scholarly journals IR spectroscopy of protonated leu-enkephalin and its 18-crown-6 complex embedded in helium droplets

2015 ◽  
Vol 17 (34) ◽  
pp. 21902-21911 ◽  
Author(s):  
Ana Isabel González Flórez ◽  
Doo-Sik Ahn ◽  
Sandy Gewinner ◽  
Wieland Schöllkopf ◽  
Gert von Helden
Keyword(s):  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Superfluid Helium ◽  
Free Electron ◽  
Free Electron Laser ◽  
Radiation Source ◽  
Helium Droplets

Ultracold IR spectra of protonated leu-enkephalin and its 18-crown-6 complex embedded in superfluid helium droplets have been recorded using a free-electron laser as radiation source.

Design of a synchrotron radiation source at Tohoku University

1998 ◽  
Vol 5 (3) ◽  
pp. 339-341 ◽  
Author(s):  
Masahiro Katoh ◽  
Shigeru Sato ◽  
Shoji Suzuki ◽  
Masumi Sugawara ◽  
Makoto Watanabe
Keyword(s):  
Synchrotron Radiation ◽  
Light Source ◽  
Free Electron ◽  
Present Status ◽  
Free Electron Laser ◽  
Radiation Source ◽  
Beam Energy ◽  
Synchrotron Radiation Source ◽  
Third Generation

The construction of a third-generation light source has been proposed at Tohoku University. The emittance is 7.3 nm rad at the nominal beam energy, 1.5 GeV. The circumference is 194 m. The ring consists of 12 double-bend achromatic cells. Ten of 12 dispersion-free long straight sections are 5 m long and will be used for insertion devices and some accelerator components. The remaining two are each 15 m long and reserved for advanced devices, such as a very long undulator or a free-electron laser. A stretcher–booster ring, which is now under commission, will be used as an injector. In total, about 50 beamlines can be constructed and ten of them will be those of insertion devices. The present status of the project is `waiting for approval'.

scholarly journals Hybrid (Oscillator-Amplifier) Free Electron Laser and New Proposals

2021 ◽  
Vol 11 (13) ◽  
pp. 5948
Author(s):  
Andrea Doria
Keyword(s):  
Electric Field ◽  
Free Electron ◽  
Free Electron Laser ◽  
Radiation Source ◽  
Far Infrared ◽  
Infrared Region ◽  
Transverse Magnetic ◽  
Radiation Emission ◽  
Magnetic Undulator ◽  
Strong Radiation

The present work analyses a hybrid free electron laser (FEL) scheme where the oscillator is based on a radiation source operating with a slow-wave guiding structure as, for instance, a Cerenkov FEL or a Smith–Purcell FEL. Such devices, often running in transverse magnetic (TM) modes, present a longitudinal electric field which can easily affect the longitudinal electrons’ velocities, inducing an energy modulation on the beam. Such a modulation, properly controlled, can induce a strong radiation emission in a magnetic undulator properly designed to operate as a radiator. General considerations will be exposed together with a practical numerical example in the far infrared region of the spectrum.

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