Effects of laser prepulse on proton generation: active manipulation of the distribution of laser accelerated proton beams

D. Batani, R. Redaelli, R. Dezulian, O. Lundh, F. Lindau, A. Persson, K. Osvay, C. G. Wahlström, D. C. Carroll, P. McKenna, S. Bandyopadhyay, D. Pepler, D. Neely, S. Kar, P. T. Simpson, K. Markey, M. Zepf, M. H. Xu, Y. T. Li

Research output: Contribution to journalConference Contribution

Abstract

Laser pre-pulse is a major issue in experiments on laser-generation of protons, often limiting the performances of laser sources. In this paper, we show how we can actively use a low intensity prepulse (<10 13W/cm2, ns duration) to manipulate the proton beam direction or spatial energy distribution. The prepulse is focused onto the front surface of a thin foil before the arrival of the high intensity pulse (≈1019W/cm2, ps duration). Under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, beam deviation increases with proton energy. The observations are discussed in terms of Target Normal Sheath Acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. Results obtained with an annular intensity distribution of the prepulse show smooth proton beams with a sharp circular boundary at all energies. Potential mechanisms to explain the observations are discussed.

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proton beams
manipulators
protons
lasers
pulses
deviation
aeroservoelasticity
proton energy
sheaths
arrivals
shock waves
foils
energy distribution
irradiation

Keywords

  • fast electrons
  • high-intensity lasers
  • proton beams
  • shock waves

Cite this

Batani, D. ; Redaelli, R. ; Dezulian, R. ; Lundh, O. ; Lindau, F. ; Persson, A. ; Osvay, K. ; Wahlström, C. G. ; Carroll, D. C. ; McKenna, P. ; Bandyopadhyay, S. ; Pepler, D. ; Neely, D. ; Kar, S. ; Simpson, P. T. ; Markey, K. ; Zepf, M. ; Xu, M. H. ; Li, Y. T. / Effects of laser prepulse on proton generation : active manipulation of the distribution of laser accelerated proton beams. In: AIP Conference Proceedings. 2008 ; Vol. 1024, No. 1. pp. 78-89.
@article{e4893dd7b97141809079a683f4c5798a,
title = "Effects of laser prepulse on proton generation: active manipulation of the distribution of laser accelerated proton beams",
abstract = "Laser pre-pulse is a major issue in experiments on laser-generation of protons, often limiting the performances of laser sources. In this paper, we show how we can actively use a low intensity prepulse (<10 13W/cm2, ns duration) to manipulate the proton beam direction or spatial energy distribution. The prepulse is focused onto the front surface of a thin foil before the arrival of the high intensity pulse (≈1019W/cm2, ps duration). Under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, beam deviation increases with proton energy. The observations are discussed in terms of Target Normal Sheath Acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. Results obtained with an annular intensity distribution of the prepulse show smooth proton beams with a sharp circular boundary at all energies. Potential mechanisms to explain the observations are discussed.",
keywords = "fast electrons, high-intensity lasers, proton beams, shock waves",
author = "D. Batani and R. Redaelli and R. Dezulian and O. Lundh and F. Lindau and A. Persson and K. Osvay and Wahlstr{\"o}m, {C. G.} and Carroll, {D. C.} and P. McKenna and S. Bandyopadhyay and D. Pepler and D. Neely and S. Kar and Simpson, {P. T.} and K. Markey and M. Zepf and Xu, {M. H.} and Li, {Y. T.}",
year = "2008",
month = "6",
day = "30",
doi = "10.1063/1.2958208",
language = "English",
volume = "1024",
pages = "78--89",
journal = "AIP Conference Proceedings",
issn = "0094-243X",
number = "1",

}

Batani, D, Redaelli, R, Dezulian, R, Lundh, O, Lindau, F, Persson, A, Osvay, K, Wahlström, CG, Carroll, DC, McKenna, P, Bandyopadhyay, S, Pepler, D, Neely, D, Kar, S, Simpson, PT, Markey, K, Zepf, M, Xu, MH & Li, YT 2008, 'Effects of laser prepulse on proton generation: active manipulation of the distribution of laser accelerated proton beams' AIP Conference Proceedings, vol. 1024, no. 1, pp. 78-89. https://doi.org/10.1063/1.2958208

Effects of laser prepulse on proton generation : active manipulation of the distribution of laser accelerated proton beams. / Batani, D.; Redaelli, R.; Dezulian, R.; Lundh, O.; Lindau, F.; Persson, A.; Osvay, K.; Wahlström, C. G.; Carroll, D. C.; McKenna, P.; Bandyopadhyay, S.; Pepler, D.; Neely, D.; Kar, S.; Simpson, P. T.; Markey, K.; Zepf, M.; Xu, M. H.; Li, Y. T.

In: AIP Conference Proceedings, Vol. 1024, No. 1, 30.06.2008, p. 78-89.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - Effects of laser prepulse on proton generation

T2 - AIP Conference Proceedings

AU - Batani, D.

AU - Redaelli, R.

AU - Dezulian, R.

AU - Lundh, O.

AU - Lindau, F.

AU - Persson, A.

AU - Osvay, K.

AU - Wahlström, C. G.

AU - Carroll, D. C.

AU - McKenna, P.

AU - Bandyopadhyay, S.

AU - Pepler, D.

AU - Neely, D.

AU - Kar, S.

AU - Simpson, P. T.

AU - Markey, K.

AU - Zepf, M.

AU - Xu, M. H.

AU - Li, Y. T.

PY - 2008/6/30

Y1 - 2008/6/30

N2 - Laser pre-pulse is a major issue in experiments on laser-generation of protons, often limiting the performances of laser sources. In this paper, we show how we can actively use a low intensity prepulse (<10 13W/cm2, ns duration) to manipulate the proton beam direction or spatial energy distribution. The prepulse is focused onto the front surface of a thin foil before the arrival of the high intensity pulse (≈1019W/cm2, ps duration). Under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, beam deviation increases with proton energy. The observations are discussed in terms of Target Normal Sheath Acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. Results obtained with an annular intensity distribution of the prepulse show smooth proton beams with a sharp circular boundary at all energies. Potential mechanisms to explain the observations are discussed.

AB - Laser pre-pulse is a major issue in experiments on laser-generation of protons, often limiting the performances of laser sources. In this paper, we show how we can actively use a low intensity prepulse (<10 13W/cm2, ns duration) to manipulate the proton beam direction or spatial energy distribution. The prepulse is focused onto the front surface of a thin foil before the arrival of the high intensity pulse (≈1019W/cm2, ps duration). Under oblique high-intensity irradiation and for low prepulse intensities, the proton beam is directed away from the target normal. Deviation is towards the laser forward direction, with an angle that increases with the level and duration of the ASE pedestal. Also, for a given laser pulse, beam deviation increases with proton energy. The observations are discussed in terms of Target Normal Sheath Acceleration, in combination with a laser-controllable shock wave locally deforming the target surface. Results obtained with an annular intensity distribution of the prepulse show smooth proton beams with a sharp circular boundary at all energies. Potential mechanisms to explain the observations are discussed.

KW - fast electrons

KW - high-intensity lasers

KW - proton beams

KW - shock waves

UR - http://www.scopus.com/inward/record.url?scp=49249120327&partnerID=8YFLogxK

UR - https://aip.scitation.org/journal/apc

U2 - 10.1063/1.2958208

DO - 10.1063/1.2958208

M3 - Conference Contribution

VL - 1024

SP - 78

EP - 89

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

SN - 0094-243X

IS - 1

ER -