Development of the Apparatus for Visualizing Stratospheric Chemical Reactions

平流层化学反应可视化装置的研制

• 批准号: 08559014
• 负责人: SUZUKI Toshinori
• 金额: $ 10.75万
• 依托单位: Okazaki National Research Institutes
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 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-08559014/
• 关键词: Stratospheric reactions; Grossed molecular beams; Imaging; 散乱; レーザー; オゾン層; 酸素分子

A new crossed molecular beam apparatus with a high-resolution ion imaging detector is described. Two pulsed supersonic molecular beams are crossed at the right angle in a vacuum of 10^<-7> Torr. The collision region is irradiated with a tunable laser pulse that ionizes the scattered particles state-selectively. The generated ions are accelerated by stacked electrodes in a two-dimensional (2D) space focusing mode that increases velocity resolution of the apparatus. A cylindrical hexapole deflector placed in the middle of the time-of-flight mass spectrometer compensates the center-of-mass velocity of the ions and directs them to the center of the 2D imaging detector. Real-time image processing of a CCD camera signal eliminates the blurring of the imaging detector. The performance of the apparatus was examined by observing the inelastic scattering of NO + Ar at the collision energy of 66 meV.The observed multiple rainbow peaks clearly demonstrate high performance of the apparatus.

本文介绍了一种新的交叉分子束装置和高分辨离子成像探测器。两束脉冲超声分子束在10^ Torr的真空中以直角交叉<-7>。碰撞区域用可调谐激光脉冲照射，该激光脉冲使散射粒子状态选择性地电离。所产生的离子由堆叠电极以二维（2D）空间聚焦模式加速，这增加了设备的速度分辨率。放置在飞行时间质谱仪中间的圆柱形六极偏转器补偿离子的质心速度，并将它们引导到2D成像检测器的中心。CCD相机信号的实时图像处理消除了成像检测器的模糊。通过观察NO + Ar在66 meV的碰撞能量下的非弹性散射来检验该装置的性能。观察到的多个彩虹峰清楚地表明该装置的高性能。

项目成果

Mo et al.: "Probing the alignment of NO(X^2Pi)by(2+1)resonance enhanced multiphoton ionization" Journal of Chemical Physics. 110. 2029-2041 (1999)

Mo 等人：“通过 (2 1) 共振增强多光子电离探测 NO(X^2Pi) 的排列”化学物理杂志。

Toshinori Suzuki et al.: "Non-adiabatic bending dissociation in 16 valence electron system OCS"Journal of Chemical Physics. 109. 5778-5794 (1998)

Toshinori Suzuki等人：“16价电子系统OCS中的非绝热弯曲解离”化学物理杂志。

Nobuaki Yonekura et al.: ""Crossed beam apparatus using high-resolution ion imaging"" Review of Scientific Instruments. (in press.).

Nobuaki Yonekura 等人：“使用高分辨率离子成像的交叉束装置”科学仪器评论。

Nobuhisa Hashimoto and Toshinori Suzuki: ""Predissociation of acetylene from the A(^1A_u) state studied by absorption, LIF, and H-atom action spectrocopies"" Jouranal of Chemical Physics. 110. 2041-2050 (1999)

Nobuhisa Hashimoto 和 Toshinori Suzuki：“通过吸收、LIF 和 H 原子作用光谱研究乙炔从 A(^1A_u) 态的预解离”《化学物理杂志》。

T.Suzuki, et al.: "Detection of metastable triplet acetylene produced by intersystem crossing from the excited A('Au) state" J.Chem.Phys.106. 5292-5295 (1997)

T.Suzuki 等人：“检测由激发 A(Au) 态的系间跨越产生的亚稳态三线态乙炔”J.Chem.Phys.106。