The TSL neutron beam facility

Prokofiev, Alexander V.; Blomgren, J.; Bystrom, O.; Ekström, C.; Pomp, Stephan; Tippawan, U.; Ziemann, Volker; Österlund, Michael

doi:10.1093/rpd/ncm006

Cited by 56 publications

(38 citation statements)

References 17 publications

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“…We have measured light-ions (p, d, t, 3 He and α) production in the interaction of 175 MeV neutrons with iron and bismuth at TSL. We presented first preliminary cross sections for protons, deuterons and tritons and we compared them with model calculations by TALYS-1.0 code.…”

Section: Resultsmentioning

confidence: 99%

“…At the TSL neutron beam facility, a cyclotron is producing a monoenergetic proton beam that impinge on an enriched 7 Li target, where neutrons are produced by the 7 Li(p,n) 7 Be reaction [3]. In the present experiment the proton energy was 179.3 (±0.8) MeV and the used 7 Li target was 23.5 mm thick, thus producing a quasi-monoenergetic neutron EPJ Web of Conferences beam with average energy of the high-energy peak of 175.0 (±2.5) MeV The proton beam intensity varied between 150 nA to 400 nA, due to operational needs of the cyclotron.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Events in the ∆E-E bands are fitted with respect to the energy deposition in the Si1 and in the Si2, which is determined from the thickness of each detector and the respective energy losses. Calculation with the SRIM code (version 2008.04) [11] provided the energy losses of protons, deuterons, tritons, 3 He and α particles in each silicon detector. Since linear response is expected in silicon detectors in the present range of energies, punch through energy of each particle in Si1 and in Si2 is linearly fitted with the corresponding detector's channel.…”

Section: Data Reduction Proceduresmentioning

confidence: 99%

“…In addition, ∆E detectors 500 µm thick were replaced by those 1000 µm thick to improve particle identification in the high emission energy range. Measurements have been performed in February 2009 at TSL and include production of protons, deuterons, tritons, 3 He and α particles at emitting angles between 20 • to 160 • , in steps of 20 • , from the interaction of 175 MeV neutrons with iron and bismuth. In this paper we present preliminary experimental double differential cross section for proton, deuteron and triton production and we compare them with a model calculation using TALYS-1.0 [9].…”

Section: Introductionmentioning

confidence: 99%

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Neutron induced light-ion production from iron and bismuth at 175 MeV

Bevilacqua

Pomp

Simutkin

et al. 2010

Radiation Measurements

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Abstract.We have measured light-ion (p, d, t, 3 He and α) production in the interaction of 175 MeV neutrons with iron and bismuth, using the MEDLEY setup. A large set of measurements at 96 MeV has been recently completed and published, and now higher energy region is under investigation. MEDLEY is a conventional spectrometer system that allows low-energy thresholds and offers measurements over a wide angular range. The system consists of eight telescopes, each of them composed of two silicon surface barrier detectors, to perform particle identification, and a CsI(Tl) scintillator to fully measure the kinetic energy of the produced light-ions. The telescopes are placed at angles from 20 • to 160 • , in steps of 20 • . Measurements have been performed at The Svedberg Laboratory, Uppsala (Sweden), where a quasi mono-energetic neutron beam is available and well characterized. Time of flight techniques are used to select light-ion events induced by neutrons in the main peak of the source neutron spectrum. We report preliminary double differential cross sections for production of protons, deuterons and tritons in comparison with model calculations using TALYS-1.0 code.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Methodsmentioning

confidence: 99%

Section: Data Reduction Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Neutron induced light-ion production from iron and bismuth at 175 MeV

Bevilacqua

Pomp

Simutkin

et al. 2010

Radiation Measurements

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“…A description of the neutron fields provided at the the Svedberg Laboratory (TSL) may be found in the paper by Prokofiev et al (16) . The average energies of the peaks of the fluence distributions for the neutron beams which can be provided range from 11 to 175 MeV (see Figure 1 for an example).…”

Section: Tsl Swedenmentioning

confidence: 99%

High-energy quasi-monoenergetic neutron fields: existing facilities and future needs

Pomp

Bartlett²,

Mayer

et al. 2013

Radiation Protection Dosimetry

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The argument that well-characterised quasi-monoenergetic neutron (QMN) sources reaching into the energy domain >20 MeV are needed is presented. A brief overview of the existing facilities is given, and a list of key factors that an ideal QMN source for dosimetry and spectrometry should offer is presented. The authors conclude that all of the six QMN facilities currently in existence worldwide operate in sub-optimal conditions for dosimetry. The only currently available QMN facility in Europe capable of operating at energies >40 MeV, TSL in Uppsala, Sweden, is threatened with shutdown in the immediate future. One facility, NFS at GANIL, France, is currently under construction. NFS could deliver QMN beams up to about 30 MeV. It is, however, so far not clear if and when NFS will be able to offer QMN beams or operate with only so-called white neutron beams. It is likely that by 2016, QMN beams with energies >40 MeV will be available only in South Africa and Japan, with none in Europe.Neutron sources are used and neutron radiation fields are generated in various scientific research areas and applications. Examples include radiation therapy, radionuclide production, material science studies, design of electronic components and energy production. High-energy neutrons are the dominant component of the prompt radiation field present outside the shielding of high-energy accelerators and are a significant component of the cosmic radiation fields in aircraft and in spacecraft. In radiotherapy using highenergy medical accelerators, high-energy neutrons are a secondary component of the fields in the beam delivery system and in the patient's body. The energy range of neutrons in these fields extends from thermal energies to several GeV. High-energy neutron fields are gaining more attention owing to the increasing number of high-energy accelerators in research and medicine, and the special consideration given to the occupational exposure to cosmic radiation. In order to study the physics of neutron interactions in these applications, in particular concerning dosimetry, radiation protection monitoring of workplaces, and radiation effects in electronics, especially those used in aircraft and in spacecraft, well-characterised neutron fields for high energies are needed.In medical applications, using high-energy photons and ion beams for cancer treatment, one must consider the contribution of secondary neutrons to organs in the human body outside the target area (1,2) .The neutron exposure of staff has to be included in the design and operation of the facility: the contribution of fast neutrons outside of the shielding was for a long time underestimated. In the environment outside the primary beam the neutron contribution to human radiation exposure can dominate, and neutrons with energies .10-20 MeV account for up to 50 % of the ambient dose equivalent. Dosimetry for exposures to cosmic radiation in aircraft is specified in International Organization for Standardization (ISO) standards, see for example ref. (3), and a compilation ...

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