Velocity Map Imaging Spectrometer

Click For Summary

Discussion Overview

The discussion centers around the basic principles of Velocity Map Imaging (VMI) and its application in mapping the momentum distribution of charged particles. Participants seek to understand the underlying mechanisms and methods associated with VMI, as well as resources for further study.

Discussion Character

  • Exploratory, Technical explanation

Main Points Raised

  • One participant requests an explanation of the basic principle of VMI and study materials.
  • Another participant corrects the spelling of "principle" to "principle."
  • A participant explains that VMI maps the 3D momentum distribution of charged particles into a 2D image, emphasizing the technique's reliance on mapping particles with the same initial momentum vectors emitted from different locations.
  • This explanation includes mention of methods for recovering the 3D distribution from the 2D image, such as Abel inversion, onion peeling, and basis set expansion (BASEX), and suggests a specific chapter in a PDF as a resource.

Areas of Agreement / Disagreement

Participants do not express any disagreement, but the discussion remains open with no consensus on the basic principles or methods of VMI as the initial request for explanation is still being addressed.

Contextual Notes

The discussion does not clarify specific assumptions or limitations regarding the methods mentioned for recovering 3D distributions from 2D images.

Who May Find This Useful

Individuals interested in the principles and applications of Velocity Map Imaging, particularly in the context of charged particle momentum distribution, may find this discussion useful.

Md Rafi
Messages
3
Reaction score
0
Can anyone explain the basic principal of VMI? If it is possible then please give some study material links with your reply.
 
Physics news on Phys.org
*principle
 
Velocity map imaging is used to map the 3D momentum distribution of charged particles such as ions and electrons into 2D image. This equipment relies on its ability to map particles having the same initial momentum vectors but emitted at different locations to arrive in (approximately) the same point at the detector. There have been a couple of methods to recover the 3D distribution from the measured 2D image, this includes Abel inversion, onion peeling, basis set expansion (BASEX), and many others. May be the second chapter in this pdf will help.
 
  • Like
Likes   Reactions: Md Rafi
Thanks a lot.
 

Similar threads

Graduate Surface states of 3D topological insulators
  • · Replies 3 ·
Replies
3
Views
2K
Writing: Read Only Programs to help with stellar cartography
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Maps with the same image are actually different curves?
  • · Replies 21 ·
Replies
21
Views
4K
Graduate Velocity Map Imaging: Understanding 3D Reconstruction
  • · Replies 2 ·
Replies
2
Views
6K
Ray optics: velocity of image reflected off a moving mirror
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Yes, there is a typo. The correct electronic configuration for Yb+ is 4f146s.
  • · Replies 1 ·
Replies
1
Views
3K
Deconvolve absorption from this spectrometer signal
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What areas of nano/optical research applies to astrophysics?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Trouble Collecting IR Spectrum of a-Si:H
  • · Replies 5 ·
Replies
5
Views
3K
Graduate Cavity locking using Lockin+PID technique
  • · Replies 2 ·
Replies
2
Views
4K