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Relativistic quasimonoenergetic positron jets from intense laser-solid interactions.

Chen, H, Wilks, SC, Meyerhofer, DD, Bonlie, J, Chen, CD, Chen, SN, Courtois, C, Elberson, L, Gregori, G, Kruer, W, Landoas, O, Mithen, J, Myatt, J, Murphy, CD, Nilson, P, Price, D, Schneider, M, Shepherd, R, Stoeckl, C, Tabak, M, Tommasini, R and Beiersdorfer, P (2010) Relativistic quasimonoenergetic positron jets from intense laser-solid interactions. Phys Rev Lett, 105 (1).

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Abstract

Detailed angle and energy resolved measurements of positrons ejected from the back of a gold target that was irradiated with an intense picosecond duration laser pulse reveal that the positrons are ejected in a collimated relativistic jet. The laser-positron energy conversion efficiency is ∼2×10{-4}. The jets have ∼20 degree angular divergence and the energy distributions are quasimonoenergetic with energy of 4 to 20 MeV and a beam temperature of ∼1  MeV. The sheath electric field on the surface of the target is shown to determine the positron energy. The positron angular and energy distribution is controlled by varying the sheath field, through the laser conditions and target geometry.

Item Type: Article
Authors :
NameEmailORCID
Chen, HUNSPECIFIEDUNSPECIFIED
Wilks, SCUNSPECIFIEDUNSPECIFIED
Meyerhofer, DDUNSPECIFIEDUNSPECIFIED
Bonlie, JUNSPECIFIEDUNSPECIFIED
Chen, CDUNSPECIFIEDUNSPECIFIED
Chen, SNUNSPECIFIEDUNSPECIFIED
Courtois, CUNSPECIFIEDUNSPECIFIED
Elberson, LUNSPECIFIEDUNSPECIFIED
Gregori, GUNSPECIFIEDUNSPECIFIED
Kruer, WUNSPECIFIEDUNSPECIFIED
Landoas, OUNSPECIFIEDUNSPECIFIED
Mithen, Jj.mithen@surrey.ac.ukUNSPECIFIED
Myatt, JUNSPECIFIEDUNSPECIFIED
Murphy, CDUNSPECIFIEDUNSPECIFIED
Nilson, PUNSPECIFIEDUNSPECIFIED
Price, DUNSPECIFIEDUNSPECIFIED
Schneider, MUNSPECIFIEDUNSPECIFIED
Shepherd, RUNSPECIFIEDUNSPECIFIED
Stoeckl, CUNSPECIFIEDUNSPECIFIED
Tabak, MUNSPECIFIEDUNSPECIFIED
Tommasini, RUNSPECIFIEDUNSPECIFIED
Beiersdorfer, PUNSPECIFIEDUNSPECIFIED
Date : 2 July 2010
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:27
Last Modified : 17 May 2017 12:27
URI: http://epubs.surrey.ac.uk/id/eprint/835433

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