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Title: Laser wakefield acceleration with active feedback at 5 Hz

Abstract

We describe the use of a genetic algorithm to apply active feedback to a laser wakefield accelerator at a higher power (10 TW) and a lower repetition rate (5 Hz) than previous work. The temporal shape of the drive laser pulse was adjusted automatically to optimize the properties of the electron beam. By changing the software configuration, different properties could be improved. This included the total accelerated charge per bunch, which was doubled, and the average electron energy, which was increased from 22 to 27 MeV. Using experimental measurements directly to provide feedback allows the system to work even when the underlying acceleration mechanisms are not fully understood, and, in fact, studying the optimized pulse shape might reveal new insights into the physical processes responsible. Our work suggests that this technique, which has already been applied with low-power lasers, can be extended to work with petawatt-class laser systems.

Authors:
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Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC); Science and Technology Facilities Council (STFC); European Network for Novel Accelerators; Newton-Bhabha; Helmholtz Accelerator Initiative; Atomic Weapons Establishment; National Science Foundation (NSF)
OSTI Identifier:
1509521
Alternate Identifier(s):
OSTI ID: 1612685
Grant/Contract Number:  
SC0016804; ST/J002062/1; 1535628
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 4; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 43 PARTICLE ACCELERATORS; Physics

Citation Formats

Dann, S. J. D., Baird, C. D., Bourgeois, N., Chekhlov, O., Eardley, S., Gregory, C. D., Gruse, J. -N., Hah, J., Hazra, D., Hawkes, S. J., Hooker, C. J., Krushelnick, K., Mangles, S. P. D., Marshall, V. A., Murphy, C. D., Najmudin, Z., Nees, J. A., Osterhoff, J., Parry, B., Pourmoussavi, P., Rahul, S. V., Rajeev, P. P., Rozario, S., Scott, J. D. E., Smith, R. A., Springate, E., Tang, Y., Tata, S., Thomas, A. G. R., Thornton, C., Symes, D. R., and Streeter, M. J. V. Laser wakefield acceleration with active feedback at 5 Hz. United States: N. p., 2019. Web. doi:10.1103/PhysRevAccelBeams.22.041303.
Dann, S. J. D., Baird, C. D., Bourgeois, N., Chekhlov, O., Eardley, S., Gregory, C. D., Gruse, J. -N., Hah, J., Hazra, D., Hawkes, S. J., Hooker, C. J., Krushelnick, K., Mangles, S. P. D., Marshall, V. A., Murphy, C. D., Najmudin, Z., Nees, J. A., Osterhoff, J., Parry, B., Pourmoussavi, P., Rahul, S. V., Rajeev, P. P., Rozario, S., Scott, J. D. E., Smith, R. A., Springate, E., Tang, Y., Tata, S., Thomas, A. G. R., Thornton, C., Symes, D. R., & Streeter, M. J. V. Laser wakefield acceleration with active feedback at 5 Hz. United States. doi:10.1103/PhysRevAccelBeams.22.041303.
Dann, S. J. D., Baird, C. D., Bourgeois, N., Chekhlov, O., Eardley, S., Gregory, C. D., Gruse, J. -N., Hah, J., Hazra, D., Hawkes, S. J., Hooker, C. J., Krushelnick, K., Mangles, S. P. D., Marshall, V. A., Murphy, C. D., Najmudin, Z., Nees, J. A., Osterhoff, J., Parry, B., Pourmoussavi, P., Rahul, S. V., Rajeev, P. P., Rozario, S., Scott, J. D. E., Smith, R. A., Springate, E., Tang, Y., Tata, S., Thomas, A. G. R., Thornton, C., Symes, D. R., and Streeter, M. J. V. Fri . "Laser wakefield acceleration with active feedback at 5 Hz". United States. doi:10.1103/PhysRevAccelBeams.22.041303.
@article{osti_1509521,
title = {Laser wakefield acceleration with active feedback at 5 Hz},
author = {Dann, S. J. D. and Baird, C. D. and Bourgeois, N. and Chekhlov, O. and Eardley, S. and Gregory, C. D. and Gruse, J. -N. and Hah, J. and Hazra, D. and Hawkes, S. J. and Hooker, C. J. and Krushelnick, K. and Mangles, S. P. D. and Marshall, V. A. and Murphy, C. D. and Najmudin, Z. and Nees, J. A. and Osterhoff, J. and Parry, B. and Pourmoussavi, P. and Rahul, S. V. and Rajeev, P. P. and Rozario, S. and Scott, J. D. E. and Smith, R. A. and Springate, E. and Tang, Y. and Tata, S. and Thomas, A. G. R. and Thornton, C. and Symes, D. R. and Streeter, M. J. V.},
abstractNote = {We describe the use of a genetic algorithm to apply active feedback to a laser wakefield accelerator at a higher power (10 TW) and a lower repetition rate (5 Hz) than previous work. The temporal shape of the drive laser pulse was adjusted automatically to optimize the properties of the electron beam. By changing the software configuration, different properties could be improved. This included the total accelerated charge per bunch, which was doubled, and the average electron energy, which was increased from 22 to 27 MeV. Using experimental measurements directly to provide feedback allows the system to work even when the underlying acceleration mechanisms are not fully understood, and, in fact, studying the optimized pulse shape might reveal new insights into the physical processes responsible. Our work suggests that this technique, which has already been applied with low-power lasers, can be extended to work with petawatt-class laser systems.},
doi = {10.1103/PhysRevAccelBeams.22.041303},
journal = {Physical Review Accelerators and Beams},
number = 4,
volume = 22,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.22.041303

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    Works referencing / citing this record:

    Laser wakefield acceleration with active feedback at 5 Hz
    text, January 2019

    • Dann, S. J. D.; Baird, C. D.; Bourgeois, N.
    • Deutsches Elektronen-Synchrotron, DESY, Hamburg
    • DOI: 10.3204/pubdb-2019-04796