Calculations and first results obtained with a SiC prototype of the SPES direct target

Barbui, M.; Andrighetto, A.; Antonucci, C.; Biasetto, Lisa; Carturan, S.; Cervellera, F.; Cevolani, S.; Cinausero, M.; Colombo, Paolo; Dainelli, A.; Bernardo, Plinio Dí; Giacchini, M.; Gramegna, F.; Lollo, M.; Maggioni, G.; Manzolaro, M.; Meneghetti, Giovanni; Petrovich, C.; Piga, L.; Prete, G.; Re, M.; Rizzi, V.; Stracener, D. W.; Tonezzer, M.; Zafiropoulos, D.; Zanonato, Pier Luigi

doi:10.1016/j.nimb.2008.05.049

Cited by 18 publications

(7 citation statements)

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“…The total in-target fission rate was calculated to be ∼1.5 × 10 13 particles/sec using the code mcnpx. The release rate of 132 Sn at the exit of the transfer line was deduced, using the ORNL model [13], to be ∼2 × 10 9 particles/sec which is comparable to the value of ∼10 9 particles/sec for SPES [3].…”

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confidence: 59%

“…The 10 kW-ISOL target consists of two graphite windows at a front of the target, 19 UC x disks of 1.3 mm thickness (ρ = 2.5 g/cm 3 , φ = 50 mm), a graphite container, a Ta-heater (φ outer = 60.0 mm, thickness = 0.2 mm), graphite beam dumps located at an end of target, and a transfer line to transport the isotopes to an ionizer (hot-cavity). The design of the 10 kW-ISOL target of RISP is a scale-up version of that of SPES [1][2][3][4][5][6]. The rare isotopes are produced in the target grains by a 70 MeV proton beam incident on the uranium carbide (UC x ) target via the proton-induced fission.…”

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confidence: 99%

“…Fig. 4(b) represents the calculated release efficiency at the exit of the transfer line as a function of the half live of 132 Sn, comparing with that of SPES [3]. The black-square and red-circle lines correspond to the results of the calculated release efficiencies for RISP and SPES, respectively.…”

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confidence: 99%

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Design study of 10 kW direct fission target for RISP project

Tshoo

Jang

Kang

et al. 2014

EPJ Web of Conferences

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Abstract. We are developing Isotope Separation On-Line (ISOL) target system, which consists of 1.3 mm-thick uranium-carbide multi-disks and cylindrical tantalum heater, to be installed in new facility for Rare Isotope Science Project in Korea. The intense neutron-rich nuclei are produced via the fission process using the uranium carbide targets with a 70 MeV proton beam. The fission rate was estimated to be ∼1.5 × 10 13 /sec for 10 kW proton beam. The target system has been designed to be operated at a temperature of ∼2000 • C so as to improve the release efficiency.Production and delivery of high purity intense of Rare Isotope Beam (RIB) have been a major concern for fundamental research fields such as astro− and nuclear−physics as well as applied research field such as material and bio-medical science. Rare Isotope Science Project (RISP) of Korea has proposed to construct Isotope Separation On-Line (ISOL) facility in order to provide the intense rare isotopes. The ISOL target enables us not only to produce the nuclei with the medium mass neutronrich region but also to obtain their high production rates. A uniform 70 MeV proton beam with a maximum current of 500 µA, which is delivered from a cyclotron driver, will impinge on an uranium carbide target. The neutron-rich isotopes are produced via proton-induced fission. A singly charged (1+) RIB is produced and extracted from the target and the ion source, respectively, then the beam emittance is reduced by a RF-cooler to be 3 πmm mrad before injecting to the high resolution mass separator (HRMS). The isotopes selected by the HRMS are delivered to an electron beam ion source (EBIS) or an electron cyclotron resonance (ECR) type charge breeder so as to breed the charge from the 1 + charge state to a n + charge state for efficient and economical post-acceleration. An A/q separator is installed at the downstream of the charge breeder to purify the ion beam contaminated during charge breeding. Here, we report on the results of the ISOL target design for 10 kW proton beam.The main issues concerning the design of the ISOL target can be divided into three categories; intarget fission rate, release time, and temperature of the target. Firstly, a total effective thickness of the target should be as thick as possible in order to maximize the in-target fission rate. This requires a large size of the target. Secondly, release time should be as short as possible so as to minimize the losses by the decay of isotopes. A small size of the target helps to reduce the release time by decreasing the flight length of the isotopes. However, it should be noted here that the small size can lead to melt down of the target due to the reduced radiant cooling. Lastly, the temperature of the target should be as high as possible to increase the thermal velocity of the isotopes, which leads to the reduction of the release time. Therefore, the correlations between the three points mentioned above should be investigated so as to find the optimum condition for the ISOL target. a

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Design study of 10 kW direct fission target for RISP project

Tshoo

Jang

Kang

et al. 2014

EPJ Web of Conferences

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“…Silicon carbide will be among the first irradiated materials at SPES, in order to produce p-rich aluminum isotopes. A SPES target prototype composed of seven thin SiC discs has been already tested at OLTF, proving the possibility to obtain 26 Al from it [6].…”

Section: Other Materialsmentioning

confidence: 99%

Research and development on materials for the SPES target

Corradetti

Andrighetto

Manzolaro

et al. 2014

EPJ Web of Conferences

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Abstract.The SPES project at INFN-LNL (Istituto Nazionale di Fisica Nucleare -Laboratori Nazionali di Legnaro) is focused on the production of radioactive ion beams. The core of the SPES facility is constituted by the target, which will be irradiated with a 40 MeV, 200 µA proton beam in order to produce radioactive species. In order to efficiently produce and release isotopes, the material constituting the target should be able to work under extreme conditions (high vacuum and temperatures up to 2000 • C). Both neutronrich and proton-rich isotopes will be produced; in the first case, carbon dispersed uranium carbide (UC x ) will be used as a target, whereas to produce p-rich isotopes, several types of targets will have to be irradiated. The synthesis and characterization of different types of material will be reported. Moreover, the results of irradiation and isotopes release tests on different uranium carbide target prototypes will be discussed.

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“…Impinging SiC target with protons, one of the elements coming out from nuclear reaction is aluminum with its isotopes. 3 Isobaric contamination of produced aluminum could be due to surface ionized elements, i.e., magnesium and sodium. In order to provide an aluminum ion beam, among various types of ionization techniques, the main effectiveness is expected with laser photoionization.…”

Section: Introductionmentioning

confidence: 99%

Photo-ionization of aluminum in a hot cavity for the selective production of exotic species project

Scarpa

Makhathini

Tomaselli

et al. 2013

Review of Scientific Instruments

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SPES (Selective Production of Exotic Species) is an Isotope Separation On-Line (ISOL) based accelerator facility that will be built in the Legnaro-Istituto Nazionale di Fisica Nucleare (INFN) Laboratory (Italy), intended to provide intense neutron-rich radioactive ion beams obtained by proton-induced fission of a uranium carbide (UCx) target. Besides this main target material, silicon carbide (SiC) will be the first to be used to deliver p-rich beams. This target will also validate the functionality of the SPES facility with aluminum beam as result of impinging SiC target with proton beam. In the past, off line studies on laser photoionization of aluminum have been performed in Pavia Spectroscopy Laboratory and in Laboratori Nazionali di Legnaro; a XeCl excimer laser was installed in order to test the laser ionization in the SPES hot cavity. With the new Wien filter installed a better characterization of the ionization process in terms of efficiency was performed and results are discussed.

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Calculations and first results obtained with a SiC prototype of the SPES direct target

Cited by 18 publications

References 2 publications

Design study of 10 kW direct fission target for RISP project

Design study of 10 kW direct fission target for RISP project

Research and development on materials for the SPES target

Photo-ionization of aluminum in a hot cavity for the selective production of exotic species project

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