A three-dimensional velocity-map imaging setup designed for crossed ion-molecule scattering studies

2021 ◽  
Vol 34 (1) ◽  
pp. 71-80
Author(s):  
Guo-dong Zhang ◽  
Li-chang Guan ◽  
Zi-feng Yan ◽  
Min Cheng ◽  
Hong Gao
Keyword(s):  
Three Dimensional ◽  
Velocity Map Imaging ◽  
Molecule Scattering ◽  
Imaging Setup

Three-dimensional velocity map imaging: Setup and resolution improvement compared to three-dimensional ion imaging

2009 ◽  
Vol 80 (8) ◽  
pp. 083301 ◽  
Author(s):  
S. Kauczok ◽  
N. Gödecke ◽  
A. I. Chichinin ◽  
M. Veckenstedt ◽  
C. Maul ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Velocity Map Imaging ◽  
Ion Imaging ◽  
Resolution Improvement ◽  
Imaging Setup

Three-dimensional (3D) velocity map imaging: from technique to application

2022 ◽  
Author(s):  
Gihan Basnayake ◽  
Yasashri Ranathunga ◽  
Suk Kyoung Lee ◽  
Wen Li
Keyword(s):  
Three Dimensional ◽  
Cost Effective ◽  
Velocity Map Imaging ◽  
Imaging Method ◽  
Translational Energy ◽  
Ion Imaging ◽  
Standard Tool ◽  
Recent Advancement ◽  
Acquisition Speed ◽  
Energy And Angular Distributions

Abstract The velocity map imaging (VMI) technique was first introduced by Eppink and Parker in 1997, as an improvement to the original ion imaging method by Houston and Chandler in 1987. The method has gained huge popularity over the past two decades and has become a standard tool for measuring high-resolution translational energy and angular distributions of ions and electrons. VMI has evolved gradually from 2D momentum measurements to 3D measurements with various implementations and configurations. The most recent advancement has brought unprecedented 3D performance to the technique in terms of resolutions (both spatial and temporal), multi-hit capability as well as acquisition speed while maintaining many attractive attributes afforded by conventional VMI such as being simple, cost-effective, visually appealing and versatile. In this tutorial we will discuss many technical aspects of the recent advancement and its application in probing correlated chemical dynamics.

scholarly journals Three-dimensional velocity map imaging of KBr surface photochemistry

2009 ◽  
Vol 11 (35) ◽  
pp. 7540 ◽  
Author(s):  
Sven P. K. Koehler ◽  
Yuanyuan Ji ◽  
Daniel J. Auerbach ◽  
Alec M. Wodtke
Keyword(s):  
Three Dimensional ◽  
Velocity Map Imaging

scholarly journals Design of Velocity Map Imaging Spectrometer Equipped with a Mass Gate Discriminating Particular Photofragments

2012 ◽  
Vol 2012 ◽  
pp. 1-9
Author(s):  
Koichiro Mitsuke ◽  
Hideki Katayanagi ◽  
Bhim P. Kafle ◽  
Md. Serajul I. Prodhan
Keyword(s):  
Three Dimensional ◽  
Image Plane ◽  
Polyatomic Molecules ◽  
Charge Ratio ◽  
Velocity Map Imaging ◽  
Imaging Spectrometer ◽  
Fragment Ions ◽  
Basic Functions ◽  
Arrival Timing ◽  
Better Than

A photoionization spectrometer for velocity map imaging has been developed for measuring the scattering distribution of fragment ions from polyatomic molecules. The spectrometer contains a mass gate and an ion reflector which are able to discriminate ions with a particular mass-to-charge ratio m/z. The basic functions and feasibility of these devices were tested experimentally and theoretically. First, the photoions from Kr and C60 were extracted into a time-of-flight (TOF) mass spectrometer by a transient or continuous electrostatic field. When the pulse application on the mass gate was tuned to the arrival timing of ions with a specific m/z, the peak of the selected ions alone was present on a TOF spectrum. Second, compatibility between velocity map imaging and ion discrimination was investigated by the computer simulations of the ion trajectories of photofragments from C60. A pulsed voltage was applied to the mass gate synchronously with the arrival timing of C58+ ions. The initial three-dimensional velocity distribution of C58+ was projected onto the image plane with an energy resolution better than 10 meV. The C58+ image was free from the contamination of other ions such as C60+ and C56+.

Complete characterization of the constrained geometry bimolecular reaction O([sup 1]D)+N[sub 2]O→NO+NO by three-dimensional velocity map imaging

2009 ◽  
Vol 131 (5) ◽  
pp. 054307 ◽  
Author(s):  
Niels Gödecke ◽  
Christof Maul ◽  
Alexey I. Chichinin ◽  
Sebastian Kauczok ◽  
Karl-Heinz Gericke
Keyword(s):  
Three Dimensional ◽  
Bimolecular Reaction ◽  
Complete Characterization ◽  
Velocity Map Imaging ◽  
Constrained Geometry

Slicing Using a Conventional Velocity Map Imaging Setup:  O2, I2, and I2+Photodissociation†

2004 ◽  
Vol 108 (39) ◽  
pp. 8100-8105 ◽  
Author(s):  
Dmitri A. Chestakov ◽  
Shiou-Min Wu ◽  
Guorong Wu ◽  
David H. Parker ◽  
André T. J. B. Eppink ◽  
...  
Keyword(s):  
Velocity Map Imaging ◽  
Imaging Setup

The orbit of Pluto over a long interval of time

1966 ◽  
Vol 25 ◽  
pp. 227-229 ◽  
Author(s):  
D. Brouwer
Keyword(s):  
Periodic Orbit ◽  
Numerical Integration ◽  
Restricted Problem ◽  
Three Dimensional ◽  
The Third ◽  
Circular Restricted Problem ◽  
Resonance Relation

The paper presents a summary of the results obtained by C. J. Cohen and E. C. Hubbard, who established by numerical integration that a resonance relation exists between the orbits of Neptune and Pluto. The problem may be explored further by approximating the motion of Pluto by that of a particle with negligible mass in the three-dimensional (circular) restricted problem. The mass of Pluto and the eccentricity of Neptune's orbit are ignored in this approximation. Significant features of the problem appear to be the presence of two critical arguments and the possibility that the orbit may be related to a periodic orbit of the third kind.

Sign in / Sign up

Export Citation Format

Share Document