scholarly journals A helium nanodroplet setup for mid and far-infrared spectroscopy using pulsed-free-electron lasers: vibrational spectra of propargyl alcohol

RSC Advances ◽  
2017 ◽  
Vol 7 (86) ◽  
pp. 54318-54325 ◽  
Author(s):  
Devendra Mani ◽  
Theo Fischer ◽  
Raffael Schwan ◽  
Arghya Dey ◽  
Britta Redlich ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Free Electron ◽  
Free Electron Laser ◽  
Low Frequency ◽  
Far Infrared ◽  
Molecular Clusters ◽  
Free Electron Lasers ◽  
Far Infrared Spectroscopy ◽  
Molecular Motions ◽  
Helium Nanodroplets

Helium nanodroplets spectroscopy in combination with free electron laser. The combination is suitable for studying molecular clusters in 66–3600 cm−1 spectral range, covering the important low-frequency large amplitude intra and inter-molecular motions.

Main-signal filamentation in free-electron lasers with deeply trapped particles

1990 ◽  
Vol 44 (1) ◽  
pp. 33-45 ◽  
Author(s):  
F. B. Rizzato
Keyword(s):  
Electric Fields ◽  
Free Electron ◽  
Free Electron Laser ◽  
Electromagnetic Waves ◽  
Transverse Electric ◽  
Low Frequency ◽  
Fast Wave ◽  
Free Electron Lasers ◽  
Trapped Particles ◽  
Transverse Electric Fields

The filamentation of electromagnetic waves in a free-electron laser with deeply trapped electrons is analysed. This instability is the result of particle bunching along transverse directions (with respect to the fast wave vector), as opposed to the untrapped-electron case, where it is a result of longitudinal bunching. Two cases are considered: (i) the non-resonant or reactive one, with purely imaginary growth rates; and (ii) the resonant one, with large (small) values of the real (imaginary) part of the perturbing frequency. In particular, we find that the reactive instability occurs only when the wiggler amplitude is unusually large. On the other hand, we show that the resonant process (with frequencies close to the synchrotron frequency) may be relevant for conventional free-electron lasers and that the growth rate for quasi-trans verse perturbations may be larger than that corresponding to longitudinal perturbations. Owing to the inhomogeneity and anisotropy of our system, low-frequency magnetic fields are generated. These fields, as well as the transverse electric fields, are analysed, and their role in the low-frequency dynamics is clarified.

FAR INFRARED FREE ELECTRON LASER

1983 ◽  
Vol 44 (C1) ◽  
pp. C1-385-C1-385
Author(s):  
E. D. Shaw ◽  
R. M. Emanuelson ◽  
G. A. Herbster
Keyword(s):  
Free Electron ◽  
Free Electron Laser ◽  
Far Infrared

scholarly journals Synchrotron-Based High Resolution Far-Infrared Spectroscopy of trans-Butadiene

2020 ◽  
Vol 124 (12) ◽  
pp. 2427-2435 ◽  
Author(s):  
Marie-Aline Martin-Drumel ◽  
Jessica P. Porterfield ◽  
Manuel Goubet ◽  
Pierre Asselin ◽  
Robert Georges ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Far Infrared ◽  
Far Infrared Spectroscopy

Infrared spectroscopy of neutral clusters based on a vacuum ultraviolet free electron laser

2021 ◽  
Vol 34 (1) ◽  
pp. 51-60
Author(s):  
Gang Li ◽  
Chong Wang ◽  
Hui-jun Zheng ◽  
Tian-tong Wang ◽  
Hua Xie ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Free Electron ◽  
Free Electron Laser ◽  
Vacuum Ultraviolet
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