Efficient extreme ultraviolet emission from one-dimensional spherical plasmas produced by multiple lasers
Efficient extreme ultraviolet emission from one-dimensional spherical plasmas produced by multiple lasers
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DOI：
10.7567/apex.7.086202
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发表时间：
2014-07
影响因子：
2.3
通讯作者：
Kensuke Yoshida;S. Fujioka;T. Higashiguchi;Teruyuki Ugomori;N. Tanaka;H. Ohashi;M. Kawasaki;Yuhei Suz
中科院分区：
文献类型：
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作者：
Kensuke Yoshida;S. Fujioka;T. Higashiguchi;Teruyuki Ugomori;N. Tanaka;H. Ohashi;M. Kawasaki;Yuhei Suz
我们证明了高转换效率的极紫外（EUV）发射在6.5-6.7 nm的多束激光产生的一维球形等离子体。多电荷态离子产生强的共振发射线，这些线联合收割机在Gd、Tb和Mo中产生强烈的未分辨跃迁阵列（UTAs）。在1 × 1012 W/cm 2的最佳激光强度下，估计产生约100 eV的电子温度，观察到最大带内EUV转换效率（CE）为0.8%，这是有史以来报道的最高值之一，由于等离子体膨胀损失的减少。
We demonstrate high conversion efficiency for extreme ultraviolet (EUV) emission at 6.5–6.7 nm from multiple laser beam-produced one-dimensional spherical plasmas. Multiply charged-state ions produce strong resonance emission lines, which combine to yield intense unresolved transition arrays (UTAs) in Gd, Tb, and Mo. At an optimum laser intensity of 1 × 1012 W/cm2, which is estimated to yield an electron temperature of around 100 eV, the maximum in-band EUV conversion efficiency (CE) was observed to be 0.8%, which is one of the highest values ever reported due to the reduction of plasma expansion loss.