Author: Thomas, C.A.
Paper Title Page
TUPC160 Recent Developments of Diagnostics at Diamond 1407
 
  • G. Rehm, C. Bloomer, A.F.D. Morgan, C.A. Thomas
    Diamond, Oxfordshire, United Kingdom
 
  This contribution summarizes some recent development of diagnostics system to improve the operation of Diamond Light Source. Firstly, we are advancing the integration of photon beam diagnostics with the orbit feedback system. Measurements have shown the correlation between recorded electron and photon beam motion on the short timescales (ms-minutes) and the potential for improvement on long timescales (minutes-days). Secondly, with the addition of more elliptically polarized undulators at Diamond, measurement of their photon beam position require a solution that reliably operates with the changing photon beam profiles emitted by these devices. To this end, we have developed an X-ray beam position monitor that analyzes the backscatter from an aperture in the front end. Thirdly, as operation in low-alpha mode with few ps bunch lengths receives increasing interest from users, we have been evaluating various techniques for the measurement of these short bunch lengths that could serve as alternatives to streak camera measurements.  
 
THPC068 CSR and THz Emission Measurements at the Diamond Light Source 3050
 
  • R. Bartolini, G. Cinque, G. Rehm, C.A. Thomas
    Diamond, Oxfordshire, United Kingdom
  • I.P.S. Martin
    JAI, Oxford, United Kingdom
 
  After the successful implementation of the low alpha optics at Diamond we have started a characterisation of coherent THz emission with the aim of classifying the rich phenomenology of stable and bursting emission and to devise the best operational mode for potential THz users. In conjunction with the Diamond IR beamline B22, THz spectral data were acquired simultaneously with Schottky diode signals in the mm-wave region of the spectrum. We also report the results of comparison with numerical simulations made with the aim of reproducing the measured THz emission spectra and gaining further understanding on the mechanisms of the instability.