance loss. At 20 MGy dose the effects of irradiation on the ferrofluid properties (viscosity and particle agglomeration) were shown to be severe. Furthermore, limited de-magnetization of the annular shaped Nd 2 Fe 14 B and Sm 2 Co 27 magnets located within the irradiated FFs was observed for doses of 0.2 MGy and 20 MGy respectively.

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“…In the near term (i.e. within five years), parallel prototyping activities for SPIRAL2 [11] at GANIL (France) and for the FRIB [12] at MSU (USA) will prospectively provide targets capable of handling 200kW of deposited beam power. These programs would be of direct relevance to the FAFNIR target design.…”

Section: Fafnir Targetmentioning

confidence: 99%

FAFNIR: Strategy and risk reduction in accelerator driven neutron sources for fusion materials irradiation data

Surrey¹,

Porton²,

Fernández-Caballero³

et al. 2014

Fusion Engineering and Design

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Abstract-The need to populate the fusion materials engineering data base has long been recognized, the IFMIF facility being the present proposed neutron source for this purpose. Re-evaluation of the regulatory approach for the EU proposed DEMO device shows that the specification of the neutron source can be reduced with respect to IFMIF, allowing lower risk technology solutions to be considered. The justification for this approach is presented and a description of a proposed facility, FAFNIR, is presented with more detailed discussion of the accelerator and target designs.

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Thermo-mechanical behaviour of a single slice test device for the FRIB high power target

Cited by 14 publications

References 6 publications

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

The Soreq Applied Research Accelerator Facility (SARAF): Overview, research programs and future plans

Performance degradation of ferrofluidic feedthroughs in a mixed irradiation field

FAFNIR: Strategy and risk reduction in accelerator driven neutron sources for fusion materials irradiation data

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