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Journal Articles

Plasma wakefield acceleration for ultrahigh-energy cosmic rays

Chen, P.*; Tajima, Toshiki; Takahashi, Yoshiyuki*

Physical Review Letters, 89(16), p.161101_1 - 161101_4, 2002/10

 Times Cited Count:91 Percentile:92.03(Physics, Multidisciplinary)

A cosmic acceleration mechanism is introduced which is based on the wakefields excited by the Alfven shocks in a relativistically flowing plasma,where the energy gain per distance of a test particle is Lorentz invariant. We show that there exists a threshold condition for transparency below which the accelerating particle is collision-free and suffers little energy loss in the plasma medium. The stochastic encounters of the random accelerating-decelerating phases results in a power-law energy spectrum: 1/E$$^{2}$$. The environment suitable for such plasma wakefield acceleration can be cosmically abundant. As an example, we discuss the possible production of super-GZK ultra high energy cosmic rays ( UHECR ) through this mechanism in the atmosphere of gamma ray bursts. We show that the acceleration gradient can be as high as 10$$^{16}$$eV/cm. The estimated event rate in our model agrees with that from UHECR observations.

JAEA Reports

Intercomparison of measuring and evaluation methods for environmental radiations

Saito, Kimiaki; Nagaoka, Toshi; Sakamoto, Ryuichi; Tsutsumi, Masahiro; Moriuchi, Shigeru; *

JAERI-M 90-188, 40 Pages, 1990/11

JAERI-M-90-188.pdf:1.18MB

no abstracts in English

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