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Single Shot Bunch Length Monitoring,
Based on Interferometer and Novel Terahertz Sensor--RadiaBeam Technologies, LLC,
Dr. Gerard Andonian,
Principal Investigator, andonian@radiabeam.com
Mr. Salime Boucher, Business Official, boucher@radiabeam.com
DOE Grant No. DE‑FG02‑07ER84814
Amount:
$749,571
With the recent development of advanced photoinjector
accelerators and next generation light sources, the progression towards
high-current, ultra-short beams are very important. The knowledge of the
longitudinal profile and bunch length of the short pulses is necessary for
performance optimization and benchmarking to computational models. Thus, in order to achieve successful beam
operation, it will be essential to measure these short pulses in a single-shot,
in real time, and with sub-picosecond time resolution.
This project will develop a real-time
bunch-length interferometer utilizing a novel beam autocorrelation technique. In this approach, the interference of the beam
with itself takes place on the plane of a terahertz detector array; the spatial
interference is correlated to the horizontal position along the array. Phase I consisted of theoretical calculations
and modeling of coherent radiation sources typical of accelerator facilities,
and the design of an interferometer scheme efficient in the terahertz regime. Laboratory testing and a detector survey also
were conducted.
Commercial Applications and
Other Benefits as described by the awardee:
The
real-time interferometer would be of great use to the
accelerator community. In addition, the
real time interferometer could be incorporated into a feedback loop to lock the
bunch length of the beam, thus guaranteeing consistent parameter sets for Free
Electron Laser, Compton Scattering, and collider facilities. Finally, the technology should have numerous
applications in the growing field of terahertz radiation creation and imaging.