The SPIRAL 2 Project

doi:10.1063/1.2713504

Title: The SPIRAL 2 Project

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Abstract

The project of an important new extension of the GANIL facility - SPIRAL 2 - is shortly presented. The physics case of the facility is based on the use of high intensity stable and radioactive beams. Expected performances and main technical parameters of the facility as well as planned new experimental areas and detectors are shortly described.

Authors:

Lewitowicz, Marek ^[1]

Grand Accelerateur d'Ions Lourds - GANIL, CEA/DSM-CNRS/IN2P3, BP 55027, 14076 Caen Cedex (France)

Publication Date:: Mon Feb 26 00:00:00 EST 2007

OSTI Identifier:: 21056785

Resource Type:: Journal Article

Resource Relation:: Journal Name: AIP Conference Proceedings; Journal Volume: 891; Journal Issue: 1; Conference: 6. Symposium on nuclear physics, Tours (France), 5-8 Sep 2006; Other Information: DOI: 10.1063/1.2713504; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA). Collaboration: SPIRAL 2 Project Group

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAM PRODUCTION; GANIL CYCLOTRON; HEAVY ION REACTIONS; PERFORMANCE; RADIATION DETECTORS; RADIOACTIVE ION BEAMS

Citation Formats


                    Lewitowicz, Marek. The SPIRAL 2 Project.  United States: N. p., 2007. 
        Web.  doi:10.1063/1.2713504.

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                    Lewitowicz, Marek. The SPIRAL 2 Project.  United States.  doi:10.1063/1.2713504.

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                    Lewitowicz, Marek. Mon .  
        "The SPIRAL 2 Project".  United States.  
        doi:10.1063/1.2713504.

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@article{osti_21056785,

  title        = {The SPIRAL 2 Project},

  author       = {Lewitowicz, Marek},

  abstractNote = {The project of an important new extension of the GANIL facility - SPIRAL 2 - is shortly presented. The physics case of the facility is based on the use of high intensity stable and radioactive beams. Expected performances and main technical parameters of the facility as well as planned new experimental areas and detectors are shortly described.},

  doi          = {10.1063/1.2713504},

  journal      = {AIP Conference Proceedings},

  number       = 1,

  volume       = 891,

  place        = {United States},

  year         = {Mon Feb 26 00:00:00 EST 2007},

  month        = {Mon Feb 26 00:00:00 EST 2007}

}

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DOI: 10.1063/1.2713504

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Development of new radioactive beams, and thus of new target ion sources (TISs) for isotope-separator-on-line production systems are in progress at GANIL for the SPIRAL 2 project. The efficiency and time response measurements of each step in the production process are crucial to predict and maximize the available yields, in particular, for short lived isotopes. This paper presents a method for measuring these quantities that makes use of a stable alkali chopped beam of controlled intensity. This method was applied to surface ionization source test for high efficiency. Results of recent experiments are presented that include ionization efficiency measurements formore »« less
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The quasi-two-dimensional square-lattice antiferromagnet Ba{sub 2}CuGe{sub 2}O{sub 7} was studied by neutron scattering and bulk magnetic techniques. An incommensurate magnetic spiral structure with the propagation vector (1+{zeta},1+{zeta},0) ({zeta}=0.027) was observed below {ital T}{sub {ital N}}=3.26 K. Magnetic ordering occurs with a two-dimensional-like critical exponent {beta}{approx_equal}0.15. The spin dynamics can be adequately described by conventional spin-wave theory with two exchange constants: nearest-neighbor in-plane antiferromagnetic coupling {ital J}{sub 1}{approx_equal}0.48 meV and interplane ferromagnetic interaction {ital J}{sub {perpendicular}}{approx_equal}0.013 meV. This set of exchange parameters apparently fails to explain the spiral order. The noncentrosymmetric crystal structure suggests that the incommensurate phase may be themore »« less
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