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Measuring electron-positron annihilation radiation from laser plasma interactions.

Chen, H, Tommasini, R, Seely, J, Szabo, CI, Feldman, U, Pereira, N, Gregori, G, Falk, K, Mithen, J and Murphy, CD (2012) Measuring electron-positron annihilation radiation from laser plasma interactions. Rev Sci Instrum, 83 (10).

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Abstract

We investigated various diagnostic techniques to measure the 511 keV annihilation radiations. These include step-wedge filters, transmission crystal spectroscopy, single-hit CCD detectors, and streaked scintillating detection. While none of the diagnostics recorded conclusive results, the step-wedge filter that is sensitive to the energy range between 100 keV and 700 keV shows a signal around 500 keV that is clearly departing from a pure Bremsstrahlung spectrum and that we ascribe to annihilation radiation.

Item Type: Article
Authors :
NameEmailORCID
Chen, HUNSPECIFIEDUNSPECIFIED
Tommasini, RUNSPECIFIEDUNSPECIFIED
Seely, JUNSPECIFIEDUNSPECIFIED
Szabo, CIUNSPECIFIEDUNSPECIFIED
Feldman, UUNSPECIFIEDUNSPECIFIED
Pereira, NUNSPECIFIEDUNSPECIFIED
Gregori, GUNSPECIFIEDUNSPECIFIED
Falk, KUNSPECIFIEDUNSPECIFIED
Mithen, Jj.mithen@surrey.ac.ukUNSPECIFIED
Murphy, CDUNSPECIFIEDUNSPECIFIED
Date : October 2012
Identification Number : 10.1063/1.4734038
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:36
Last Modified : 17 May 2017 12:36
URI: http://epubs.surrey.ac.uk/id/eprint/835987

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