Abstract
Results of existing experimental studies of the radiation from crystalline undulator as well as of the channeling phenomenon in periodically bent crystals are reviwed. As of now, the experiments with positron beams have not presented a convincing evidence of the CUR signal. This is mainly due to the insufficient quality of the beam and of the periodic structure of crystal. The first clear experimental evidence of CUR was obtained with low-energy electron beams (below 1 GeV) at MAinz MIcrotron (MAMI) facility (Backe et al., Nuovo Cimento C 34:157–165, 2011). The CUs used in the experiment were based on graded composition strained layers Si\(_{1-x}\)Ge\(_{x}\) and were manufactured in Aarhus University (Denmark).
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Notes
- 1.
In [44, 45] the spectral intensity was written in terms of the number \(N_{\gamma }\) of emitted photons, \(\mathrm {d} E/\hbar \mathrm {d} \omega = \hbar \mathrm {d} \omega \left( \mathrm {d} N_{\gamma }/\hbar \mathrm {d} \omega \right) \).
- 2.
The value \(|y| = 0.35h\) corresponds to upper limit of the distance from the midplane indicated in Quote 3.
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Korol, A.V., Solov’yov, A.V., Greiner, W. (2014). Experimental Studies of CUR. In: Channeling and Radiation in Periodically Bent Crystals. Springer Series on Atomic, Optical, and Plasma Physics, vol 69. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54933-5_7
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DOI: https://doi.org/10.1007/978-3-642-54933-5_7
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