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Title: Laser-Induced Linear-Field Particle Acceleration in Free Space

Linear-field particle acceleration in free space (which is distinct from geometries like the linac that requires components in the vicinity of the particle) has been studied for over 20 years, and its ability to eventually produce high-quality, high energy multi-particle bunches has remained a subject of great interest. Arguments can certainly be made that linear-field particle acceleration in free space is very doubtful given that first-order electron-photon interactions are forbidden in free space. Nevertheless, we chose to develop an accurate and truly predictive theoretical formalism to explore this remote possibility when intense, few-cycle electromagnetic pulses are used in a computational experiment. The formalism includes exact treatment of Maxwell’s equations and exact treatment of the interaction among the multiple individual particles at near and far field. Several surprising results emerge. We find that electrons interacting with intense laser pulses in free space are capable of gaining substantial amounts of energy that scale linearly with the feld amplitude. For example, 30keV electrons (2.5% energy spread) are accelerated to 61MeV (0.5% spread) and to 205MeV (0.25% spread) using 250 mJ and 2.5J lasers respectively. Furthermore, these findings carry important implications for our understanding of ultrafast electron-photon interactions in strong fields.
Authors:
 [1] ;  [2] ;  [3] ; ORCiD logo [4] ;  [5] ;  [2] ;  [2] ;  [6] ;  [7]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Singapore Institute of Manufacturing Technology, Innovis (Singapore)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  5. Northern Illinois Univ., DeKalb, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  6. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Hamburg Center for Ultrafast Imaging, Hamburg (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  7. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Technion-Israel Institute of Technology, Haifa (Israel)
Publication Date:
Report Number(s):
arXiv:1611.05697; FERMILAB-PUB-17-425-APC
Journal ID: ISSN 2045-2322; 1498611
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS
OSTI Identifier:
1398387

Wong, Liang Jie, Hong, Kyung -Han, Carbajo, Sergio, Fallahi, Arya, Piot, Philippe, Soljacic, Marin, Joannopoulos, John D., Kartner, Franz X., and Kaminer, Ido. Laser-Induced Linear-Field Particle Acceleration in Free Space. United States: N. p., Web. doi:10.1038/s41598-017-11547-9.
Wong, Liang Jie, Hong, Kyung -Han, Carbajo, Sergio, Fallahi, Arya, Piot, Philippe, Soljacic, Marin, Joannopoulos, John D., Kartner, Franz X., & Kaminer, Ido. Laser-Induced Linear-Field Particle Acceleration in Free Space. United States. doi:10.1038/s41598-017-11547-9.
Wong, Liang Jie, Hong, Kyung -Han, Carbajo, Sergio, Fallahi, Arya, Piot, Philippe, Soljacic, Marin, Joannopoulos, John D., Kartner, Franz X., and Kaminer, Ido. 2017. "Laser-Induced Linear-Field Particle Acceleration in Free Space". United States. doi:10.1038/s41598-017-11547-9. https://www.osti.gov/servlets/purl/1398387.
@article{osti_1398387,
title = {Laser-Induced Linear-Field Particle Acceleration in Free Space},
author = {Wong, Liang Jie and Hong, Kyung -Han and Carbajo, Sergio and Fallahi, Arya and Piot, Philippe and Soljacic, Marin and Joannopoulos, John D. and Kartner, Franz X. and Kaminer, Ido},
abstractNote = {Linear-field particle acceleration in free space (which is distinct from geometries like the linac that requires components in the vicinity of the particle) has been studied for over 20 years, and its ability to eventually produce high-quality, high energy multi-particle bunches has remained a subject of great interest. Arguments can certainly be made that linear-field particle acceleration in free space is very doubtful given that first-order electron-photon interactions are forbidden in free space. Nevertheless, we chose to develop an accurate and truly predictive theoretical formalism to explore this remote possibility when intense, few-cycle electromagnetic pulses are used in a computational experiment. The formalism includes exact treatment of Maxwell’s equations and exact treatment of the interaction among the multiple individual particles at near and far field. Several surprising results emerge. We find that electrons interacting with intense laser pulses in free space are capable of gaining substantial amounts of energy that scale linearly with the feld amplitude. For example, 30keV electrons (2.5% energy spread) are accelerated to 61MeV (0.5% spread) and to 205MeV (0.25% spread) using 250 mJ and 2.5J lasers respectively. Furthermore, these findings carry important implications for our understanding of ultrafast electron-photon interactions in strong fields.},
doi = {10.1038/s41598-017-11547-9},
journal = {Scientific Reports},
number = 1,
volume = 7,
place = {United States},
year = {2017},
month = {9}
}

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