Two-stage laser acceleration of high quality protons using a tailored density plasma
Abstract
A new scheme for a laser-driven proton accelerator based on a sharply tailored near-critical-density plasma target is proposed. The designed plasma profile allows for the laser channeling of the dense plasma, which triggers a two-stage acceleration of protons—first accelerated by the laser acting as a snowplow in plasma, and then by the collisionless shock launched from the sharp density downramp. Thanks to laser channeling in the near-critical plasma, the formed shock is radially small and collimated. This allows it to generate a significant space-charge field, which acts as a monochromator, defocusing the lower energy protons while the highest ones remain collimated. Our theoretical and numerical analysis demonstrates production of high-energy proton beams with few tens of percent energy spread, few degrees divergence angle and charge up to few nC. With a PW-class ultrashort laser this scheme predicts the generation of such high quality proton beams with energies up to several hundreds of MeV.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1493510
- Alternate Identifier(s):
- OSTI ID: 1544122
- Grant/Contract Number:
- NA0003842
- 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: 2; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Wan, Y., Andriyash, I. A., Hua, J. F., Pai, C. -H., Lu, W., Mori, W. B., Joshi, C., and Malka, V. Two-stage laser acceleration of high quality protons using a tailored density plasma. United States: N. p., 2019.
Web. doi:10.1103/PhysRevAccelBeams.22.021301.
Wan, Y., Andriyash, I. A., Hua, J. F., Pai, C. -H., Lu, W., Mori, W. B., Joshi, C., & Malka, V. Two-stage laser acceleration of high quality protons using a tailored density plasma. United States. https://doi.org/10.1103/PhysRevAccelBeams.22.021301
Wan, Y., Andriyash, I. A., Hua, J. F., Pai, C. -H., Lu, W., Mori, W. B., Joshi, C., and Malka, V. Tue .
"Two-stage laser acceleration of high quality protons using a tailored density plasma". United States. https://doi.org/10.1103/PhysRevAccelBeams.22.021301.
@article{osti_1493510,
title = {Two-stage laser acceleration of high quality protons using a tailored density plasma},
author = {Wan, Y. and Andriyash, I. A. and Hua, J. F. and Pai, C. -H. and Lu, W. and Mori, W. B. and Joshi, C. and Malka, V.},
abstractNote = {A new scheme for a laser-driven proton accelerator based on a sharply tailored near-critical-density plasma target is proposed. The designed plasma profile allows for the laser channeling of the dense plasma, which triggers a two-stage acceleration of protons—first accelerated by the laser acting as a snowplow in plasma, and then by the collisionless shock launched from the sharp density downramp. Thanks to laser channeling in the near-critical plasma, the formed shock is radially small and collimated. This allows it to generate a significant space-charge field, which acts as a monochromator, defocusing the lower energy protons while the highest ones remain collimated. Our theoretical and numerical analysis demonstrates production of high-energy proton beams with few tens of percent energy spread, few degrees divergence angle and charge up to few nC. With a PW-class ultrashort laser this scheme predicts the generation of such high quality proton beams with energies up to several hundreds of MeV.},
doi = {10.1103/PhysRevAccelBeams.22.021301},
journal = {Physical Review Accelerators and Beams},
number = 2,
volume = 22,
place = {United States},
year = {Tue Feb 05 00:00:00 EST 2019},
month = {Tue Feb 05 00:00:00 EST 2019}
}
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https://doi.org/10.1103/PhysRevAccelBeams.22.021301
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