Determination of the charge state distribution of a highly ionized coronal Au plasma.
Determination of the charge state distribution of a highly ionized coronal Au plasma.
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DOI：
10.1103/physrevlett.90.235001
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发表时间：
2003-06
影响因子：
8.6
通讯作者：
K. Wong;M. May;P. Beiersdorfer;K. Fournier;B. Wilson;G. Brown;P. Springer;P. Neill;C. Harris-C.
中科院分区：
文献类型：
--
作者：
K. Wong;M. May;P. Beiersdorfer;K. Fournier;B. Wilson;G. Brown;P. Springer;P. Neill;C. Harris-C.
在日冕平衡条件下，我们首次对高电离金等离子体的电荷态分布进行了确定性测量。这项实验利用利弗莫尔电子束离子陷阱EBIT-II以一种新的配置创建了麦克斯韦温度为2.5keV的等离子体。等离子体中的电荷平衡是由考虑电荷交换效应的谱线发射测量推断出来的。测得的平均电离态为46.8+/-0.75。这与两个建模代码的预测最多不同四个电荷状态。
We present the first definitive measurement of the charge state distribution of a highly ionized gold plasma in coronal equilibrium. The experiment utilized the Livermore electron beam ion trap EBIT-II in a novel configuration to create a plasma with a Maxwellian temperature of 2.5 keV. The charge balance in the plasma was inferred from spectral line emission measurements which accounted for charge exchange effects. The measured average ionization state was 46.8+/-0.75. This differs from the predictions of two modeling codes by up to four charge states.