1. Plasma density measurement by means of self-modulation of long electron bunches.
- Author
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G Loisch, G Asova, P Boonpornprasert, Y Chen, J Good, M Gross, H Huck, D Kalantaryan, M Krasilnikov, O Lishilin, D Melkumyan, A Oppelt, H Qian, Y Renier, F Stephan, and Q Zhao
- Subjects
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PLASMA density , *PARTICLE beam bunching , *ELECTRON plasma , *RELATIVISTIC particles , *ELECTRON density , *PHASE space - Abstract
We present a new method to determine the electron density of a plasma by measuring the periodicity of modulations introduced to the longitudinal phase space of a relativistic particle bunch by the interaction with the plasma via the self-modulation instability. As the modulation is solely depending on the plasma density and the beam parameters, this method allows to determine the time-resolved density of a plasma at the position of beam passage, which is confirmed in particle-in-cell simulations. Densities in the range of 3.6 × 1012 cm−3 – 7.2 × 1015 cm−3 have been measured and the measurement accuracy is confirmed by comparison to spectroscopic plasma density measurements. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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