• A.Y. Murokh, M. Ruelas, R. Tikhoplav
  RadiaBeam, Santa Monica
• D.M. Gassner, E. Pozdeyev
  BNL, Upton, Long Island, New York

For high average current electron accelerators, such as Energy Recovery Linacs (ERL), the characterization of basic electron beam properties requires non-interceptive diagnostics. One promising non-destructive approach for a high average current beam diagnostic is the laser wire scanner (LWS). RadiaBeam Technologies is developing an inexpensive, stand-alone laser wire scanner system specifically adapted to ERL parameters. The proposed system utilizes distinctive features of ERL beams, such as a relatively long bunch length and ultra-high repetition rate, to maximize photon count while using off the shelf laser technology. The RadiaBeam LWS prototype presently under development will be installed and commissioned at the Brookhaven National Laboratory (BNL) ERL facility. This system's design and projected performance are discussed herein.

• G. Andonian, A.Y. Murokh, A.G. Ovodenko, M. Ruelas, R. Tikhoplav
  RadiaBeam, Marina del Rey
• D. Dooley
  Spectrum Detector, Lake Oswego, Oregon
• U. Happek
  UGA, Athens, Georgia
• S. Reiche
  PSI, Villigen

This paper reports on the progress of the development of a bunch length diagnostic for high brightness beams. The diagnostic, termed the real time interferometer, is a single shot, autocorrelator that outputs the interferogram of coherent radiation emitted from compressed, high-brightness beams. The device uses all-reflective terahertz optics as well as a highly sensitive pyroelectric-based detector array. For initial testing, coherent transition radiation is used, however, the diagnostic can be used in a non-destructive manner if coherent edge or synchrotron radiation is employed. Current research includes diagnostic design and preliminary tests conducted at the BNL Accelerator Test Facility.