Generation of incoherent Cherenkov diffraction radiation in synchrotrons

R Kieffer,L Bartnik,A S Konkov,M Billing,J Shanks,S Wang,V V Bleko,M Bergamaschi,J Conway,R O Jones,J S Markova,P Karataev,L Bobb,Y Padilla Fuentes,T Lefevre,A P Potylitsyn,S Mazzoni,M Forster

doi:10.1103/physrevaccelbeams.23.042803

R Kieffer, L Bartnik + Show 16 more

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https://doi.org/10.1103/physrevaccelbeams.23.042803

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Incoherent Cherenkov diffraction radiation was recently produced in the Cornell electron storage ring using counterpropagating beams (electrons and positrons) passing in the close vicinity of a dielectric made of fused silica. We present in this paper a collection of the experimental investigations that were performed on Cherenkov diffraction radiation in both the infrared and the visible range. Measurements were performed using an optical system functioning either in imaging conditions or in far field conditions to retrieve the angular distribution of the radiation. Polarization studies were also performed and showed that, when selecting the appropriate polarization, the beam size can be measured accurately. This study opens the path for new applications in noninvasive beam diagnostic for highly relativistic charged particle beams.

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Since its discovery in the mid 1930s, the usage of Cherenkov radiation (ChR) [1] has widely spread as a technique to detect charged particles in many different fields such as nuclear [2] and particle [3] physics or astrophysics [4]
Incoherent Cherenkov diffraction radiation was recently produced in the Cornell electron storage ring using counterpropagating beams passing in the close vicinity of a dielectric made of fused silica
We present in this paper a collection of the experimental investigations that were performed on Cherenkov diffraction radiation in both the infrared and the visible range

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Introduction

Since its discovery in the mid 1930s, the usage of Cherenkov radiation (ChR) [1] has widely spread as a technique to detect charged particles in many different fields such as nuclear [2] and particle [3] physics or astrophysics [4]. A first experiment was performed to investigate the possibility of noninvasive beam diagnostic techniques based on the detection of incoherent Cherenkov diffraction radiation (ChDR) [5]. The latter refers to the emission of Cherenkov radiation by charged particles traveling not inside, but in the vicinity of, a dielectric material. This combines the already well-known advantages of Cherenkov radiation with noninvasive photon generation, making it an ideal technique for beam instrumentation.

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