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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research >Design of SECAR a recoil mass separator for astrophysical capture reactions with radioactive beams
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Design of SECAR a recoil mass separator for astrophysical capture reactions with radioactive beams

机译：SECAR反冲质量分离器的设计，用于利用放射性束进行天体物理捕获反应

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摘要

A recoil mass separator SECAR has been designed for the purpose of studying low-energy (p, y) and (a, y) reactions in inverse kinematics with radioactive beams for masses up to about A = 65. Their reaction rates are of importance for our understanding of the energy production and nucleosynthesis during explosive hydrogen and helium burning. The radiative capture reactions take place in a windowless hydrogen or He gas target at the entrance of the separator, which consists of four Sections. The first Section selects the charge state of the recoils. The second and third Sections contain Wien Filters providing high mass resolving power to separate efficiently the intense beam from the few reaction products. In the following fourth Section, the reaction products are guided into a detector system capable of position, angle and time-of-flight measurements. In order to accept the complete kinematic cone of recoil particles including multiple scattering in the target in the center of mass energy range of 0.2 MeV to 3.0 MeV, the system must have a large polar angle acceptance of ± 25 mrad. This requires a careful minimization of higher order aberrations. The present system will be installed at the NSCL ReA3 accelerator and will be used with the much higher beam intensities of the FRIB facility when it becomes available.
机译：设计反冲质量分离器SECAR的目的是研究质量不超过A = 65的带有放射性束的逆运动学中的低能（p，y）和（a，y）反应。它们的反应速率对于我们对爆炸性氢气和氦气燃烧过程中的能量产生和核合成的了解。辐射捕获反应在分离器入口处的无窗氢气或氦气靶中发生，该靶由四个部分组成。第一部分选择后座力的充电状态。第二部分和第三部分包含维恩过滤器，它们提供高质量的分辨能力，可有效地将强光束与少量反应产物分离开。在接下来的第四部分中，将反应产物导入能够进行位置，角度和飞行时间测量的检测器系统。为了接受完整的反冲粒子运动锥，包括目标在0.2 MeV至3.0 MeV质心能量范围内的多次散射，系统必须具有±25 mrad的大极角接受度。这需要小心地最小化高阶像差。本系统将安装在NSCL ReA3加速器上，并在可用时与FRIB设施更高的光束强度一起使用。

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  • 作者

    G.P.A. Berg; M. Couder; M.T. Moran; K. Smith; M. Wiescher; H. Schatz; U. Hager; C. Wrede; F. Montes; G. Perdikakis; X. Wu; A. Zeller; M.S. Smith; D.W. Bardayan; K.A. Chipps; S.D. Pain; J. Blackmon; U. Greife; K.E. Rehm; R.V.F. Janssens;

  • 作者单位

    Department of Physics, University of Noire Dame, Noire Dame, IN 46556, USA,The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Physics, University of Noire Dame, Noire Dame, IN 46556, USA,The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Physics, University of Noire Dame, Noire Dame, IN 46556, USA,The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Physics, University of Noire Dame, Noire Dame, IN 46556, USA,The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Physics, University of Noire Dame, Noire Dame, IN 46556, USA,The Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, IN 46556, USA;

    Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA,National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA,The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA;

    Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA,National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA,The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA;

    Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA,National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA,The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA;

    National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA,The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA;

    National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA,The Joint Institute for Nuclear Astrophysics, Michigan State University, East Lansing, MI 48824, USA;

    National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA;

    National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA;

    Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

    Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

    Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

    Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA;

    Department of Physics, Colorado School of Mines, Golden, CO 80401, USA;

    Physics Division, Argonne National Laboratory, Argonne, 1L 60439, USA;

    Physics Division, Argonne National Laboratory, Argonne, 1L 60439, USA;

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  • 正文语种 eng
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  • 关键词

    Recoil mass separator; Wien filter; Radiative proton and alpha capture;

    机译：反冲质量分离器;维恩过滤器;辐射质子和阿尔法俘获;

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