Magnetic Drift Separator For Study Of Electron-Positron Pair Production In Laser Produced Plasma

V V Apollonov; V N Belvaev; Yu L Kalachev; S I Moshkunov; A M Prokhorov; A G Suzdaltsev; V I Temnikov

doi:10.1117/12.938711

21 October 1986 Magnetic Drift Separator For Study Of Electron-Positron Pair Production In Laser Produced Plasma

V V Apollonov, V N Belvaev, Yu L Kalachev, S I Moshkunov, A M Prokhorov, A G Suzdaltsev, V I Temnikov

Proceedings Volume 0664, High Intensity Laser Processes; (1986) https://doi.org/10.1117/12.938711
Event: 1986 Quebec Symposium, 1986, Quebec City, Canada

Abstract

Due to a progress in development of high power pulsed lasers the laboratory available intensities of electromagnetic wave reaching about IO¹⁸ W/cm² for neodymium and about IO¹⁶W/cm² for CO₂-lasers. This provides a possibility of experimental study of some effects in strong electromagnetic field. The interesting one is the electron-positron pair production by electromagnetic wave. Here a theory predicts two possibilities:(1) direct vacuum pair production /1,2/ and (2) indirect pair production in plasma by relativistic electrons, accelerated in electromagnetic field /3,4/. The calculations of the probability of vacuum pair production /I,2/ indicates that production of a detectable number of pair from this process will require the intensities (of the order of IO³⁰W/cm²) that many orders of magnitude greater than the contemporary lasers provide. The later effect, however, is expected to require only quite realistic intensity. In this paper we discuss the possibility of experimental observation of the pair production in plasma by electrons accelerated by focused laser beam, and suggest the simple method allowing for a small number of positron to detect in the presence of strong background from laser plasma.

Citation Download Citation

V V Apollonov, V N Belvaev, Yu L Kalachev, S I Moshkunov, A M Prokhorov, A G Suzdaltsev, and V I Temnikov "Magnetic Drift Separator For Study Of Electron-Positron Pair Production In Laser Produced Plasma", Proc. SPIE 0664, High Intensity Laser Processes, (21 October 1986); https://doi.org/10.1117/12.938711

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