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Rev Sci Instrum. 2014 Mar;85(3):033304. doi: 10.1063/1.4866021.

Modified Thomson spectrometer design for high energy, multi-species ion sources.

Author information

  • 1Centre for Plasma Physics, School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, United Kingdom.
  • 2Institut für Laser-und Plasmaphysik, Heinrich-Heine-Universität, Düsseldorf, Germany.
  • 3Instituto de Fusión Nuclear UPM, Jose Gutierrez Abascal 2, E28006 Madrid, Spain.
  • 4Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG, United Kingdom.
  • 5Central Laser Facility, Rutherford Appleton Laboratory, Didcot, Oxfordshire OX11 0QX, United Kingdom.
  • 6Blackett Laboratory, Imperial College, London SW7 2AZ, United Kingdom.
  • 7Dipartimento SBAI, Università di Roma "La Sapienza," 00161 Rome, Italy.

Abstract

A modification to the standard Thomson parabola spectrometer is discussed, which is designed to measure high energy (tens of MeV/nucleon), broad bandwidth spectra of multi-species ions accelerated by intense laser plasma interactions. It is proposed to implement a pair of extended, trapezoidal shaped electric plates, which will not only resolve ion traces at high energies, but will also retain the lower energy part of the spectrum. While a longer (along the axis of the undeflected ion beam direction) electric plate design provides effective charge state separation at the high energy end of the spectrum, the proposed new trapezoidal shape will enable the low energy ions to reach the detector, which would have been clipped or blocked by simply extending the rectangular plates to enhance the electrostatic deflection.

PMID:
24689572
[PubMed - in process]
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