The radioactive beam facility ALTO

Essabaa, S.; Barré-Boscher, Nicole; Mhamed, M. Cheikh; Cottereau, E.; Franchoo, S.; Ibrahim, F.; Lau, C.; Roussière, B.; Said, A.; Tusseau‐Nenez, Sandrine; Verney, D.

doi:10.1016/j.nimb.2013.06.029

Cited by 22 publications

(13 citation statements)

References 14 publications

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“…Yields for several isotopes have been measured [11] and have been extrapolated to the full range of accessible fission fragments [12]. The obtained numbers at 100 nA of electrons were comparable to those of earlier measurements at Orsay for a deuteron beam of 14 MeV and 1 µA, confirming the prospect of an increased output of the facility by a factor of 100 when Alto is run at its nominal intensity of 10 µA.…”

Section: The Photofission Facilitysupporting

confidence: 60%

The Alto Tandem and Isol Facility at IPN Orsay

Franchoo¹

2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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Alto is an infrastructure for experimental nuclear physics in France that comprises both an on-line isotope-separation facility based on the photofission of uranium and a stableion beam facility based on a 14.5-MV tandem accelerator. The isotope-separation on-line section of Alto is dedicated to the production of neutron-rich radioactive ion beams (RIB) from the interaction of the γ-flux induced by a 50-MeV 10-µA electron beam in a uraniumcarbide target. It is dimensioned for 10 11 fissions per second. The RIB facility is exploited in alternating mode with the tandem-based section of Alto, capable of accelerating both light ions for nuclear astrophysics and heavy ions for γ-spectroscopy. The facility thereby offers the opportunity to deliver beams to a large range of physics programmes from nuclear to interdisciplinary physics. In this article, we present the Alto facility as well as some of the highlights and prospects of the experimental programme.

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Section: The Photofission Facilitysupporting

confidence: 60%

The Alto Tandem and Isol Facility at IPN Orsay

Franchoo¹

2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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“…6 In the ISOL technique MeV-GeV proton beams, 7, 8 secondary neutrons, 9 or secondary gamma rays 10 impinging onto target nuclei such as Ta or U are used to produce radionuclides by means of spallation, fragmentation, and fission processes. The delivered rare isotope beam (RIB) is composed of all produced nuclides that effuse out of the target, become ionized, and are not filtered by the online mass separators.…”

Section: Introductionmentioning

confidence: 99%

“…The resonance ionization laser ion source (RILIS) provides element-selective ionization and therefore selectively enhances the yield of the isotope of interest. It is used or foreseen at many ISOL facilities such as ISOLDE, 11 ISAC, 12 HRIBF, 13 IRIS, 14 ALTO, 10 SPIRAL, 15 SPES 16 as well as at on-line facilities with a gas cell stopper such as IGISOL, 17 LISOL, 18 and SLOWRI. 19 Although resonant laser ionization increases the yield of a desired element, the problem of surface-ionized background remains.…”

Section: Introductionmentioning

confidence: 99%

An ion guide laser ion source for isobar-suppressed rare isotope beams

Raeder

Heggen

Lassen

et al. 2014

Review of Scientific Instruments

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Modern experiments at isotope separator on-line (ISOL) facilities like ISAC at TRIUMF often depend critically on the purity of the delivered rare isotope beams. Therefore, highly selective ion sources are essential. This article presents the development and successful on-line operation of an ion guide laser ion source (IG-LIS) for the production of ion beams free of isobaric contamination. Thermionic ions from the hot ISOL target are suppressed by an electrostatic potential barrier, while neutral radio nuclides effusing out are resonantly ionized by laser radiation within a quadrupole ion guide behind this barrier. The IG-LIS was developed through detailed thermal and ion optics simulation studies and off-line tests with stable isotopes. In a first on-line run with a SiC target a suppression of surface-ionized Na contaminants in the ion beam of up to six orders of magnitude was demonstrated.

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“…In 2012, at the ALTO facility [1,2], a new project was started. The aim was to add neutron beam production capability to this facility in prevision of the NFS project [3] start at GANIL.…”

Section: Presentation Of the Licorne Neutron Sourcementioning

confidence: 99%

Studies forγ-ray emission in the fission process with LICORNE

Lebois

Wilson

Liqiang

et al. 2016

EPJ Web of Conferences

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Abstract. The LICORNE neutron source is a new device at the ALTO facility. Its use of inverse kinematics makes the production of naturally focused neutron beams possible with an energy range of 0.5 to 4 MeV. This is perfect for any studies concerning fast neutron induced reaction based on detection setup that require to be placed in a compact geometry -such as Ge based γ detection setup. In this paper, neutron production with LICORNE is described. The development of a gas cell target and the extension of the energy range up to 7 MeV with the p( 11 B,n) 11 C are presented. An overview of the major research fields studied with LICORNE is given and two types of experiment are presented. The first one dedicated to prompt fission γ-ray emission in fission, as a function of incident neutron energy, is described. Some preliminary results are shown. The second, in the context of the MINORCA campaign, is detailed. The most recent outcomes in the data analysis process are also presented.

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The radioactive beam facility ALTO

Cited by 22 publications

References 14 publications

The Alto Tandem and Isol Facility at IPN Orsay

The Alto Tandem and Isol Facility at IPN Orsay

An ion guide laser ion source for isobar-suppressed rare isotope beams

Studies forγ-ray emission in the fission process with LICORNE

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