A co-axial velocity map imaging spectrometer for electrons

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

doi:10.1063/1.5046192

AIP Advances (Nov 2018)

A co-axial velocity map imaging spectrometer for electrons

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

Affiliations

S. Li: Department of Physics, Stanford University, Stanford, California 94305, USA
E. G. Champenois: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
R. Coffee: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
Z. Guo: Department of Applied Physics, Stanford University, Stanford, California 94305, USA
K. Hegazy: Department of Physics, Stanford University, Stanford, California 94305, USA
A. Kamalov: Department of Physics, Stanford University, Stanford, California 94305, USA
A. Natan: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
J. O’Neal: Department of Physics, Stanford University, Stanford, California 94305, USA
T. Osipov: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
M. Owens III
D. Ray: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
D. Rich: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
P. Walter: Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
A. Marinelli: SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
J. P. Cryan: Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA

DOI: https://doi.org/10.1063/1.5046192
Journal volume & issue: Vol. 8, no. 11
pp. 115308 – 115308-11

Abstract

Read online

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.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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