Generation of tens-of-MeV photons by Compton backscatter from laser-plasma-accelerated GeV electrons

J. M. Shaw*, A. C. Bernstein, A. Hannasch, M. Laberge, Y. Y. Chang, K. Weichman, J. Welch, R. Zgadzaj, W. Henderson, H. E. Tsai, N. Fazel, X. Wang, C. Wagner, M. Donovan, G. Dyer, E. Gaul, J. Gordon, M. Martinez, M. Spinks, T. ToncianT. Ditmire, M. C. Downer

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review


Previous work has demonstrated the use of a plasma mirror (PM), after a laser-plasma accelerator (LPA), for generating Compton γ-rays by retro-reflecting the spent laser pulse into the just-accelerated electrons. Here, we investigate the use of a PM to stimulate Compton backscatter (CBS) by retro-reflecting a spent pulse from the Texas Petawatt (TPW) laser after it has driven a cm-scale, GeV LPA. A comparative analysis between the electron and CBS pointing and divergence reveals strong agreement, from shot-to-shot, suggesting a reliable, non-invasive extension for GeV-beam metrology. Our observations confirm the self-aligning PM method is scalable to GeV LPAs, while also suggesting a technique with unique advantages and a robustness that can potentially be exploited for investigations of nonlinear Compton backscatter from ultralow divergence, GeV electrons using the Texas Petawatt Laser.

Original languageEnglish
Title of host publicationAdvanced Accelerator Concepts
Subtitle of host publication17th Advanced Accelerator Concepts Workshop, AAC 2016
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735414808
Publication statusPublished - 6 Mar 2017
Event17th Advanced Accelerator Concepts Workshop, AAC 2016 - National Harbor, United States
Duration: 31 Jul 20165 Aug 2016


Conference17th Advanced Accelerator Concepts Workshop, AAC 2016
Country/TerritoryUnited States
CityNational Harbor

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