An optical and terahertz instrumentation system at the FAST linac at Fermilab

Abstract

FAST is a facility at Fermilab that consists of a photoinjector, two superconducting capture cavities, one superconducting ILC-style cryomodule, and a small ring for studying non-linear, integrable beam optics called IOTA. This paper discusses the layout for the optical transport system that provides optical radiation to an externally located streak camera for bunch length measurements, and THz radiation to a Martin-Puplett interferometer, also for bunch length measurements. It accepts radiation from two synchrotron radiation ports in a chicane bunch compressor and a diffraction/transition radiation screen downstream of the compressor. It also has the potential to access signal from a transition radiation screen or YAG screen after the spectrometer magnet for measurements of energy-time correlations. Initial results from both the streak camera and Martin-Puplett will be presented.

arXiv comment5 pp

References in corpus (4)

• IOTA (Integrable Optics Test Accelerator): Facility and Experimental Beam Physics Program
• Vector electromagnetic theory of transition and diffraction radiation with application to the measurement of longitudinal bunch size
• Initial Demonstration Of 9-MHz Framing Camera Rates On The FAST Drive Laser Pulse Trains
• Initial observations of micropulse elongation of electron beams in a SCRF accelerator