Abstract
It has been shown that optical and ultraviolet radiation from relativistic electrons at planar channeling in optically transparent crystals is characterized by an unusual dependence on the polar and azimuth angles. A fraction of radiation with the frequency ω near which the derivative of the refractive index is nonzero, n'(ω) = dn(ω)/dω ≠ 0, should be observed at an angle close to π/2 with respect to the electron beam. For normal dispersion (n'(ω) > 0), this angle is smaller than π/2, whereas for anomalous dispersion (n'(ω) <0), it is larger than π/2 (“backward” radiation). A pronounced dependence of the radiation intensity on the azimuth angle φ, i.e., azimuthal asymmetry, appears beyond the region of normal and anomalous dispersion at a fixed polar angle θ. In particular, the ratio of radiation intensities at angles φ = 0 and π/2 at θ = π/2 reaches a maximum value of about the square of the refractive index.
| Original language | English |
|---|---|
| Pages (from-to) | 87-93 |
| Number of pages | 7 |
| Journal | JETP Letters |
| Volume | 103 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Jan 2016 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
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Asymmetry of the angular distribution of radiation of channeled relativistic electrons in optically transparent crystals. / Korotchenko, K. B.; Pivovarov, Yu L.
In: JETP Letters, Vol. 103, No. 2, 01.01.2016, p. 87-93.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Asymmetry of the angular distribution of radiation of channeled relativistic electrons in optically transparent crystals
AU - Korotchenko, K. B.
AU - Pivovarov, Yu L.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - It has been shown that optical and ultraviolet radiation from relativistic electrons at planar channeling in optically transparent crystals is characterized by an unusual dependence on the polar and azimuth angles. A fraction of radiation with the frequency ω near which the derivative of the refractive index is nonzero, n'(ω) = dn(ω)/dω ≠ 0, should be observed at an angle close to π/2 with respect to the electron beam. For normal dispersion (n'(ω) > 0), this angle is smaller than π/2, whereas for anomalous dispersion (n'(ω) <0), it is larger than π/2 (“backward” radiation). A pronounced dependence of the radiation intensity on the azimuth angle φ, i.e., azimuthal asymmetry, appears beyond the region of normal and anomalous dispersion at a fixed polar angle θ. In particular, the ratio of radiation intensities at angles φ = 0 and π/2 at θ = π/2 reaches a maximum value of about the square of the refractive index.
AB - It has been shown that optical and ultraviolet radiation from relativistic electrons at planar channeling in optically transparent crystals is characterized by an unusual dependence on the polar and azimuth angles. A fraction of radiation with the frequency ω near which the derivative of the refractive index is nonzero, n'(ω) = dn(ω)/dω ≠ 0, should be observed at an angle close to π/2 with respect to the electron beam. For normal dispersion (n'(ω) > 0), this angle is smaller than π/2, whereas for anomalous dispersion (n'(ω) <0), it is larger than π/2 (“backward” radiation). A pronounced dependence of the radiation intensity on the azimuth angle φ, i.e., azimuthal asymmetry, appears beyond the region of normal and anomalous dispersion at a fixed polar angle θ. In particular, the ratio of radiation intensities at angles φ = 0 and π/2 at θ = π/2 reaches a maximum value of about the square of the refractive index.
UR - http://www.scopus.com/inward/record.url?scp=84962896257&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962896257&partnerID=8YFLogxK
U2 - 10.1134/S0021364016020077
DO - 10.1134/S0021364016020077
M3 - Article
AN - SCOPUS:84962896257
VL - 103
SP - 87
EP - 93
JO - JETP Letters
JF - JETP Letters
SN - 0021-3640
IS - 2
ER -