PRESENT AND PERSPECTIVES OF THE SPARC THz SOURCE
2011
The development of radiation sources in the Terahertz
(THz) spectral region has become more and more interesting
because of the peculiar characteristics of this radiation:
it is non ionizing, it penetrates dielectrics, it is
highly absorbed by polar liquids, highly reflected by metals
and reveals specific “fingerprint”absorption spectra arising
from fundamentals physical processes. The THz source at
SPARC is a linac-based source for both longitudinal beam
diagnostics and research investigations. Its measured peak
power is of the order of 108 W, very competitive with respect
to other present sources. The status of the THz radiation
source, in particular its generation and properties, is
presented and future perspectives are discussed
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