Magnetic collimation of relativistic positrons and electrons from high intensity laser-matter interactions

Hui Chen, G. Fiksel, D. Barnak, Po-Yu Chang, R. F. Heeter, A. Link, D. D. Meyerhofer

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Collimation of positrons produced by laser-solid interactions has been observed using an externally applied axial magnetic field. The collimation leads to a narrow divergence positron beam, with an equivalent full width at half maximum beam divergence angle of 4° vs the un-collimated divergence of about 20°. A fraction of the laser-produced relativistic electrons with energies close to those of the positrons is collimated, so the charge imbalance ratio (ne-/ne+) in the co-propagating collimated electron-positron jet is reduced from ∼100 (no collimation) to ∼2.5 (with collimation). The positron density in the collimated beam increased from 5×107cm-3 to 1.9×109cm -3, measured at the 0.6m from the source. This is a significant step towards the grand challenge of making a charge neutral electron-positron pair plasma jet in the laboratory.

Original languageEnglish
Article number040703
JournalPhysics of Plasmas
Volume21
Issue number4
DOIs
Publication statusPublished - 2014

Fingerprint

collimation
high power lasers
positrons
divergence
electrons
interactions
electron-positron pairs
plasma jets
lasers
magnetic fields
energy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Chen, Hui ; Fiksel, G. ; Barnak, D. ; Chang, Po-Yu ; Heeter, R. F. ; Link, A. ; Meyerhofer, D. D. / Magnetic collimation of relativistic positrons and electrons from high intensity laser-matter interactions. In: Physics of Plasmas. 2014 ; Vol. 21, No. 4.
@article{6fdc934d459343039be3f20b721eca10,
title = "Magnetic collimation of relativistic positrons and electrons from high intensity laser-matter interactions",
abstract = "Collimation of positrons produced by laser-solid interactions has been observed using an externally applied axial magnetic field. The collimation leads to a narrow divergence positron beam, with an equivalent full width at half maximum beam divergence angle of 4° vs the un-collimated divergence of about 20°. A fraction of the laser-produced relativistic electrons with energies close to those of the positrons is collimated, so the charge imbalance ratio (ne-/ne+) in the co-propagating collimated electron-positron jet is reduced from ∼100 (no collimation) to ∼2.5 (with collimation). The positron density in the collimated beam increased from 5×107cm-3 to 1.9×109cm -3, measured at the 0.6m from the source. This is a significant step towards the grand challenge of making a charge neutral electron-positron pair plasma jet in the laboratory.",
author = "Hui Chen and G. Fiksel and D. Barnak and Po-Yu Chang and Heeter, {R. F.} and A. Link and Meyerhofer, {D. D.}",
year = "2014",
doi = "10.1063/1.4873711",
language = "English",
volume = "21",
journal = "Physics of Plasmas",
issn = "1070-664X",
publisher = "American Institute of Physics Publising LLC",
number = "4",

}

Magnetic collimation of relativistic positrons and electrons from high intensity laser-matter interactions. / Chen, Hui; Fiksel, G.; Barnak, D.; Chang, Po-Yu; Heeter, R. F.; Link, A.; Meyerhofer, D. D.

In: Physics of Plasmas, Vol. 21, No. 4, 040703, 2014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Magnetic collimation of relativistic positrons and electrons from high intensity laser-matter interactions

AU - Chen, Hui

AU - Fiksel, G.

AU - Barnak, D.

AU - Chang, Po-Yu

AU - Heeter, R. F.

AU - Link, A.

AU - Meyerhofer, D. D.

PY - 2014

Y1 - 2014

N2 - Collimation of positrons produced by laser-solid interactions has been observed using an externally applied axial magnetic field. The collimation leads to a narrow divergence positron beam, with an equivalent full width at half maximum beam divergence angle of 4° vs the un-collimated divergence of about 20°. A fraction of the laser-produced relativistic electrons with energies close to those of the positrons is collimated, so the charge imbalance ratio (ne-/ne+) in the co-propagating collimated electron-positron jet is reduced from ∼100 (no collimation) to ∼2.5 (with collimation). The positron density in the collimated beam increased from 5×107cm-3 to 1.9×109cm -3, measured at the 0.6m from the source. This is a significant step towards the grand challenge of making a charge neutral electron-positron pair plasma jet in the laboratory.

AB - Collimation of positrons produced by laser-solid interactions has been observed using an externally applied axial magnetic field. The collimation leads to a narrow divergence positron beam, with an equivalent full width at half maximum beam divergence angle of 4° vs the un-collimated divergence of about 20°. A fraction of the laser-produced relativistic electrons with energies close to those of the positrons is collimated, so the charge imbalance ratio (ne-/ne+) in the co-propagating collimated electron-positron jet is reduced from ∼100 (no collimation) to ∼2.5 (with collimation). The positron density in the collimated beam increased from 5×107cm-3 to 1.9×109cm -3, measured at the 0.6m from the source. This is a significant step towards the grand challenge of making a charge neutral electron-positron pair plasma jet in the laboratory.

UR - http://www.scopus.com/inward/record.url?scp=84899525518&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84899525518&partnerID=8YFLogxK

U2 - 10.1063/1.4873711

DO - 10.1063/1.4873711

M3 - Article

AN - SCOPUS:84899525518

VL - 21

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1070-664X

IS - 4

M1 - 040703

ER -