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

D Gwynne, S. Kar, D. Doria, H. Ahmed, M. Cerchez, J. Fernandez, Ross Gray, J. Green, F Hanton, David MacLellan, Paul McKenna, Z. Najmudin, David Neely, J.A. Ruiz, A. Schiavi, M. J. V. Streeter, O. Willi, M. Zepf, M. Borghesi

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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.
Original languageEnglish
Article number033304
Number of pages6
JournalReview of Scientific Instruments
Volume85
Issue number3
DOIs
Publication statusPublished - Mar 2014

Keywords

  • electical fields
  • magnetic fields
  • magnetic field sensors
  • ion spectrometer
  • ion sources

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