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

基本信息

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

项目摘要

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势：1）它们可以存储非常重的离子，即不仅是多原子分子离子，而且还可以储存非常重的离子，还可以群集，DNA和氨基酸离子，以前尚未用作梁，它们可以通过在储存过程中发射和3的振动态，它们可以使射线的振动状态与3的振动状态相比，并与3的振动状态相比，它们的实用强度是循环的。一通实验，它们适合与电子，中性和激光束合并实验。通过开发静电离子存储环并将实验与其他光束合并，我们旨在调查原子碰撞中的全新领域，例如生物分子离子激发态的寿命或它们与电子，中性，正/负离子，激光等的相互作用。此外，我们成功地将环本身冷却至液氮温度，这是我们环中最重要的特征之一。 2003年，我们开发了一个双质型离子来源，可提供正离子和负离子，并准备了一个质量分析仪以选择离子物种和脉冲离子注射系统。此外，我们将中性产品检测器放置在直线截面的扩展上，并提供了一个非破坏性梁监视器，从光束拾取了诱导的电荷。最近，我们在重1000圈的重量稀有气体离子的循环中取得了成功。调整最佳操作参数后不久，我们计划使用可调激光器来储存分子离子，并测量其寿命和振动光谱的温度依赖性。