Towards coherent control of SASE pulses using propagation through helium gas at wavelengths corresponding to double excitation

Using the third harmonic of the FEL radiation from the SPring-8 compact SASE (self-amplified stimulated emission) source SCSS we have studied the effects on SASE pulses with central wavelengths near 20 nm due to passage through a helium gas cell. The positions of zero ionization cross-section close...

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Published inJournal of physics. B, Atomic, molecular, and optical physics Vol. 46; no. 16; pp. 164021 - 1-5
Main Authors Harries, James R, Nagasono, Mitsuru, Iwayama, Hiroshi, Shigemasa, Eiji
Format Journal Article
LanguageEnglish
Published IOP Publishing 28.08.2013
Subjects
Coherence
Cross sections (physics)
Excitation
free electron laser
Helium
Ionization
Stimulated emission
Wave propagation
Wavelengths
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Summary:Using the third harmonic of the FEL radiation from the SPring-8 compact SASE (self-amplified stimulated emission) source SCSS we have studied the effects on SASE pulses with central wavelengths near 20 nm due to passage through a helium gas cell. The positions of zero ionization cross-section close to wavelengths corresponding to double-excitations allow operation as an efficient wavelength filter, with effectively 100% transmitted peak intensity until the Doppler-broadening limit is reached. We discuss how the time profile of the SASE pulses is affected, and discuss potential applications.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0953-4075
1361-6455
DOI:10.1088/0953-4075/46/16/164021