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Title: High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams

Abstract

We report on the experimental characterisation of laser-driven ion beams using a Thomson Parabola Spectrometer (TPS) equipped with trapezoidally shaped electric plates, proposed by Gwynne et al. [Rev. Sci. Instrum. 85, 033304 (2014)]. While a pair of extended (30 cm long) electric plates was able to produce a significant increase in the separation between neighbouring ion species at high energies, deploying a trapezoidal design circumvented the spectral clipping at the low energy end of the ion spectra. The shape of the electric plate was chosen carefully considering, for the given spectrometer configuration, the range of detectable ion energies and species. Analytical tracing of the ion parabolas matches closely with the experimental data, which suggests a minimal effect of fringe fields on the escaping ions close to the wedged edge of the electrode. The analytical formulae were derived considering the relativistic correction required for the high energy ions to be characterised using such spectrometer.

Authors:
; ; ; ;  [1]; ; ;  [2]; ; ;  [3]; ;  [4];  [5];  [6]
  1. Centre for Plasma Physics, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN (United Kingdom)
  2. Institut für Kernphysik, Technische Universität Darmstadt, Schloßgartenstrasse 9, D-64289 Darmstadt (Germany)
  3. Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX (United Kingdom)
  4. Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom)
  5. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt (Germany)
  6. Institut für Kernphysik, Technische Universität Darmstadt, Schloßgartenstraße 9, D-64289 Darmstadt (Germany)
Publication Date:
OSTI Identifier:
22597678
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 8; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CAPTURE; CONFIGURATION; DESIGN; ELECTRODES; ION BEAMS; IONS; LASERS; PARABOLAS; PLATES; RELATIVISTIC RANGE; RESOLUTION; SPECTRA; SPECTROMETERS

Citation Formats

Alejo, A., Kar, S., E-mail: s.kar@qub.ac.uk, Ahmed, H., Doria, D., Borghesi, M., Tebartz, A., Ding, J., Neumann, N., Astbury, S., Carroll, D. C., Scott, G. G., Higginson, A., McKenna, P., Wagner, F., and Roth, M. High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams. United States: N. p., 2016. Web. doi:10.1063/1.4961028.
Alejo, A., Kar, S., E-mail: s.kar@qub.ac.uk, Ahmed, H., Doria, D., Borghesi, M., Tebartz, A., Ding, J., Neumann, N., Astbury, S., Carroll, D. C., Scott, G. G., Higginson, A., McKenna, P., Wagner, F., & Roth, M. High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams. United States. doi:10.1063/1.4961028.
Alejo, A., Kar, S., E-mail: s.kar@qub.ac.uk, Ahmed, H., Doria, D., Borghesi, M., Tebartz, A., Ding, J., Neumann, N., Astbury, S., Carroll, D. C., Scott, G. G., Higginson, A., McKenna, P., Wagner, F., and Roth, M. Mon . "High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams". United States. doi:10.1063/1.4961028.
@article{osti_22597678,
title = {High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams},
author = {Alejo, A. and Kar, S., E-mail: s.kar@qub.ac.uk and Ahmed, H. and Doria, D. and Borghesi, M. and Tebartz, A. and Ding, J. and Neumann, N. and Astbury, S. and Carroll, D. C. and Scott, G. G. and Higginson, A. and McKenna, P. and Wagner, F. and Roth, M.},
abstractNote = {We report on the experimental characterisation of laser-driven ion beams using a Thomson Parabola Spectrometer (TPS) equipped with trapezoidally shaped electric plates, proposed by Gwynne et al. [Rev. Sci. Instrum. 85, 033304 (2014)]. While a pair of extended (30 cm long) electric plates was able to produce a significant increase in the separation between neighbouring ion species at high energies, deploying a trapezoidal design circumvented the spectral clipping at the low energy end of the ion spectra. The shape of the electric plate was chosen carefully considering, for the given spectrometer configuration, the range of detectable ion energies and species. Analytical tracing of the ion parabolas matches closely with the experimental data, which suggests a minimal effect of fringe fields on the escaping ions close to the wedged edge of the electrode. The analytical formulae were derived considering the relativistic correction required for the high energy ions to be characterised using such spectrometer.},
doi = {10.1063/1.4961028},
journal = {Review of Scientific Instruments},
number = 8,
volume = 87,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}