Single bunch X-ray pulses on demand from a multi-bunch synchrotron radiation source
| Autor: | S. Svensson, Danilo Kühn, Mihaela Gorgoi, Andreas Schälicke, Ruslan Ovsyannikov, Nils Mårtensson, Alexander Föhlisch, Roland Müller, Peter Kuske, Michael Scheer, Karsten Holldack, Torsten Leitner |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Atom and Molecular Physics and Optics
General Physics and Astronomy Synchrotron radiation Radiation 7. Clean energy General Biochemistry Genetics and Molecular Biology law.invention Optics law Physics Multidisciplinary business.industry Synchrotron Radiation Source Institut für Physik und Astronomie General Chemistry Betatron Polarization (waves) Condensed Matter Physics Synchrotron Pulse (physics) Physics::Accelerator Physics Atom- och molekylfysik och optik Atomic physics business Den kondenserade materiens fysik Storage ring |
| Zdroj: | Nature Communications |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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