Polarimetry of short-pulse gamma rays produced through inverse compton scattering of circularly polarized laser beams

M. Fukuda, T. Aoki, K. Dobashi, T. Hirose, T. Iimura, Y. Kurihara, T. Okugi, T. Omori, I. Sakai, J. Urakawa, M. Washio

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Abstract

We have developed a polarimetry of ultrashort pulse [Formula presented] rays based on the fact that [Formula presented] rays penetrating in the forward direction through a magnetized iron carry information on the helicity of the original [Formula presented] rays. Polarized, short-pulse [Formula presented] rays of [Formula presented] with a time duration of 31 ps and a maximum energy of 55.9 MeV were produced via Compton scattering of a circularly polarized laser beam of 532 nm off an electron beam of 1.28 GeV. The first demonstration of asymmetry measurements of short-pulse [Formula presented] rays was conducted using longitudinally magnetized iron of 15 cm length. It is found that the [Formula presented]-ray intensity is in good agreement with the simulated value of [Formula presented]. Varying the degree of laser polarization, the asymmetry for 100% laser polarization was derived to be [Formula presented], which is also consistent with the expected value of 1.3%.

Original languageEnglish
JournalPhysical Review Letters
Volume91
Issue number16
DOIs
Publication statusPublished - 2003 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Fukuda, M., Aoki, T., Dobashi, K., Hirose, T., Iimura, T., Kurihara, Y., Okugi, T., Omori, T., Sakai, I., Urakawa, J., & Washio, M. (2003). Polarimetry of short-pulse gamma rays produced through inverse compton scattering of circularly polarized laser beams. Physical Review Letters, 91(16). https://doi.org/10.1103/PhysRevLett.91.164801