Phys. Rev. Lett. 102, 105001 (2009) [4 pages]Relativistic Positron Creation Using Ultraintense Short Pulse Lasers
See accompanying Physics Focus We measure up to 2×1010 positrons per steradian ejected out the back of ∼mm thick gold targets when illuminated with short (∼1 ps) ultraintense (∼1×1020 W/cm2) laser pulses. Positrons are produced predominately by the Bethe-Heitler process and have an effective temperature of 2–4 MeV, with the distribution peaking at 4–7 MeV. The angular distribution of the positrons is anisotropic. Modeling based on the measurements indicate the positron density to be ∼1016 positrons/cm3, the highest ever created in the laboratory. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.105001
DOI:
10.1103/PhysRevLett.102.105001
PACS:
52.38.Ph, 52.59.−f
See AlsoComment: D. B. Cassidy and A. P. Mills, Jr., Comment on “Relativistic Positron Creation Using Ultraintense Short Pulse Lasers”, Phys. Rev. Lett. 103, 179501 (2009). |
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