Crystalline Undulator with a Small Amplitude and a Short Period

Abstract

The crystalline undulator is a single crystal with periodically bent crystallographic planes. If ultrarelativistic charged particles channel through such a crystal, they emit hard radiation of undulator type. A crystalline undulator with a bending amplitude smaller than the distance between the bent planes and a bending period shorter than the period of channeling oscillations is proposed. Heretofore, it was believed that such a range of bending parameters was unsuitable for a crystalline undulator. This point of view is refuted. In fact, the undulator with a small amplitude and a short period is far superior to what was proposed previously. It requires much lower beam energy for production of photons of the same frequency. Such an undulator allows for a larger effective number of undulator periods. It is predicted to emit intense undulator radiation in the forward direction with a narrow spectral distribution and a lower and softer background. The undulator effect is seen for both positron and electron beams. Using positrons is, however, preferable because they enable one to obtain higher intensity of the undulator radiation with lower background.

5 pages, 3 figures, 1 table, ReVTeX4. v3: misprints are corrected, the discussion on manufacturing the undulator is extended

References in corpus (6)

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Cited by in corpus (20)

• Experimental evidence of planar channeling in a periodically bent crystal
• Steering of Sub-GeV electrons by ultrashort Si and Ge bent crystals
• Crystal-based intensive gamma-ray light sources
• All-atom relativistic molecular dynamics simulations of channeling and radiation processes in oriented crystals
• Radiation from multi-GeV electrons and positrons in periodically bent silicon crystal
• Simulation of Channeling and Radiation of 855 MeV Electrons and Positrons in a Small-Amplitude Short-Period Bent Crystal
• Silicon crystals for steering of high-intensity particle beams at ultra-high energy accelerators
• Channeling of electrons and positrons in straight and periodically bent diamond(110) crystals
• Complete treatment of single-photon emission in planar channeling
• Channeling and radiation of the 855 MeV electrons enhanced by the re-channeling in a periodically bent diamond crystal
• Efficient ultrafast photoacoustic transduction on Tantalum thin films
• Atomistic modelling and characterizaion of light sources based on small-amplitude short-period periodically bent crystals
• Interplay and specific features of radiation mechanisms of electrons and positrons in crystalline undulators
• Monte-Carlo Simulations of Electron Channelling: a Bent (110) Channel in Silicon
• Recent Progress in the Theory of the Crystalline Undulator
• Radiation of fast positrons interacting with periodic microstructure on the surface of a crystal
• Comment on `Radiation from multi-GeV electrons and positrons in periodically bent silicon crystal'
• Can electron beams be really focused by bent crystals?
• Strained Layer Crystalline Undulator
• Comment on 'Simulation of ultra-relativistic electrons and positrons channeling in crystals with MBN Explorer'