Present and future perspectives for high energy density physics with intense heavy ion and laser beams
Present and future perspectives for high energy density physics with intense heavy ion and laser beams
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DOI：
10.1017/s026303460505010x
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发表时间：
2005-03
影响因子：
0.9
通讯作者：
D. Hoffmann;A. Blažević;P. Ni;O. Rosmej;M. Roth;N. Tahir;A. Tauschwitz;S. Udrea;D. Varentsov;K. Weyrich;Y. Maron
中科院分区：
文献类型：
--
作者：
D. Hoffmann;A. Blažević;P. Ni;O. Rosmej;M. Roth;N. Tahir;A. Tauschwitz;S. Udrea;D. Varentsov;K. Weyrich;Y. Maron
来自德国达姆施塔特Schwerionenforschung ~GSI的强烈重离子束！加速器设施，以及两个高能激光系统：用于离子实验的petawatt高能激光器~PHELIX！和用于离子实验的纳秒高能激光器~NHELIX！是一个独特的组合，以促进开创性的束等离子体相互作用实验，产生和探测高能量密度~HED！物质和解决与重离子驱动惯性约束聚变相关的基本物理问题。在一类实验中，将利用激光产生等离子体，利用离子束研究电离物质中高能离子的能量损失，探测激光产生的等离子体的物理状态。在另一类实验中，强烈的重离子束将被用来制造HED物质的样本，激光束将与其他诊断工具一起用于探索这些奇异物质状态的特性。现有的重离子同步加速器装置，SIS18，提供一种强铀束，在固体物质中沉积约1千焦当量的比能。利用这种光束，最近进行了实验，固体铅箔被加热，亮度温度约为5000 K，使用的是由GSI和IPCP Chernogolovka联合开发的快速多通道高温计。预计未来重离子设施、反质子设施和离子研究~FAIR！将提供压缩光束脉冲，其强度超过当前光束强度三个数量级。这将为探索HED物质的热物理和输运特性提供可能性，而传统的激波压缩方法很难获得这些特性。用g参数在0.5 ~ 1.5之间的致密等离子体进行了束等离子体相互作用实验。这种致密的Ar等离子体是由爆炸驱动的冲击波产生的，在5.9至11.4 MeV的能量范围内，Xe和Ar离子的能量损失增加。
Intense heavy ion beams from the Gesellschaft fur Schwerionenforschung ~GSI, Darmstadt, Germany! accelerator facilities, together with two high energy laser systems: petawatt high energy laser for ion experiments ~PHELIX! and nanosecond high energy laser for ion experiments ~NHELIX! are a unique combination to facilitate pioneering beam-plasma interaction experiments, to generate and probe high-energy-density ~HED! matter and to address basic physics issues associated with heavy ion driven inertial confinement fusion. In one class of experiments, the laser will be used to generate plasma and the ion beam will be used to study the energy loss of energetic ions in ionized matter, and to probe the physical state of the laser-generated plasma. In another class of experiments, the intense heavy ion beam will be employed to create a sample of HED matter and the laser beam, together with other diagnostic tools, will be used to explore the properties of these exotic states of matter. The existing heavy ion synchrotron facility, SIS18, deliver an intense uranium beam that deposit about 1 kJ0g specific energy in solid matter. Using this beam, experiments have recently been performed where solid lead foils had been heated and a brightness temperature on the order of 5000 K was measured, using a fast multi-channel pyrometer that has been developed jointly by GSI and IPCP Chernogolovka. It is expected that the future heavy ion facility, facility for antiprotons and ion research ~FAIR! will provide compressed beam pulses with an intensity that exceeds the current beam intensities by three orders of magnitude. This will open up the possibility to explore the thermophysical and transport properties of HED matter in a regime that is very difficult to access using the traditional methods of shock compression. Beam plasma interaction experiments using dense plasmas with a G-parameter between 0.5 and 1.5 have also been carried out. This dense Ar-plasma was generated by explosively driven shockwaves and showed enhanced energy loss for Xe and Ar ions in the energy range between 5.9 to 11.4 MeV.