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26 April 2024 |
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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
; | | Date: |
17 Oct 2003 | | Journal: | Phys Rev Lett, 91 (16), 164801 | | Abstract: | We have developed a polarimetry of ultrashort pulse gamma rays based on the fact that gamma rays penetrating in the forward direction through a magnetized iron carry information on the helicity of the original gamma rays. Polarized, short-pulse gamma rays of (1.1+/-0.2)x10(6)/bunch 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 gamma rays was conducted using longitudinally magnetized iron of 15 cm length. It is found that the gamma-ray intensity is in good agreement with the simulated value of 1.0x10(6). Varying the degree of laser polarization, the asymmetry for 100% laser polarization was derived to be (1.29+/-0.12)%, which is also consistent with the expected value of 1.3%. | | Source: | PubMed, pmid14611407 | | Services: | Forum | Review | Favorites | |
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