STUDY OF ATOM MOLECULE COLLISIONS WITH ELECTROSTATIC ION STRAGE RING

静电离子存储环原子分子碰撞研究

• 批准号: 14340124
• 负责人: KOBAYASHI Nobuo
• 金额: $ 9.47万
• 依托单位: Tokyo Metropolitan University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340124/
• 关键词: Ion strage ring; Atom.molecule collision; electrostatic ring

Electrostatic ion storage rings have various advantages : 1)they can store very heavy ions, i.e., not only polyatomic molecular ions, but also cluster, DNA, and amino acid ions, which have not been previously dealt with as beams, 2)they can cool the vibrationally excited states of the molecular ions by emitting radiation during storage, and 3)their practical beam intensity is high due to circulation of beams compared with the traditional one-pass experiment, and they are suitable to merging experiments with electron, neutral and laser beams. By developing the electrostatic ion storage ring and merging experiments with other beams, we aimed to investigate a brand new field in atomic collision like lifetime of excited state of biomolecular ions or their interaction with electron, neutral, positive/negative ion, laser etc..In 2002, we constructed the ring with circumstance of about 8 m and the inside of the ring was kept in a good vacuum of 10^<-11> Torr order. Furthermore, we succeeded in cooling the ring itself down to the liquid nitrogen temperature, which is one of the most important characters of our ring. In 2003, we developed a Duoplasma-type ion source providing positive and negative ions, and prepared both a mass analyser to select ion species and a pulsed ion injection system. In addition we made a neutral product detector placed on the extension of the straight-line section, and a non-destructive beam monitor picking up the induced charge by the beam. We recently succeeded in the circulation of the heavy rare gas ions more than 1000 turns. Soon after tuning of the best operation parameters, we plan to storage molecular ions, and measure its temperature dependence of lifetime and vibrational spectroscopy using a tunable laser.

静电离子存储环具有各种优点：1）它们可以存储非常重的离子，即，不仅是多原子分子离子，而且簇、DNA和氨基酸离子，它们以前没有作为束处理，2）它们可以通过在存储期间发射辐射来冷却分子离子的振动激发态，以及3）与传统的单程实验相比，由于束的循环，它们的实际束强度高，并且它们适合于与电子合并的实验，中性光束和激光束。通过发展静电离子储存环，并与其他束流进行合并实验，我们的目标是研究原子碰撞中的一个全新领域，如生物分子离子的激发态寿命，以及它们与电子、中性、正/负离子、激光等的相互作用。在2002年，我们建造了环的周围约8米，环的内部保持在一个良好的真空10^<-11>托秩序。此外，我们成功地将环本身冷却到液氮温度，这是我们环的最重要特征之一。在2003年，我们开发了一个Duoplasma型离子源，提供正离子和负离子，并准备了一个质量分析器，以选择离子种类和脉冲离子注入系统。此外，我们还制作了一个中性产物探测器，放置在直线段的延长线上，并制作了一个非破坏性的束流监测器，用于拾取束流产生的感应电荷。我们最近成功地使重稀有气体离子循环了1000多圈。在确定最佳操作参数后，我们计划储存分子离子，并利用可调谐激光器测量其寿命和振动光谱的温度依赖性。

项目成果

S.Jinno et al.: "TMU electrostatic ion storage ring designed for operation of liquid nitrogen temperature"Nucl.Instr. Methods. (in press).

S.Jinno等人：“为液氮温度操作而设计的TMU静电离子存储环”Nucl.Instr.

S.Jinno et al.: "TMU electro static ion strage ring designed for operation of liquid nitrogen temperature"Mucl.Instr.Mathods.B. (in press).

S.Jinno 等人：“TMU 静电离子存储环设计用于液氮温度操作”Mucl.Instr.Mathods.B。

S.Jinno et al.: "TMU electrostatic ion storagering designed for operation at liquid nitrogen temperature"Nucl.Instr.Methods. (in press).

S.Jinno 等人：“TMU 静电离子存储环设计用于在液氮温度下操作”Nucl.Instr.Methods。