Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator
Abstract
The injection of electrons into a laser wakefield accelerator (LWFA) is observed to generate an intense coherent ultra-broadband and ultrashort pulse radiation flash, consistent with the acceleration of electrons from rest to nearly the speed of light in a distance <~1μm. Under certain conditions, the radiation occurs at harmonics of the local plasma frequency. The flash is sufficiently bright to induce large nonlinear refractive index shifts in optical materials; we estimate a source brightness temperature of ~1018K. We present measurements of the flash spectra, coherence, pulse duration, polarization, and angular distribution, providing a detailed picture of electron injection dynamics in LWFA. Furthermore, these are characteristic of laser-assisted injection of off-axis electrons, which preserves wake coherence.
- Authors:
-
- Univ. of Maryland, College Park, MD (United States)
- Publication Date:
- Research Org.:
- Univ. of Maryland, College Park, MD (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1612294
- Alternate Identifier(s):
- OSTI ID: 1478592
- Grant/Contract Number:
- SC0015516; DESC0015516
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review E
- Additional Journal Information:
- Journal Volume: 98; Journal Issue: 4; Journal ID: ISSN 2470-0045
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics; High intensity laser-plasma interactions
Citation Formats
Miao, B., Feder, L., Elle, J., Goers, A. J., Woodbury, D., Salehi, F., Wahlstrand, J. K., and Milchberg, H. M. Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator. United States: N. p., 2018.
Web. doi:10.1103/physreve.98.043206.
Miao, B., Feder, L., Elle, J., Goers, A. J., Woodbury, D., Salehi, F., Wahlstrand, J. K., & Milchberg, H. M. Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator. United States. https://doi.org/10.1103/physreve.98.043206
Miao, B., Feder, L., Elle, J., Goers, A. J., Woodbury, D., Salehi, F., Wahlstrand, J. K., and Milchberg, H. M. Tue .
"Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator". United States. https://doi.org/10.1103/physreve.98.043206. https://www.osti.gov/servlets/purl/1612294.
@article{osti_1612294,
title = {Coherent ultra-broadband laser-assisted injection radiation from a laser plasma accelerator},
author = {Miao, B. and Feder, L. and Elle, J. and Goers, A. J. and Woodbury, D. and Salehi, F. and Wahlstrand, J. K. and Milchberg, H. M.},
abstractNote = {The injection of electrons into a laser wakefield accelerator (LWFA) is observed to generate an intense coherent ultra-broadband and ultrashort pulse radiation flash, consistent with the acceleration of electrons from rest to nearly the speed of light in a distance <~1μm. Under certain conditions, the radiation occurs at harmonics of the local plasma frequency. The flash is sufficiently bright to induce large nonlinear refractive index shifts in optical materials; we estimate a source brightness temperature of ~1018K. We present measurements of the flash spectra, coherence, pulse duration, polarization, and angular distribution, providing a detailed picture of electron injection dynamics in LWFA. Furthermore, these are characteristic of laser-assisted injection of off-axis electrons, which preserves wake coherence.},
doi = {10.1103/physreve.98.043206},
journal = {Physical Review E},
number = 4,
volume = 98,
place = {United States},
year = {Tue Oct 23 00:00:00 EDT 2018},
month = {Tue Oct 23 00:00:00 EDT 2018}
}
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