Significance of time-of-flight ion energy spectrum on energy deposition into matter by high-intensity pulsed ion beam
Significance of time-of-flight ion energy spectrum on energy deposition into matter by high-intensity pulsed ion beam
复制标题
飞行时间离子能谱对高强度脉冲离子束能量沉积到物质中的意义
DOI：
10.1017/s0263034610000431
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发表时间：
2010-09
影响因子：
0.9
通讯作者：
Xin, J. P.
中科院分区：
文献类型：
--
作者：
Lei, M. K.;Zhu, X. P.;Xin, J. P.
利用离子飞行时间（TOF）研究了强流脉冲离子束在金属靶上的能量沉积，TOF与离子初始动能E0和离子质量有关。结果表明，TOF效应对注入离子的动能分布和随后的能量沉积过程有着深刻的影响。在350 kV的峰值加速电压下，从磁绝缘离子二极管中提取混合H +和C +的HIPIB，导致靶处的离子电流密度为300 A/cm 2。当到达靶表面时，广泛分布的离子能谱在形状上显著变化，从原始的80 ns持续时间的类高斯脉冲形式到尖锐的前沿和延伸到约140 ns持续时间的长尾。利用蒙特卡罗方法模拟了混合离子注入钛靶的能量损失。能量沉积总体上呈现出变浅的趋势，并可分为两个阶段，H +和C +同时到达。注意，沉积能量分布的峰值出现在混合离子照射阶段的开始，而不是具有峰值动能和峰值离子电流的首先到达的H +的阶段。这项研究表明，离子的TOF效应极大地影响了HIPIB与物质的相互作用，离子撞击靶的动能谱与离子源原始输出的动能谱明显不同;从而可以利用离子能量和离子电流的TOF关联来研究普遍存在的离子能量的特定能量沉积现象，否则在假定根据原始源输出的固定离子能量分布的普通情况下无法获得。
Energy deposition by high-intensity pulsed ion beam into a metal target has been studied with time-of-flight (TOF) of ions which can be related to the original ion kinetic energy E 0 and the ion mass with . It is found that the TOF effect has a profound influence on the kinetic energy distribution of implanted ions and subsequent energy deposition process into the target. The HIPIB of mixed H + and C + was extracted from a magnetically insulated ion diode at a peak accelerating voltage of 350 kV, leading to an ion current density of 300 A/cm 2 at the target. The widespread ion energy spectrum remarkably varied in shape as arriving at the target surface, from the original Gaussian-like of 80-ns duration to a pulse form of a sharp front and a long tail extending to about 140-ns duration. Energy loss of the mixed ions into a Ti target was simulated utilizing a Monte Carlo method. The energy deposition generally showed a shallowing trend and could be divided into two phases proceeded with sequent arrivals of H + and C + . Note that, the peak value of deposited energy profile appeared at the beginning of mixed ion irradiation phase, other than the phase of firstly arrived H + with peak kinetic energy and peak ion current. This study indicated that TOF effect of ions greatly affects the HIPIB-matter interaction with a kinetic energy spectrum of impinging ions at the target, noticeably differing from that of original output of the ion source; consequently, the specific energy deposition phenomena of the widespread ion energy can be studied with the TOF correlation of ion energy and ion current, otherwise not obtainable in common cases assuming fixed ion energy distribution in accordance with the original source output.
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DOI：
10.1103/physreve.61.1975
发表时间：
2000-02
期刊：
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
影响因子：
--
作者：
Tahir;Hoffmann;Kozyreva;Shutov;Maruhn;Neuner;Tauschwitz;Spiller;Bock
通讯作者：
Tahir;Hoffmann;Kozyreva;Shutov;Maruhn;Neuner;Tauschwitz;Spiller;Bock
影响因子：
1.6
作者：
W. A. Noonan;S. Glidden;J. Greenly;D. Hammer
通讯作者：
W. A. Noonan;S. Glidden;J. Greenly;D. Hammer
DOI：
10.1063/1.2999904
发表时间：
2008-10
期刊：
The Review of scientific instruments
影响因子：
--
作者：
H. Ito;H. Miyake;K. Masugata
通讯作者：
H. Ito;H. Miyake;K. Masugata
影响因子：
0.9
作者：
M. Trtica;B. Radak;B. Gaković;D. Milovanović;D. Batani;T. Desai
通讯作者：
M. Trtica;B. Radak;B. Gaković;D. Milovanović;D. Batani;T. Desai
影响因子：
5.4
作者：
Akamatsu, H;Ikeda, T;Yatsuzuka, M
通讯作者：
Yatsuzuka, M