A co-axial velocity map imaging spectrometer for electrons
oleh: S. Li, E. G. Champenois, R. Coffee, Z. Guo, K. Hegazy, A. Kamalov, A. Natan, J. O’Neal, T. Osipov, M. Owens III, D. Ray, D. Rich, P. Walter, A. Marinelli, J. P. Cryan
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2018-11-01 |
Deskripsi
We present the design of an electron velocity map imaging (VMI) spectrometer where the ionizing laser source propagates along the symmetry axis of the spectrometer. The co-axial geometry is useful in a variety of experiments, because it provides a unique 2-dimensional projection of the 3-dimensional electron momentum distribution. Initial simulations show that this co-axial VMI can work with both high energy (more than 100 eV) and low energy (tens of eV) electrons. We demonstrate the performance of this co-axial VMI spectrometer at the Linac Coherent Light Source X-ray Free Electron Laser facility.