Optical diagnostics for density measurement in high-quality laser-plasma electron accelerators

Year: 2019

Authors: Brandi F., Gizzi LA

Autors Affiliation: Intense Laser Irradiation Laboratory (ILIL), Istituto Nazionale di Ottica – Consiglio Nazionale delle Ricerche (INO-CNR),Sede Secondaria di Pisa, Via Moruzzi, 1, 56124 Pisa, Italy;
Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pisa, Largo Bruno Pontecorvo, 3, 56127 Pisa, Italy

Abstract: Implementation of laser-plasma-based acceleration stages in user-oriented facilities requires the definition anddeployment of appropriate diagnostic methodologies to monitor and control the acceleration process. An overview isgiven here of optical diagnostics for density measurement in laser-plasma acceleration stages, with emphasis on well-established and easily implemented approaches. Diagnostics for both neutral gas and free-electron number densityare considered, highlighting real-time measurement capabilities. Optical interferometry, in its various configurations,from standard two-arm to more advanced common-path designs, is discussed, along with spectroscopic techniques suchas Stark broadening and Raman scattering. A critical analysis of the diagnostics presented is given concerning theirimplementation in laser-plasma acceleration stages for the production of high-quality GeV electron bunches.


Volume: 7      Pages from: e26-1  to: e26-11

More Information: This work received support from the European Unions Horizon 2020 research and innovation program under Grant Agreement No. 653782-EuPRAXIA, and the MIUR-funded Italian research Network ELI-Italy.
KeyWords: gas target; interferometry; laser-plasma; laser wake-field acceleration; Raman scattering; Stark broadening
DOI: 10.1017/hpl.2019.11

Citations: 15
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