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

A. Alejo, S. Kar, A. Tebartz, H. Ahmed, S. Astbury, D. C. Carroll, J. Ding, D. Doria, A. Higginson, P. McKenna, N. Neumann, G. G. Scott, F. Wagner, M. Roth, M. Borghesi

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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.
Original languageEnglish
Article number083304
Number of pages5
JournalReview of Scientific Instruments
Volume87
Issue number8
DOIs
Publication statusPublished - 17 Aug 2016

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    High Resolution Thomson Parabola Spectrometer for Full Spectral Capture of Multi-Species Ion Beams

    Alejo, A. (Contributor), Kar, S. (Creator), Tebartz, A. (Contributor), Ahmed, H. (Contributor), Astbury, S. (Contributor), D.C., C. (Contributor), Ding, J. (Contributor), Doria, D. (Contributor), Higginson, A. (Contributor), McKenna, P. (Contributor), Neumann, N. (Contributor), Scott, G. (Contributor), Wagner, F. (Contributor), Roth, M. (Contributor) & Borghesi, M. (Contributor), Queen's University Belfast, 2016

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    Alejo, A., Kar, S., Tebartz, A., Ahmed, H., Astbury, S., Carroll, D. C., Ding, J., Doria, D., Higginson, A., McKenna, P., Neumann, N., Scott, G. G., Wagner, F., Roth, M., & Borghesi, M. (2016). High resolution Thomson Parabola Spectrometer for full spectral capture of multi-species ion beams. Review of Scientific Instruments, 87(8), [083304]. https://doi.org/10.1063/1.4961028