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Title: Time-resolved ion imaging at free-electron lasers using TimepixCam

Abstract

In this paper, the application of a novel fast optical-imaging camera, TimepixCam, to molecular photoionization experiments using the velocity-map imaging technique at a free-electron laser is described. TimepixCam is a 256 × 256 pixel CMOS camera that is able to detect and time-stamp ion hits with 20 ns timing resolution, thus making it possible to record ion momentum images for all fragment ions simultaneously and avoiding the need to gate the detector on a single fragment. This allows the recording of significantly more data within a given amount of beam time and is particularly useful for pump–probe experiments, where drifts, for example, in the timing and pulse energy of the free-electron laser, severely limit the comparability of pump–probe scans for different fragments taken consecutively. Finally, in principle, this also allows ion–ion covariance or coincidence techniques to be applied to determine angular correlations between fragments.

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [5];  [6];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Princeton Univ., NJ (United States)
  2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); European X-ray Free-Electron Laser (XFEL), Hamburg (Germany)
  3. Kansas State Univ., Manhattan, KS (United States). J. R. Macdonald Lab. Dept. of Physics
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  5. CNRS Lab. of Physical Chemistry - Matter and Radiation (LCPMR), Paris (France)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Kansas State Univ., Manhattan, KS (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); BNL Laboratory Directed Research and Development (LDRD) Program; Helmholtz Association of German Research Centres
OSTI Identifier:
1430839
Report Number(s):
BNL-203364-2018-JAAM
Journal ID: ISSN 1600-5775; TRN: US1802624
Grant/Contract Number:  
SC0012704; FG02-86ER13491
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Synchrotron Radiation (Online)
Additional Journal Information:
Journal Name: Journal of Synchrotron Radiation (Online); Journal Volume: 25; Journal Issue: 2; Journal ID: ISSN 1600-5775
Publisher:
International Union of Crystallography
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; time-stamping camera; velocity map imaging; VMI; free-electron laser; FEL; ultrafast laser; pump-probe experiments; mass spectrometry

Citation Formats

Fisher-Levine, Merlin, Boll, Rebecca, Ziaee, Farzaneh, Bomme, Cedric, Erk, Benjamin, Rompotis, Dimitrios, Marchenko, Tatiana, Nomerotski, Andrei, and Rolles, Daniel. Time-resolved ion imaging at free-electron lasers using TimepixCam. United States: N. p., 2018. Web. doi:10.1107/S1600577517018306.
Fisher-Levine, Merlin, Boll, Rebecca, Ziaee, Farzaneh, Bomme, Cedric, Erk, Benjamin, Rompotis, Dimitrios, Marchenko, Tatiana, Nomerotski, Andrei, & Rolles, Daniel. Time-resolved ion imaging at free-electron lasers using TimepixCam. United States. doi:10.1107/S1600577517018306.
Fisher-Levine, Merlin, Boll, Rebecca, Ziaee, Farzaneh, Bomme, Cedric, Erk, Benjamin, Rompotis, Dimitrios, Marchenko, Tatiana, Nomerotski, Andrei, and Rolles, Daniel. Tue . "Time-resolved ion imaging at free-electron lasers using TimepixCam". United States. doi:10.1107/S1600577517018306. https://www.osti.gov/servlets/purl/1430839.
@article{osti_1430839,
title = {Time-resolved ion imaging at free-electron lasers using TimepixCam},
author = {Fisher-Levine, Merlin and Boll, Rebecca and Ziaee, Farzaneh and Bomme, Cedric and Erk, Benjamin and Rompotis, Dimitrios and Marchenko, Tatiana and Nomerotski, Andrei and Rolles, Daniel},
abstractNote = {In this paper, the application of a novel fast optical-imaging camera, TimepixCam, to molecular photoionization experiments using the velocity-map imaging technique at a free-electron laser is described. TimepixCam is a 256 × 256 pixel CMOS camera that is able to detect and time-stamp ion hits with 20 ns timing resolution, thus making it possible to record ion momentum images for all fragment ions simultaneously and avoiding the need to gate the detector on a single fragment. This allows the recording of significantly more data within a given amount of beam time and is particularly useful for pump–probe experiments, where drifts, for example, in the timing and pulse energy of the free-electron laser, severely limit the comparability of pump–probe scans for different fragments taken consecutively. Finally, in principle, this also allows ion–ion covariance or coincidence techniques to be applied to determine angular correlations between fragments.},
doi = {10.1107/S1600577517018306},
journal = {Journal of Synchrotron Radiation (Online)},
number = 2,
volume = 25,
place = {United States},
year = {2018},
month = {2}
}

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