Topic
Synchrotron radiation
About: Synchrotron radiation is a research topic. Over the lifetime, 14639 publications have been published within this topic receiving 244775 citations. The topic is also known as: magnetobremsstrahlung radiation & Synchrotron Radiation.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a systematic study of the minimum detection limits obtainable with synchrotron radiation continuum excitation has been made for thin samples of 10 elements distributed across the periodic table.
Abstract: A systematic study of the minimum detection limits obtainable with synchrotron radiation continuum excitation has been made for thin samples of 10 elements distributed across the periodic table. Energy dispersion and wavelength dispersion measurements are included; the results show that both techniques achieve comparable values, ranging from 10/sup -3/ to 10/sup -1/ /sup +/g/cm/sup 2/, where line interference is absent. With the very small primary beam used for the energy dispersion measurements, this represents absolute detectability of 10/sup -12/ to 10 /sup -10/ g, in reasonable agreement with theoretical predictions. 4 figures, 5 tables.
57 citations
TL;DR: Pulse picking by resonant excitation in a storage ring creates in addition to the multi-bunch operation a distinct and separable single bunch soft X-ray source that creates unique opportunities for time-resolved photoemission studies as confirmed by time-of-flight spectra.
Abstract: Synchrotron radiation facilities routinely operate in a multi-bunch regime, but applications relying on time-of-flight schemes require single bunch operation. Here we show that pulse picking by resonant excitation in a storage ring creates in addition to the multi-bunch operation a distinct and separable single bunch soft X-ray source. It has variable polarization, a photon flux of up to 107–109 ph s−1/0.1%BW at purity values of 104–102 and a repetition rate of 1.25 MHz. The quasi-resonant excitation of incoherent betatron oscillations of electrons allows horizontal pulse separation at variable (also circular) polarization accessible for both, regular 30 ps pulses and ultrashort pulses of 2–3 ps duration. Combined with a new generation of angularly resolving electron spectrometers this creates unique opportunities for time-resolved photoemission studies as confirmed by time-of-flight spectra. Our pulse picking scheme is particularly suited for surface physics at diffraction-limited light sources promising ultimate spectral resolution. Although synchrotron facilities routinely operate in a multi-bunch regime for maximum average brilliance, studies relying on time-of-flight schemes require single-bunch operation. Here, Holldack et al.isolate and apply single bunch X-ray pulses from multibunch radiation using pulse picking by resonant excitation.
57 citations
TL;DR: The extremely red QSO 1413 + 135 has been interpreted as synchrotron emission from an electron distribution that ends sharply at some maximum energy as discussed by the authors, and the X-ray emission is probably inverse Compton radiation.
Abstract: The extremely red QSO 1413 + 135 shows characteristics typical of BL Lac objects—no emission lines, is embedded in a luminous galaxy, is subject to rapid radio and IR variability, has an inverted radio spectrum and shows substantial IR polarization. The rapid steepening of the nonthermal spectrum at λ < 5 µm is interpreted as synchrotron emission from an electron distribution that ends sharply at some maximum energy. The X-ray emission is probably inverse Compton radiation. We calculate that the optically thin emitting region is compact, has a large magnetic field and exhibits bulk relativistic motion towards the observer. The most energetic electrons in the emitting region have a Lorentz factor of 102–103.
57 citations
TL;DR: A model describing high power stable broadband coherent synchrotron radiation in the terahertz frequency region in an electron storage ring is presented, which gives a quantitative explanation of several features of the recent observations of CSR at the BESSY II storage ring.
Abstract: We present a model describing high power stable broadband coherent synchrotron radiation (CSR) in the terahertz frequency region in an electron storage ring. The model includes distortion of bunch shape from the synchrotron radiation (SR), which enhances higher frequency coherent emission, and limits to stable emission due to an instability excited by the SR wakefield. It gives a quantitative explanation of several features of the recent observations of CSR at the BESSY II storage ring. We also use this model to optimize the performance of a source for stable CSR emission.
57 citations