Journal
SCIENTIFIC REPORTS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41598-022-13684-2
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Funding
- Frontier Photonic Sciences Project of National Institutes of Natural Sciences [01211906]
- JSPS KAKENHI [20H00164, 21K03430, 22H02044]
- Quantum Beam Technology Program of MEXT/JST
- Grants-in-Aid for Scientific Research [21K03430, 20H00164] Funding Source: KAKEN
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This study verifies that spontaneous radiation wave packets generated by tandem undulators have a double-pulsed temporal profile, which can be controlled at the attosecond level.
We verify that each wave packet of spontaneous radiation from two undulators placed in series has a double-pulsed temporal profile with pulse spacing which can be controlled at the attosecond level. Using a Mach-Zehnder interferometer operating at ultraviolet wavelengths, we obtain the autocorrelation trace for the spontaneous radiation from the tandem undulator. The results clearly show that the wave packet has a double-pulsed structure, consisting of a pair of 10-cycle oscillations with a variable separation. We also report the characterization of the time delay between the double-pulsed components in different wavelength regimes. The excellent agreement between the independent measurements confirms that a tandem undulator can be used to produce double-pulsed wave packets at arbitrary wavelength.
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