Effects of internal target structures on laser-driven neutron production

Yihang Zhang, Wei-Min Wang, Yutong Li, Zhe Zhang, Paul McKenna, David Neely, Jie Zhang

Research output: Contribution to journalArticle

Abstract

We study neutron production in interactions of an intense laser pulse with solid, near-critical density and foam targets, by two-dimensional particle-in-cell simulations. We find that compared with solid and near-critical density targets, the neutron production from foam targets is more efficient because ion acceleration and ionion collisions are significantly enhanced. This is caused due to formation of ambipolar electrostatic fields among the multi-lamellas in the foam. The energy conversion efficiency from the laser pulse to the ions inside the foam target is up to 11%, 12- fold higher than the one achieved with a solid target for the same laser parameters. We also find that a foam target with thinner lamellas and larger pores between the lamellas is more favorable for neutron production due to higher laser energy absorption and longer distance for ion acceleration. The number of the neutrons can reach 107 from a foam target with a thickness of only 20 um driven by a 1020 W=cm2 laser pulse.
LanguageEnglish
Number of pages15
JournalNuclear Fusion
Publication statusAccepted/In press - 16 Apr 2019

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foams
neutrons
lamella
lasers
pulses
ions
energy conversion efficiency
energy absorption
porosity
collisions
electric fields
cells
simulation
interactions

Keywords

  • neutron sources
  • ion acceleration
  • foam targets
  • laser plasma interactions

Cite this

Zhang, Y., Wang, W-M., Li, Y., Zhang, Z., McKenna, P., Neely, D., & Zhang, J. (Accepted/In press). Effects of internal target structures on laser-driven neutron production. Nuclear Fusion.
Zhang, Yihang ; Wang, Wei-Min ; Li, Yutong ; Zhang, Zhe ; McKenna, Paul ; Neely, David ; Zhang, Jie. / Effects of internal target structures on laser-driven neutron production. In: Nuclear Fusion. 2019.
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Zhang, Y, Wang, W-M, Li, Y, Zhang, Z, McKenna, P, Neely, D & Zhang, J 2019, 'Effects of internal target structures on laser-driven neutron production' Nuclear Fusion.

Effects of internal target structures on laser-driven neutron production. / Zhang, Yihang; Wang, Wei-Min; Li, Yutong; Zhang, Zhe; McKenna, Paul; Neely, David; Zhang, Jie.

In: Nuclear Fusion, 16.04.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effects of internal target structures on laser-driven neutron production

AU - Zhang, Yihang

AU - Wang, Wei-Min

AU - Li, Yutong

AU - Zhang, Zhe

AU - McKenna, Paul

AU - Neely, David

AU - Zhang, Jie

PY - 2019/4/16

Y1 - 2019/4/16

N2 - We study neutron production in interactions of an intense laser pulse with solid, near-critical density and foam targets, by two-dimensional particle-in-cell simulations. We find that compared with solid and near-critical density targets, the neutron production from foam targets is more efficient because ion acceleration and ionion collisions are significantly enhanced. This is caused due to formation of ambipolar electrostatic fields among the multi-lamellas in the foam. The energy conversion efficiency from the laser pulse to the ions inside the foam target is up to 11%, 12- fold higher than the one achieved with a solid target for the same laser parameters. We also find that a foam target with thinner lamellas and larger pores between the lamellas is more favorable for neutron production due to higher laser energy absorption and longer distance for ion acceleration. The number of the neutrons can reach 107 from a foam target with a thickness of only 20 um driven by a 1020 W=cm2 laser pulse.

AB - We study neutron production in interactions of an intense laser pulse with solid, near-critical density and foam targets, by two-dimensional particle-in-cell simulations. We find that compared with solid and near-critical density targets, the neutron production from foam targets is more efficient because ion acceleration and ionion collisions are significantly enhanced. This is caused due to formation of ambipolar electrostatic fields among the multi-lamellas in the foam. The energy conversion efficiency from the laser pulse to the ions inside the foam target is up to 11%, 12- fold higher than the one achieved with a solid target for the same laser parameters. We also find that a foam target with thinner lamellas and larger pores between the lamellas is more favorable for neutron production due to higher laser energy absorption and longer distance for ion acceleration. The number of the neutrons can reach 107 from a foam target with a thickness of only 20 um driven by a 1020 W=cm2 laser pulse.

KW - neutron sources

KW - ion acceleration

KW - foam targets

KW - laser plasma interactions

UR - https://iopscience.iop.org/journal/0029-5515

M3 - Article

JO - Nuclear Fusion

T2 - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

ER -

Zhang Y, Wang W-M, Li Y, Zhang Z, McKenna P, Neely D et al. Effects of internal target structures on laser-driven neutron production. Nuclear Fusion. 2019 Apr 16.