نتایج جستجو برای: undulator radiation
تعداد نتایج: 238859 فیلتر نتایج به سال:
A method for generating femtosecond-duration x-ray pulses with a free-electron laser is presented. This method uses an energy-chirped electron beam propagating through an undulator to produce a frequencychirped x-ray pulse by self-amplified spontaneous emission. A short temporal pulse is created by use of a monochromator to select a narrow radiation bandwidth. A second undulator is used to ampl...
In LHC it will be important to measure with precision and in a non-destructive way the proton beam profiles from 450 GeV to 7 TeV. The chosen Synchrotron Radiation Monitor will make use of a two-period 5 T superconducting Undulator coupled to the D3 bending magnet in IR4. From the various variants studied, this combination is the only one which can cover the whole LHC energy range. By locating ...
A highly desirable measurement in Free Electron Laser (FEL) experiments is the dependency of the radiation power along the undulator. Most designs of undulators prohibit detection of the radiation power within the undulator or extracting the electron beam at arbitrary positions. Transport of both, the radiation "eld and the electron beam, through the entire undulator, and thus an ongoing FEL in...
Many proposals and ongoing national projects exist worldwide to build a single-pass X-ray FEL amplifier in which a high-brightness, multi-GeV electron beam has a resonant energy exchange with radiation in an undulator. Because of the practical limit on the undulator period, the electron beam energy represents one of constraints on the shortest reachable wavelength. Recently the high-order harmo...
The amplified spontaneous-emission (ASE) regime of a free electron laser (FEL) can be used to produce coherent soft X-ray radiation in a long undulator (5 5 L -< 10 m) [1-6] . In such a regime, the initial incoherent radiation, with an optical power proportional to the number of electrons, is amplified by the electron beam itself as it traverses the interaction region subject to the combined pe...
A new elementary mechanism of radiation due to the oscillatory character of a radiation reaction force appearing when a relativistic charged particle moves along a periodic structure without external fields is investigated. It is shown that the nonsynchronous spatial harmonics of Cherenkov-type radiation (CR) can give rise to the oscillation of a particle which consequently generates undulator-...
We represent results of calculations of coherent synchrotron radiation (CSR) of the relativistic bunch in an undulator with a vacuum chamber of arbitrary cross section with a new algorithm. This algorithm associated with direct calculations of electric field rather than the vector potential. CSR normalized to the incoherent one and compared with analytical calculations for a free space. INTRODU...
An undulator-based beamline was built and commissioned at the National Synchrotron Light Source to provide tunable coherent radiation in the 200-800 eV range. The low emittance of the storage ring means that the undulator source has high brightness so that a large flux of coherent x rays is delivered to experimental stations. The beamline uses a horizontally dispersing bichromator that allows t...
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