Single-shot measurement of the spectral envelope of broad-bandwidth terahertz pulses from femtosecond electron bunches
We present a new approach (demonstrated experimentally and through modeling) to characterize the spectral envelope of a terahertz (THz) pulse in a single shot. The coherent THz pulse is produced by a femtosecond electron bunch and contains information on the bunch duration. The technique, involving a single low-power laser probe pulse, is an extension of the conventional spectral encoding method (limited in time resolution to hundreds of femtoseconds) into a regime only limited in resolution by the laser pulse length (tens of femtoseconds). While only the bunch duration is retrieved (and not the exact charge profile), such a measurement provides a useful and critical parameter for optimization of the electron accelerator.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- Accelerator& Fusion Research Division
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 1032524
- Report Number(s):
- LBNL-4878E; OPLEDP; TRN: US1200524
- Journal Information:
- Optics Letters, Vol. 33, Issue 11; Related Information: Journal Publication Date: 2008; ISSN 0146-9592
- Country of Publication:
- United States
- Language:
- English
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