Generation and Characterization of Superradiant Undulator Radiation

Technical Report · Tue Jul 01 00:00:00 EDT 1997

DOI:https://doi.org/10.2172/1454184· OSTI ID:1454184

Bocek, David ^[1]

---

1. SLAC National Accelerator Laboratory (SLAC), Stanford, CA (United States)

High-power, pulsed, coherent, far-infrared (FIR) radiation has many scientific applications, such as pump-probe studies of surfaces, liquids, and solids, studies of high-$$T_c$$ superconductors, biophysics, plasma diagnostics, and excitation of Rydberg atoms. Few sources of such FIR radiation currently exist. Superradiant undulator radiation produced at the SUNSHINE (Stanford UNiversity SHort INtense Electron-source) is such a FIR source. First proposed in the mm-wave spectral range by Motz, superradiant undulator radiation has been realized in the 45 μm to 300 μm spectral range by using sub-picosecond electron bunches produced by the SUNSHINE facility. The experimental setup and measurements of this FIR radiation are reported in this thesis. In addition to being a useful FIR source, the superradiant undulator radiation produced at SUNSHINE is an object of research in itself. Measured superlinear growth of the radiated energy along the undulator demonstrates the self-amplification of radiation by the electron bunch. This superlinear growth is seen at 47 μm to 70 μm wavelengths. These wavelengths are an order of magnitude shorter than in previous self-amplification demonstrations.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Stanford, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 1454184
• Report Number(s): SLAC-R--512; UC-414
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS