Laboratory Astrophysics Survey of Key X-Ray Diagnostic Lines Using A Microcalorimeter on an Electron Beam Ion Trap
Laboratory Astrophysics Survey of Key X-Ray Diagnostic Lines Using A Microcalorimeter on an Electron Beam Ion Trap
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DOI：
10.1086/309420
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发表时间：
2000-09
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通讯作者：
E. Silver;H. Schnopper;S. Bandler;N. Brickhouse;S. Murray;M. Barbera;E. Takacs;J. Gillaspy;J. V. Porto;I. Kink;J. Laming;N. Madden;D. Landis;J. Beeman;E. Haller
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作者：
E. Silver;H. Schnopper;S. Bandler;N. Brickhouse;S. Murray;M. Barbera;E. Takacs;J. Gillaspy;J. V. Porto;I. Kink;J. Laming;N. Madden;D. Landis;J. Beeman;E. Haller
在电子束离子阱（EBIT）中创建的宇宙等离子体条件使得模拟存在于天体物理源中的关键诊断x射线线对密度、温度和激发条件的依赖成为可能。我们使用微热量计进行这样的实验室天体物理研究，因为它的分辨率约为1000，量子效率接近100%，并且带宽跨越x射线能量从0.2 keV到10 keV。我们的微热量计，加上x射线光学增加有效立体角，为实验室天体物理测量提供了重要的新能力。从国家标准与技术研究所EBIT获得的宽带光谱，其能量分辨率接近布拉格晶体光谱仪，呈现了氮，氧，氖，氩和氪在电离的各个阶段。我们已经将测量到的线强度与息税前等离子体的理论预测进行了比较。
Cosmic plasma conditions created in an electron beam ion trap (EBIT) make it possible to simulate the dependencies of key diagnostic X-ray lines on density, temperature, and excitation conditions that exist in astrophysical sources. We used a microcalorimeter for such laboratory astrophysics studies because it has a resolving power ≈1000, quantum efficiency approaching 100%, and a bandwidth that spans the X-ray energies from 0.2 keV to 10 keV. Our microcalorimeter, coupled with an X-ray optic to increase the effective solid angle, provides a significant new capability for laboratory astrophysics measurements. Broadband spectra obtained from the National Institute of Standards and Technology EBIT with an energy resolution approaching that of a Bragg crystal spectrometer are presented for nitrogen, oxygen, neon, argon, and krypton in various stages of ionization. We have compared the measured line intensities to theoretical predictions for an EBIT plasma.