An Electron Beam Ion Trap (EBIT) Plus a Microcalorimeter: A Good Combination for Laboratory Astrophysics
An Electron Beam Ion Trap (EBIT) Plus a Microcalorimeter: A Good Combination for Laboratory Astrophysics
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DOI：
10.1088/0031-8949/2005/t119/005
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发表时间：
2005
期刊：
影响因子：
2.9
通讯作者：
J. Tan;E. Silver;J. Pomeroy;J. Laming;J. Gillaspy
中科院分区：
文献类型：
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作者：
J. Tan;E. Silver;J. Pomeroy;J. Laming;J. Gillaspy
原则上，息税前利润可以选择性地产生每种自然存在元素的任何电荷状态，对原子碰撞过程有很好的控制，并且可以为分析具有天体物理学重要性的高度电离等离子体产生近乎理想的条件。微量热计能够在许多宇宙x射线源发射其大部分能量（0.2 keV - 10 keV）的能量范围内以高能量分辨率和近单位量子效率宽带探测x射线发射。EBIT+微热量计的组合为实验室研究宇宙x射线源能量释放机制的原子/等离子体过程提供了一个强大的工具。我们简要地描述了由史密森天体物理天文台（SAO）建造并部署在NIST EBIT上的微热量计的一些早期实验。我们还介绍了一些最近的观测结果，这些观测结果是由SAO建造的更先进的微热量计，可以获得4.5 eV的能量分辨率。新系统产生的更高光谱质量将有助于对x射线天文学感兴趣的实验室测量。
An EBIT can selectively create, in principle, any charge state of every naturally occurring element, has good control on atomic collision processes, and can produce nearly ideal conditions for the analysis of highly ionized plasmas of astrophysical importance. A microcalorimeter enables the broadband detection of x-ray emission with high energy resolution and near-unity quantum efficiency in the energy range wherein many cosmic x-ray sources emit the bulk of their energy (0.2 keV–10 keV). The combination (EBIT+ microcalorimeter) provides a powerful tool for laboratory studies of the atomic/plasma processes underlying the energy release mechanisms in cosmic x-ray sources. We briefly describe some early experiments with a microcalorimeter built by the Smithsonian Astrophysical Observatory (SAO) and deployed on the NIST EBIT. We also present some very recent observations with a more advanced microcalorimeter built by SAO that can obtain an energy resolution of 4.5 eV. The higher spectral quality produced by the new system will be useful in laboratory measurements of interest in x-ray astronomy.