Observation of coherent synchrotron radiation from the NSLS VUV ring

Abstract

We report the observation of multiparticle coherent emission in the very far infrared from bunched electrons in an electron storage ring. The emission occurs in quasi-periodic bursts, and only when the electron beam current exceeds a threshold value, suggesting an instability-driven modulation of the electron bunch density. For the operating conditions reported, the spectral content of the coherent emission is peaked near a wavelength of 7 mm. This wavelength is much shorter than the nominal electron bunch length, indicating the presence of a density modulation within the bunch. # 2001 Published by Elsevier Science B.V.

Facing the challenge of biosample imaging by FTIR with a synchrotron radiation source

“…However, as recently pointed out by Carr et al (2001) and Dumas et al (2004), the concept of spatial resolution in IR imaging (discussed in the next section) is not an independent parameter and its definition is associated with the contrast level in the image. In other words, the spatial resolution of an IR image is diffractionlimited; it is affected by the optical design (e.g.…”

“…In particular, the available spatial resolution previously limited by the brilliance becomes diffraction-limited, a condition associated with apertures defining a region comparable with or smaller than the wavelength of the light (Carr et al, 2001;Dumas et al, 2004).…”

Infrared and Terahertz Spectroscopy of Strongly Correlated Electron Systems under Extreme Conditions

“…The obtained CSR has 10 4 times the intensity of ''normal'' (incoherent) SR. The generation of CSR from a storage ring has been investigated at several SR facilities, [202][203][204][205] particularly using a laser-slicing method. [206][207][208] Quasi-monochromatic CSR was also obtained owing to the periodic modulation of electron bunches created by an amplitude-modulated laser pulse at UVSOR-II.…”

High-resolution infrared spectroscopy with synchrotron sources

“…In order to observe CSR, short electron bunches and/or long wavelengths are required, so it is evident that the THz or very far-IR region is of primary interest. A full survey of CSR is outside the scope of the present paper, but an overview can be obtained from the following publications and references therein [94][95][96][97][98][99]. From our high-resolution perspective, it is interesting that a relatively early observation of CSR was made using the IR beamline at MAX-lab [94].…”