Photon emission and electron-positron photoproduction processes in the planar field of a bent single crystal

Bellucci, Stefano; Maisheev, V. A.

doi:10.1103/physreva.86.042902

Cited by 11 publications

(10 citation statements)

References 38 publications

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“…The main electrodynamic processes (such as the bremsstrahlung of electrons and positrons or the photoproduction of e AE -pairs) in bent single crystals have peculiarities and were considered in particular, in the paper [14] The paper is organized as follows. First, we give the mathematical description of the unperturbed characteristics of the volume reflection process and make a comparison with measurements.…”

Section: Introductionmentioning

confidence: 99%

Volume reflection and volume capture of ultrarelativistic particles in bent single crystals

Bellucci

Chesnokov

Maisheev

et al. 2015

Phys. Rev. ST Accel. Beams

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The paper is devoted to the study of volume reflection and volume capture of high energy particles moving in planar fields of bent single crystals. The influence of volume capture on the process of volume reflection was considered analytically. Relations describing various distributions of particles involved in the process, the probability of volume capture and the behavior of channeling and dechanneling fractions of a beam were obtained. Results of the study will be useful in the realization of multicrystal devices for collimation and extraction of beams on modern and future accelerators.

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Section: Introductionmentioning

confidence: 99%

Volume reflection and volume capture of ultrarelativistic particles in bent single crystals

Bellucci

Chesnokov

Maisheev

et al. 2015

Phys. Rev. ST Accel. Beams

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“…Due to this character of motion, the electron (positron) emits gamma quanta. A theoretical description of this radiation process can be found in the papers [10][11][12]. The first experiment to detect such radiation was performed at electron energy of 10 GeV [13] and showed satisfactory agreement with the calculations.…”

Section: Introductionmentioning

confidence: 84%

“…Because of this, radiation in volume reflection in bent crystals (and a thickness of 1 mm or more) is the main source of radiation losses of electrons. We note that the radiation in bent planes and in straight (unbent) planes of single crystals differs among themselves, although there is a definite relationship between them (see [10,11]). In comparison with radiation in bent planes, the radiation of electrons in straight planes has a sharper dependence on the angle of entry of particles into a single crystal relative to its planes and the region of such angles is much smaller.…”

Section: Introductionmentioning

confidence: 99%

Implementation of multistrip crystals to protect the septum magnets and to generate gamma radiation

Afonin

Barnov

Britvich

et al. 2019

Phys. Rev. Accel. Beams

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Recently studies are started on the application of volume reflection of particles in crystals for the steering beams (for extraction and collimation of a circulating beam in accelerators). Volume reflection is more efficient than channeling, but requires amplification of the deflection angle by applying multicrystals. The report discusses two new applications of multicrystals made like multistrip structures: (i) the property of effective deflection of particle beam was used to protect the septum magnets of the U-70 in the process of extraction of the proton beam with energy of 50 GeV; (ii) the possibility of generation of gamma radiation was studied in the secondary electron beam with energy of 7 GeV. In both cases, promising preliminary data were obtained.

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“…The main goal of the INSURAD experiment was measurement of radiation of 120 GeV positrons accompanying the process of volume reflection [18][19][20][21] in bent (110) crystallographic planes of a silicon single crystal. In addition in this experiment, the radiation of positrons channeled in (110) planes of silicon was measured.…”

Section: Calculation Of Radiation Energy Losses For Insurad Experimentsmentioning

confidence: 99%

Channeling radiation of multi-GeV positrons in single crystals

Chirkov

Chesnokov

Maisheev

et al. 2016

Int. J. Mod. Phys. A

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The process of radiation of 120 GeV positrons moving in a channeling regime in (011) plane of a single crystal was considered. At the beginning on the basis of the theory of nonlinear oscillations, the trajectory of moving positrons at different initial conditions was derived. Then taking into account the nonlinearity of motion, the distribution function over oscillation amplitudes of channeling particles was found. After this, the intensity of radiation at different initial conditions was calculated with the help of two various methods. These results may be useful for comparison with experimental data at positron energies from 100 and more GeV

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Photon emission and electron-positron photoproduction processes in the planar field of a bent single crystal

Cited by 11 publications

References 38 publications

Volume reflection and volume capture of ultrarelativistic particles in bent single crystals

Volume reflection and volume capture of ultrarelativistic particles in bent single crystals

Implementation of multistrip crystals to protect the septum magnets and to generate gamma radiation

Channeling radiation of multi-GeV positrons in single crystals

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