Investigation of the emission of photons induced in the volume reflection of 10-GeV positrons in a bent silicon single crystal

Afonin, A. G.; Baranov, V. T.; Britvich, G. I.; Bugorskii, A.P.; Kotov, V.I.; Kushnirenko, A. E.; Maisheev, V. A.; Pikalov, V. A.; Chepegin, V. N.; Chesnokov, Yu. A.; Yazynin, I. A.; Ivanov, Yu. M.; Skorobogatov, V. V.

doi:10.1134/s0021364008190028

Cited by 13 publications

(9 citation statements)

References 7 publications

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“…It should be noted that the considered pair production process in bent crystals analyzed in this paper is similar to the process of radiation emission of over-barrier positrons (electrons) experimentally investigated in [2,3]. The comparison with the theoretical predictions in that case was satisfactory.…”

Section: Discussionsupporting

confidence: 71%

“…In recent years several experiments studying different processes of charged particle interaction with bent single crystals were performed [1][2][3]. In particular, the process of radiation emission of ultrarelativistic electrons and positrons moving in the planar fields of a bent single crystal was investigated.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the process of radiation emission of ultrarelativistic electrons and positrons moving in the planar fields of a bent single crystal was investigated. The experiments have shown a significant increase of the radiation energy losses of electrons and positrons in conditions of volume reflection [2,3]. The present paper considers the process of e ± -pair creation by high energy photons moving in a bent single crystal with a constant curvature.…”

Section: Introductionmentioning

confidence: 99%

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Photoproduction of electron-positron pairs in bent single crystals

Chesnokov

Maisheev

Bolognini

et al. 2010

Phys. Rev. ST Accel. Beams

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The process of photoproduction of electron-positron pairs in bent single crystals is considered. This consideration is based on the theory of coherent pairproduction in straight single crystals and take into account the linear polarization of the photon beam. In particular, it is shown that the probability of the process for gamma quanta with energies from 100 GeV is significantly higher than the one in an amorphous medium. The positive features of the photoproduction in bent crystals compared to straight ones are underlined from the point of view of possible applications

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Section: Discussionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photoproduction of electron-positron pairs in bent single crystals

Chesnokov

Maisheev

Bolognini

et al. 2010

Phys. Rev. ST Accel. Beams

Self Cite

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“…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. Then, measurements of the radiation with volume reflection in silicon crystals at energies 180 [14] and 120 [15] GeV were performed.…”

Section: Introductionmentioning

confidence: 84%

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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“…In the last decade, channeling and the related effects have been investigated in bent crystals, mostly for beam steering for applications in collimation and extraction in hadronic accelerators [9,10,11,12,13,14]. Recently, such investigations were extended to the cases of electrons and positrons [15,16,17,18,19,20,21,22], for which the processes of radiation emission are modified by the presence of the crystal curvature.…”

Section: Introductionmentioning

confidence: 99%

Investigation on radiation generated by Sub-GeV electrons in ultrashort Si and Ge bent crystals

Bandiera,

Sytov,

De Salvador

et al. 2020

Preprint

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We report on the measurements of the spectra of gamma radiation generated by 855 MeV electrons in bent silicon and germanium crystals at MAMI (MAinzer MIkrotron). The crystals were 15 µm thick along the beam direction to ensure high deflection efficiency. Their (111) crystalline planes were bent by means of a piezo-actuated mechanical holder, which allowed to remotely change the crystal curvature. In such a way it was possible to investigate the radiation emitted under planar channeling and volume reflection as a function of the curvature of the crystalline planes. We show that using volume reflection, one can produce intense gamma radiation with comparable intensity but higher angular acceptance than for channeling. We studied the trade-off between radiation intensity and angular acceptance at different values of the crystal curvature. The measurements of radiation spectra have been carried out for the first time in bent Germanium crystals. In particular, the intensity of radiation in the Ge crystal is higher than in the Si one due to the higher atomic number, which is important for the development of the X-ray and gamma radiation sources based on higher-Z deformed crystals, such as crystalline undulator.

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Investigation of the emission of photons induced in the volume reflection of 10-GeV positrons in a bent silicon single crystal

Cited by 13 publications

References 7 publications

Photoproduction of electron-positron pairs in bent single crystals

Photoproduction of electron-positron pairs in bent single crystals

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

Investigation on radiation generated by Sub-GeV electrons in ultrashort Si and Ge bent crystals

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