Abstract:We present an idea for creation of a crystalline undulator and report its first realization. One face of a silicon crystal was given periodic micro-scratches (trenches) by means of a diamond blade. The X-ray tests of the crystal deformation due to given periodic pattern of surface scratches have shown that a sinusoidal shape is observed on both the scratched surface and the opposite (unscratched) face of the crystal, that is, a periodic sinusoidal deformation goes through the bulk of the crystal. This opens up… Show more
“…Eqs. (14) and (15). For all crystals and over the whole range of photon energies the product ǫ x ǫ y of the photon source emittances is the smallest for the KEKB collider (labeled as '5' in the graphs in Fig.…”
Section: Numerical Resultsmentioning
confidence: 99%
“…A number of corresponding numerical results were presented to illustrate the developed theory. The importance of the ideas suggested and discussed in the cited papers has also been realized by other authors resulting in a significant increase of the number of publications in the field during last years [9][10][11][12][13][14][15][16][17] but, unfortunately, often without proper citation.…”
The scheme for accurate quantitative treatment of the radiation from a crystalline undulator in presence of the dechanneling and the photon attenuation is presented. The number of emitted photons and the brilliance of electromagnetic radiation generated by ultra-relativistic positrons channeling in a crystalline undulator are calculated for various crystals, positron energies and different bending parameters. It is demonstrated that with the use of high-energy positron beams available at present in modern colliders it is possible to generate the crystalline undulator radiation with energies from hundreds of keV up to tens of MeV region. The brilliance of the undulator radiation within this energy range is comparable to that of conventional light sources of the third generation but for much lower photon energies.
“…Eqs. (14) and (15). For all crystals and over the whole range of photon energies the product ǫ x ǫ y of the photon source emittances is the smallest for the KEKB collider (labeled as '5' in the graphs in Fig.…”
Section: Numerical Resultsmentioning
confidence: 99%
“…A number of corresponding numerical results were presented to illustrate the developed theory. The importance of the ideas suggested and discussed in the cited papers has also been realized by other authors resulting in a significant increase of the number of publications in the field during last years [9][10][11][12][13][14][15][16][17] but, unfortunately, often without proper citation.…”
The scheme for accurate quantitative treatment of the radiation from a crystalline undulator in presence of the dechanneling and the photon attenuation is presented. The number of emitted photons and the brilliance of electromagnetic radiation generated by ultra-relativistic positrons channeling in a crystalline undulator are calculated for various crystals, positron energies and different bending parameters. It is demonstrated that with the use of high-energy positron beams available at present in modern colliders it is possible to generate the crystalline undulator radiation with energies from hundreds of keV up to tens of MeV region. The brilliance of the undulator radiation within this energy range is comparable to that of conventional light sources of the third generation but for much lower photon energies.
“…Undulators with periods less than or on the order of a millimeter, often referred to as micro-undulators, are, therefore, of great interest. Several micro-undulator ideas have been proposed including electro-static undulators [3,4], crystalline undulators [5], RF-based [6], laser-plasma-based [7][8][9], and optical undulators [10][11][12][13][14][15][16][17]. In this Letter we propose a micro-undulator based on controlling the transverse forces experienced by an electron beam inside a laserexcited plasma channel.…”
“…Figs.1 and 2 illustrate the influence of media on the radiation in the crystal undulator [13,14,15]. In the silicon single crystal at photon energies larger than 10 KeV the dielectric function is smaller than 1.…”
Section: Examples Of Calculationsmentioning
confidence: 99%
“…One of the proposed constructions [13,14] was created and tested in a positron beam. Preliminary results of the experiment [15] give an indication on the observation of undulator radiation.…”
The radiation of relativistic charged particles for the quasiperiodic motion in a transparent medium is considered. For motion of the general kind the differential probability of the process is obtained. For planar motion the spectral intensity of radiation is found. The different cases of radiation in the medium-filled undulators are studied. In particular, the influence of Cherenkov radiation on the undulator one is discussed. PACS number(s): 41.60.-m
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