TY  - JOUR
AU  - Mohammadi Bidhendi, Mahdi
AU  - Bermudez Macias, Ivette Jazmin
AU  - Ivanov, Rosen
AU  - Yurkov, Mikhail
AU  - Duesterer, Stefan
TI  - Characterization of free-electron laser third harmonic radiation at FLASH
JO  - Optics express
VL  - 33
IS  - 5
SN  - 1094-4087
CY  - Washington, DC
PB  - Optica
M1  - PUBDB-2024-07443
SP  - 10981 - 10996
PY  - 2025
AB  - The Free-electron LASer in Hamburg - FLASH - generates intense ultrashort pulses with femtosecond duration in the range of 3.3 − 90 nm in the fundamental. In addition, higher harmonic contributions are always present in the spectral distribution, extending this range to much shorter wavelengths. This study presents a detailed exploration of the evolution of the radiation properties of the third harmonic contribution in the self-amplified spontaneous emission (SASE) amplification process. Utilizing a terahertz streaking setup, we measured and analyzed the pulse durations and energies of the fundamental and third harmonic during the amplification process under various operational configurations and compared these with results from the 3D time-dependent free electron laser (FEL) simulation code FAST.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001446546000005
DO  - DOI:10.1364/OE.551587
UR  - https://bib-pubdb1.desy.de/record/619185
ER  -