• T.J. Maxwell, P. Piot
  Northern Illinois University, DeKalb, Illinois
• T.J. Maxwell
  Fermilab, Batavia

Funding: Supported by U.S. Department of Energy, under Contract DE-FG02-06ER41435 with Northern Illinois University and by the Fermi Research Alliance, LLC under Contract DE-AC02-07CH11359 with the U.S. D.O.E.

Designs for developing TeV-range electron-positron linear colliders include a non-zero crossing angle colliding scheme at the interaction point to mitigate instabilities and possible background. Maximizing the luminosity when operating with non-zero crossing angles requires the use of "crab" cavities to impart a well-defined spatio-temporal correlation. In this paper we propose a novel non-interceptive diagnostic capable of measuring and monitoring the spatio-temporal correlation, i.e. the transverse position of sub-picosecond time slices, within bunch. An analysis of the proposed scheme, its spatio-temporal resolution and its limitations are quantified. Finally, the design of a proof-of-principle experiment in preparation for the Fermilab's A0 photoinjector is presented.

• P. Piot, A. Bracke, V. Demir, T.J. Maxwell, M.M. Rihaoui
  Northern Illinois University, DeKalb, Illinois
• C.-J. Jing
  Euclid TechLabs, LLC, Solon, Ohio
• J.G. Power
  ANL, Argonne

Funding: This work is supported by the U.S. Department of Energy under contract no. DE-FG02-06ER41435 with Northern Illinois University.

We present a diagnostics suite and analyze techniques for setting up the longitudinal beam dynamics in ILC e^- injectors and e⁺ and e^- bunch compressors. Techniques to measure the first order moments and recover the first order longitudinal transfer map of the injector's intricate bunching scheme are presented. Coherent transition radiation diagnostics needed to measure and monitor the bunch length downstream of the ~5 GeV bunch compressor are investigated using a vector diffraction model.