Electron-Ion Collision Experiments at the High Density Ion Beams

高密度离子束下的电子-离子碰撞实验

• 批准号: 16540363
• 负责人: SAKAUE Hiroyuki
• 金额: $ 2.37万
• 依托单位: National Institute for Fusion Science
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16540363/
• 关键词: electron impact; excitation process; Auger; ionization cross section

The understanding of the interaction of electron-ion collision process is important not only for the control and diagnostic of plasma but also for the atomic physics at many atomic processes in high temperature plasma. The research of ionization process in the electron-ion collision have been done for a long time, and the data was offered to the plasma control, the diagnostics of plasma and so on. At present, however, there are few atomic data for the excitation processes of electron-ion collisions, because of its experimental difficulties such as a low signal-to-noise ratio due to a low target ion density and very small cross sections, etc.We developed the exclusive high-density ion source for the collision experiments. Then, the original tandem type electrostatic energy analyzer was developed at the same time. We fine-tuned the electron energy analyzer using the Auger spectrum at the electron atom collisions.We observed the NOO Auger spectrum in electron-Xe atom collisions. These Aug … More er electrons are emitted in following processes, e + Xe→Xe^<+*> (4d^95s^25p^6) + e + e→Xe^2 + (4d^<10>5s^25p^4)+e_<ej>・Then, Auger electrons of N_<4,5>O_<2,3>O_<2,3> are dominant. The line of N_<4,5>O_1O_<2,3> Auger processes are observed. The energy resolution of our spectrum is about 50meV. From these experiments, we ascertained that our energy analyzer was completed as the design.We measured the ion beam current dependence of N_<4,5>O_<2,3>O_<2,3> Auger spectrum in electron-Xe collisions within the Xe^+ ion beam. When the Xe^+ ion beam current was 1.0 μA, Auger spectrum peaks were separated respectively. But at 6.0 μA, these Auger spectrum peaks are broading and shifted to the low energy side. These phenomena are attributed to the electric field distribution of the location where Auger electrons are generated. Therefore we can estimate the space charge effect for the Xe^+ ion by analyzing this spectrum. We required canceling out this space charge at the ejected electron spectroscopy in electron-ion collision. Then we are doing the tests of canceling out the space charge at present. One is the direct electron supply method using electron shower and another is the electric field supply method using a tungsten coil. From now on, we will establish the most suitable method of canceling out the ion space charge and try the ejected electron spectroscopy in the electron-ion collisions. Less

对电子离子碰撞过程相互作用的理解不仅对血浆的控制和诊断很重要，而且对于高温等离子体中许多原子过程的原子物理学也很重要。电子离子碰撞中电离过程的研究已经进行了很长时间，并将数据提供给血浆控制，等离子体的诊断等。然而，目前，由于其实验难度（例如，由于低靶离子密度和非常小的横截面，因此具有较低的信噪比），因此对于电子离子碰撞的兴奋过程而言，原子数据很少。然后，同时开发了原始的串联型静电分析仪。我们使用电子原子碰撞的螺旋谱谱对电子能量分析仪进行了微调。我们观察到电子XE原子碰撞中的NOO螺旋谱。这些8月…更多的ER电子在以下过程中发出，E + Xe→Xe^< +*>（4D^95s^25p^6） + E + E→Xe^2 +（4d^<10> 5S^25p^4） + E_> e_> e_> ej>远，然后，N_ <4,5> o_ <2,3> o__ <2,3> o__ <2,3> o__ <2,3> o <2,3> 3>观察到N_ <4,5> O_1O_ <2,3>螺旋进程的线。我们频谱的能量分辨率约为50mev。从这些实验中，我们确定了我们的能量分析仪在设计时完成。我们测量了XE^+离子束中电子XE碰撞中N_ <4,5> O_ <2,3> O_ <2,3> O_ <2,3> O_ <2,3> O_ <2,3>振动仪。当Xe^+离子束电流为1.0μa时，分别分离了螺旋谱峰。但是在6.0μA时，这些螺旋频谱峰宽阔，并转移到低能侧。这些现象归因于产生螺旋电子的位置的电场分布。因此，我们可以通过分析该频谱来估计Xe+离子的空间电荷效应。我们需要在电子离子碰撞中的估计电子光谱上取消该空间电荷。然后，我们正在进行取消目前取消空间费用的测试。一种是使用电子淋浴的直接电子供应方法，另一种是使用钨线圈的电场供应法。从现在开始，我们将建立最合适的方法来取消离子空间电荷，并尝试电子离子碰撞中弹出的电子光谱。较少的

项目成果

Development of electron beam ion source for nanoprocess using highly charged ions

使用高电荷离子开发用于纳米工艺的电子束离子源

• 发表时间: 2005
• 期刊: Nuclear Instruments and Methods in Physics Research Section B 235
• 作者: M.Sakurai;F.Nakajima;T.Fukumoto;N.Nakamura;S.Ohtani;S.Mashiko;H.A.Sakaue.
• 通讯作者: H.A.Sakaue.

Total Electron Transfer Cross Sections for Highly Charged Ion - Alkali Metal Atom Collisions

高电荷离子 - 碱金属原子碰撞的总电子转移截面

• 发表时间: 2006
• 期刊: Journal of Plasma Fusion Research Series Vol.7
• 作者: H.A.Sakaue;K.Hosaka;H.Tawara;I.Yamada;N.Nakamura;S.Ohtani;A.Danjo;M.Kimura;A.Matsumoto;M.Sakurai;M.Yoshino.
• 通讯作者: M.Yoshino.

Total Electron Transfer Cross Sections for Highly Charged Ion-Alkali Metal Atom Collisions

高电荷离子-碱金属原子碰撞的总电子转移截面

• 发表时间: 2006
• 期刊: Journal of Plasma Fusion Research Series Vol.7
• 作者: H.A.Sakaue;K.Hosaka;H.Tawara;I.Yamada;N.Nakamura;S.Ohtani;A.Danjo;M.Kimura;A.Matsumoto;M.Sakurai;M.Yoshino
• 通讯作者: M.Yoshino

Recent activities at the Tokyo EBIT 2006

• DOI: 10.1139/p07-111
• 发表时间: 2008
• 期刊: Canadian Journal of Physics
• 影响因子: 1.2
• 作者: N. Nakamura;F. Currell;D. Kato;A. Kavanagh;Yueming Li;S. Ohtani;H. Sakaue;M. Sakurai;Jian-Xin Sun;Satoshi Takahashi;M. Tona;H. Watanabe;C. Yamada;Nobuo Yoshiyasu

Highly Charged Ion in Plasmas and Atomic Processes

等离子体和原子过程中的高电荷离子

• 发表时间: 2005
• 期刊: J.Vac.Soc.Jap. Vol.48
• 作者: H.A.Sakaue;D.Kato
• 通讯作者: D.Kato