Author: Potylitsyn, A.
Paper Title Page
TUPP36
 Experimental Investigation of Spectral-Angular Cherenkov Radiation Characteristics From 855 MeV Electrons  
 
  • A. Potylitsyn, S.Yu. Gogolev, A.V. Vukolov
    TPU, Tomsk, Russia
  • G. Kube, A.I. Novokshonov
    DESY, Hamburg, Germany
  • W. Lauth
    IKP, Mainz, Germany
  
  Radiation based beam diagnostics is a versatile tool, especially for transverse beam profile measurements. While the use of Optical Transition Radiation (OTR) has long history since developed, the application of Cherenkov Radiation (ChR) having comparatively higher intensity and tunable frequency spectrum just arouse interest. In order to investigate the ChR properties, an experiment has been carried out at the 855 MeV electron beam of the Mainz Microtron MAMI (University of Mainz, Germany). The beam size was 370 um in horizontal and 6.5 um in vertical direction. A 200 um thick fused silica was used as radiator. The beam images were recorded with a standard CMOS camera and an objective lens. While the detector was at a fixed observation angle (much larger than 46.77 degrees - the Cherenkov angle for a fused silica), the radiator could be rotated with respect to the beam direction such that the ChR angular distribution was measured as a function of the radiator orientation. In addition, a spectrometer was used to get the ChR emission spectrum orientation dependency. This report gives an overview of the experiment together with measurements and first theoretical comparisons.  
poster icon Poster TUPP36 [0.529 MB]  
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THPP05 Properties of Cherenkov Diffraction Radiation as Predicted by the Polarisation Currents Approach for Beam Instrumentation 218
 
  • D.M. Harryman, K.V. Fedorov, P. Karataev
    JAI, Egham, Surrey, United Kingdom
  • M. Bergamaschi, R. Kieffer, K. Łasocha, T. Lefèvre, S. Mazzoni
    CERN, Geneva, Switzerland
  • L. Bobb
    DLS, Oxfordshire, United Kingdom
  • A. Potylitsyn
    TPU, Tomsk, Russia
  • A. Schloegelhofer
    TU Vienna, Wien, Austria
  
  Cherenkov-Diffraction Radiation (ChDR) appears when a charged particle moves in the vicinity of a dielectric medium with velocity higher than the phase velocity of light inside the medium. As the charged particle does not contact the medium, the emission of ChDR is a phenomenon that can be exploited for a range of non-invasive beam diagnostics. Experimental tests are underway on the Booster To Storage-ring (BTS) test stand at Diamond Light Source to explore the use of dielectric radiators as Beam Position Monitor (BPM) pickups by measuring the incoherent ChDR emission. In order to compliment the experiments on the BTS test stand, ChDR simulations have been performed using the Polarisation Currents Approach (PCA) model. This paper explores the PCA simulations for the BTS test stand, and the application for future diagnostics.  
poster icon Poster THPP05 [1.204 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2020-THPP05  
About • paper received ※ 10 September 2020       paper accepted ※ 14 September 2020       issue date ※ 30 October 2020  
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