Temporal characterization of ultrashort linearly chirped electron bunches generated from a laser wakefield accelerator

Zhang, C. J.; Hua, J. F.; Wan, Y.; Guo, B.; Pai, C. -H.; Wu, Y. P.; Li, F.; Chu, H. -H.; Gu, Y. Q.; Mori, W. B.; Joshi, C.; Wang, J.; Lu, W.

doi:10.1103/PhysRevAccelBeams.19.062802

Title: Temporal characterization of ultrashort linearly chirped electron bunches generated from a laser wakefield accelerator

Journal Article · Fri Jun 17 00:00:00 EDT 2016 · Physical Review Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevAccelBeams.19.062802· OSTI ID:1257668

Zhang, C. J.; Hua, J. F.; Wan, Y.; Guo, B.; Pai, C. -H.; Wu, Y. P.; Li, F.; Chu, H. -H.; Gu, Y. Q.; Mori, W. B.; Joshi, C.; Wang, J.; Lu, W.

A new method for diagnosing the temporal characteristics of ultrashort electron bunches with linear energy chirp generated from a laser wakefield accelerator is described. When the ionization-injected bunch interacts with the back of the drive laser, it is deflected and stretched along the direction of the electric field of the laser. Upon exiting the plasma, if the bunch goes through a narrow slit in front of the dipole magnet that disperses the electrons in the plane of the laser polarization, it can form a series of bunchlets that have different energies but are separated by half a laser wavelength. Since only the electrons that are undeflected by the laser go through the slit, the energy spectrum of the bunch is modulated. By analyzing the modulated energy spectrum, the shots where the bunch has a linear energy chirp can be recognized. Consequently, the energy chirp and beam current profile of those bunches can be reconstructed. Lastly, this method is demonstrated through particle-in-cell simulations and experiment.

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Research Organization:: Univ. of California, Los Angeles, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0008491; 2013CBA01501

OSTI ID:: 1257668

Alternate ID(s):: OSTI ID: 1299131

Journal Information:: Physical Review Accelerators and Beams, Journal Name: Physical Review Accelerators and Beams Vol. 19 Journal Issue: 6; ISSN 2469-9888

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 13 works

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References (24)

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