Sptittering of oxide superconductors by highly charged ions

高电荷离子对氧化物超导体的溅射

• 批准号: 08044166
• 负责人: TERASAWA Michitaka
• 金额: $ 3.01万
• 依托单位: Himeji Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08044166/
• 关键词: Highly Charged Heavy lon; Secondary lon; Sputtering; Time of Flight (TOF); Oxide Super Conductor; Surface of Solid; Electron Beam Ion Source; 多価重イオン; 2次イオン; 電子ビーム衝撃型イオン源; Time of Flight

Electronic excitation effects in solids were investigated by measuring secondary ions emitted from surfaces of solids bombarded by highly charged ions (HCI) beam. HCI beams of I MeV XeィイD1q+ィエD1 (q=8-44) were used to bombard carbon thin foils, solid targets of conductive materials (Al, Ni, Cu, Ag, Si), high Tc super conducting material LaィイD20.85ィエD2SrィイD20.15ィエD2CuOィイD24ィエD2 and insulating material, SiOィイD22ィエD2. The experiment was performed using micro-bunched highly charged Xe ion beams from the cryogenic electron beam ion source (CRYEBIS) at Kansas State University. The secondary ions were detected and mass analyzed by a Time of Flight (TOF) spectrometer. As it is difficult to obtain start signals by secondary electrons from solid targets, our experiment requires electronic signals indicating the arrival of the incoming ions to measure the flight time of secondary ions. Therefore, a pulsed HCI beam is indispensable for our experiment. It is also important to study the fundamental process of the extended defects production in a solid irradiated by high energy heavy ion which is important to improve the electron transport property of high temperature superconductors (HTSC).The secondary ion yields showed a significant increase with increasing projectile charge state q, demonstrating the importance of electronic excitation in the interaction of slow highly charged ions with solids. In the case of the carbon thin foil, the increase rate is very large above q=26. In the case of the conductive materials (Al, Ni, Cu, Ag, Si), the increase rate became larger above q=26 compared to lower charge states, and showed a more prominent increase above q=35. These strong onsets of the increase rate at particular incident charge states can be attributed to the opening up new inner shell holes in the incident highly charged ions.

通过测量从高度电荷离子（HCI）梁轰击的固体表面发出的二级离子来研究固体中的电子兴奋效应。 HCI beams of I MeV Xei D1q+iye D1 (q=8-44) were used to bombard carbon thin foils, solid targets of conductive materials (Al, Ni, Cu, Ag, Si), high Tc super conducting material Laiy D20.85, D2Sriy D20.15, D2CuOiy D24, D2 and insulating material, SiOi D22.实验是使用堪萨斯州立大学的低温电子束离子源（Cryebis）的微型电荷XE离子束进行的。检测到二级离子并通过飞行时间（TOF）光谱仪分析质量。由于很难通过固体目标获得辅助电子的启动信号，因此我们的实验需要电子信号，表明传入离子的到来以测量次级离子的飞行时间。因此，对于我们的实验，脉冲HCI束是必不可少的。研究在高能量重离子固体辐射中的扩展缺陷产生的基本过程也很重要，这对于改善高温超导体的电子传输特性（HTSC）很重要。次离子产量显示出弹丸电荷状态Q的增长显着增加，这表明具有电子激发在固体中的相互作用的重要性，这表明具有固体速度的相互作用的重要性。在碳薄箔的情况下，增加速率非常大于Q = 26。在导电材料（AL，Ni，Cu，Ag，Si）的情况下，与较低电荷状态相比，增加速率大于Q = 26，并且显示出更明显的增加Q = 35。这些在特定事件充电状态下增加速率的强大on可以归因于事件高度充电的离子中的开放壳内壳孔。

项目成果

M.Terasawa, T.Sekioka, T.Mitamura, S.Winecki, M.P.Stockli and C.L.Cocke: "Secondary Ion Enhancement in Slow Highry Charged Heavy Ion Bombardment"Physica Scripta.. Vol.T73. 326-328 (1997)

M.Terasawa、T.Sekioka、T.Mitamura、S.Winecki、M.P.Stockli 和 C.L.Cocke：“慢速高带电重离子轰击中的二次离子增强”Physica Scripta.. Vol.T73。

X. Fan, M. Terasawa, T .Mitamura, T. Kohara, K. Ueda, H. Tsubakino. T. Kambara, Y .Awaya, M. Matsuda, G. Tatara, K. Fukushima and N. Takezawa: "Suppression of vortex motion in aィイD21.85ィエD2SrィイD20.15ィエD2CuOィイD24ィエD2 with the splayed configuration of colum

X. Fan、M. Terasawa、T .Mitamura、T. Kohara、K. Ueda、T. Tsubakino、Y .Awaya、M. Matsuda、G. Tatara、K. Fukushima 和 N. Takezawa：“抑制”具有张开柱结构的 aD21.85D2SrD20.15D2CuOD24D2 中的涡旋运动

M. Terasawa, T .Sekioka,T. Mitamura, S. Winecki, M. P. Stockli and C. L. Cocke: "Secondary Ion Enhancement in Slow Highly Charged Heavy Ion ombardment"Physica Scripta. Vol.T73. 326-328 (1997)

M. Terasawa, T.Sekioka,T.

T.Sekioka: "Electronic excitation effects in the interaction of heavy ions with solids" Book of Abstracts,International Symposium on Atomic Process of Highly charged Heavy ions and cluster Ions. 15-15 (1998)

T.Sekioka：“重离子与固体相互作用中的电子激发效应”摘要集，高电荷重离子和簇离子原子过程国际研讨会。

T.Sekioka, M.Terasawa, M.Sataka and S.Kitazawa: "Emission of Secondary Ions from a Foil Bombarded with High Energy Heavy Ions"Physica Scripta.. Vol.T73. 335-336 (1997)

T.Sekioka、M.Terasawa、M.Sataka 和 S.Kitazawa：“用高能重离子轰击箔片的二次离子发射”Physica Scripta.. Vol.T73。