Abstract
Modern accelerator technologies may provide electron beams consisting of ultrashort bunches with transverse sizes, which are much larger than longitudinal sizes. The spectral-angular characteristics of coherent Cherenkov radiation (CChR) produced by such bunches have thus been considered. We simulated the characteristics of CChR and those from a single charge on the basis of the polarization current model, which allowed us to consider finite sizes for the Cherenkov radiator. We calculated the angular distribution of the CChR from a bunch tilted by angle ψ with respect to the velocity direction, with the assumption of a 3-D Gaussian charge distribution in the bunch. Contrary to the azimuthally symmetrical distribution of conventional ChR, a strong azimuthal asymmetry was observed in the CChR from the tilted bunch. The maximal yield of the CChR may be achieved if the tilt angle ψ coincides with the Cherenkov angle Θ ch =arccos(1/nβ), βc is the charge velocity and n is the refraction index.
| Original language | English |
|---|---|
| Pages (from-to) | 888-893 |
| Number of pages | 6 |
| Journal | Physics Letters, Section A: General, Atomic and Solid State Physics |
| Volume | 383 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 28 Feb 2019 |
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Keywords
- Azimuthal asymmetry
- Cherenkov radiation
- Coherent radiation
- Terahertz radiation
- Tilted bunch
- Transition radiation
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Azimuthal asymmetry of coherent Cherenkov radiation from a tilted bunch. / Gogolev, S. Yu; Potylitsyn, A. P.
In: Physics Letters, Section A: General, Atomic and Solid State Physics, Vol. 383, No. 9, 28.02.2019, p. 888-893.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Azimuthal asymmetry of coherent Cherenkov radiation from a tilted bunch
AU - Gogolev, S. Yu
AU - Potylitsyn, A. P.
PY - 2019/2/28
Y1 - 2019/2/28
N2 - Modern accelerator technologies may provide electron beams consisting of ultrashort bunches with transverse sizes, which are much larger than longitudinal sizes. The spectral-angular characteristics of coherent Cherenkov radiation (CChR) produced by such bunches have thus been considered. We simulated the characteristics of CChR and those from a single charge on the basis of the polarization current model, which allowed us to consider finite sizes for the Cherenkov radiator. We calculated the angular distribution of the CChR from a bunch tilted by angle ψ with respect to the velocity direction, with the assumption of a 3-D Gaussian charge distribution in the bunch. Contrary to the azimuthally symmetrical distribution of conventional ChR, a strong azimuthal asymmetry was observed in the CChR from the tilted bunch. The maximal yield of the CChR may be achieved if the tilt angle ψ coincides with the Cherenkov angle Θ ch =arccos(1/nβ), βc is the charge velocity and n is the refraction index.
AB - Modern accelerator technologies may provide electron beams consisting of ultrashort bunches with transverse sizes, which are much larger than longitudinal sizes. The spectral-angular characteristics of coherent Cherenkov radiation (CChR) produced by such bunches have thus been considered. We simulated the characteristics of CChR and those from a single charge on the basis of the polarization current model, which allowed us to consider finite sizes for the Cherenkov radiator. We calculated the angular distribution of the CChR from a bunch tilted by angle ψ with respect to the velocity direction, with the assumption of a 3-D Gaussian charge distribution in the bunch. Contrary to the azimuthally symmetrical distribution of conventional ChR, a strong azimuthal asymmetry was observed in the CChR from the tilted bunch. The maximal yield of the CChR may be achieved if the tilt angle ψ coincides with the Cherenkov angle Θ ch =arccos(1/nβ), βc is the charge velocity and n is the refraction index.
KW - Azimuthal asymmetry
KW - Cherenkov radiation
KW - Coherent radiation
KW - Terahertz radiation
KW - Tilted bunch
KW - Transition radiation
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UR - http://www.scopus.com/inward/citedby.url?scp=85058230009&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2018.12.004
DO - 10.1016/j.physleta.2018.12.004
M3 - Article
VL - 383
SP - 888
EP - 893
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
SN - 0375-9601
IS - 9
ER -