Micro-bunching for generating tunable narrow-band THz radiation at the FAST photoinjector
| Autor: | Jayakar Thangaraj, J. Hyun, Tanaji Sen, Philippe Piot |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Accelerator Physics (physics.acc-ph)
Physics Nuclear and High Energy Physics 010308 nuclear & particles physics Terahertz radiation business.industry Wiggler FOS: Physical sciences Physics::Optics Electron 01 natural sciences Optics Transition radiation 0103 physical sciences Quadrupole Physics::Accelerator Physics Physics - Accelerator Physics Fermilab 010306 general physics business Chicane Instrumentation Beam (structure) |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 916:195-203 |
| ISSN: | 0168-9002 |
| Popis: | This paper presents expected THz radiation spectra emitted by micro-bunched electron beams produced using a slit-mask placed within a magnetic chicane in the FAST (Fermilab Accelerator Science and Technology) electron injector at Fermilab. Our purpose is to generate tunable narrow-band THz radiation with a simple scheme in a conventional photo-injector. Using the slit-mask in the chicane, we create a longitudinally micro-bunched beam after the chicane by transversely slicing an energy chirped electron bunch at a location with horizontal dispersion. In this paper, we discuss the theory related to the micro-bunched beam structure, the beam optics, the simulation results of the micro-bunched beam and the bunching factors. Energy radiated at THz frequencies from two sources: coherent transition radiation and from a wiggler is calculated and compared. We also discuss the results of a simple method to observe the micro-bunching on a transverse screen monitor using a skew quadrupole placed in the chicane. Comment: 25 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect