Observation of Multiple Volume Reflection of Ultrarelativistic Protons by a Sequence of Several Bent Silicon Crystals

Scandale, W.; Vomiero, Alberto; Baricordi, S.; Dalpiaz, P.; Fiorini, M.; Guidi, V.; Mazzolari, A.; Mea, G. Della; Milan, Riccardo; Ambrosi, G.; Zuccon, P.; Bertucci, B.; Burger, W. J.; Duranti, M.; Cavoto, G.; Santacesaria, R.; Valente, P.; Luci, C.; Iacoangeli, F.; Vallazza, E.; Afonin, A. G.; Chesnokov, Yu. A.; Kotov, V.I.; Maisheev, V. A.; Yazynin, I. A.; Kovalenko, A. D.; Taratin, A.M.; Denisov, A.S.; Gavrikov, Yury A.; Ivanov, Yu. M.; Lapina, L.P.; Malyarenko, L.G.; Skorogobogatov, V. V.; Suvorov, V.M.; Vavilov, S.; Bolognini, Davide; Hasan, S.; Mozzanica, A.; Prest, M.

doi:10.1103/physrevlett.102.084801

Cited by 39 publications

(14 citation statements)

References 17 publications

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“…Accelerator physics problems require an increase in the reflection angle by several times. To this end, the following two methods were proposed: first, reflection on a chain of crystals [6] and, second, reflection in one crystal oriented near the axis by the total potential of several skew planes [7,8].…”

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confidence: 99%

Collimation of the circulating beam in the U-70 synchrotron by means of the reflection of particles in crystals with axial orientation

et al. 2011

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The possibilities of the extraction and collimation of a circulating beam by a new method due to the reflection of particles in crystals with axial orientation were experimentally investigated in the Fall-2010 run at the U_70 synchrotron. Such crystals have positive features, because the axial potential is five times larger than the planar potential. It has been shown that the collimation efficiency can reach 90% due to axial effects in the crystal. Losses of the circulating beam on a collimator have been reduced by several times; this makes it possible to suppress the muon jet near the steel collimator of the circulating beam.

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confidence: 99%

Collimation of the circulating beam in the U-70 synchrotron by means of the reflection of particles in crystals with axial orientation

et al. 2011

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“…In fact, one may expect the electromagnetic cascade in an oriented bent crystal to be significantly shorter than in an amorphous medium. The use of a multicrystal system could be foreseen for this goal [16].…”

Section: Discussionmentioning

confidence: 99%

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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“…The price to pay is that volume reflection angle is of the order of the Lindhard's critical angle c ¼ ffiffiffiffiffiffiffiffiffiffiffiffiffiffi 2V 0 =E p , where V 0 is the interplanar continuous potential well depth, and E the particle energy, so at E) )V 0 the angle of single deflection is pretty small. Fortunately, this difficulty can be surmounted by transmitting the particle through a sequence of bent crystals [6], or arranging a composite volume reflection from several crystallographic planes within one crystal [7], thereby multiplying the deflection angle. Experiments on volume reflection begun within a decade, and are currently continuing.…”

Section: Introductionmentioning

confidence: 99%

Nuclear interactions at volume reflection: Perturbative treatment

Bondarenco

2012

Phys. Rev. ST Accel. Beams

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Excess of nuclear interaction probability at volume reflection is evaluated within the approximation of dominance of the continuous planar potential and thin nuclear concentrations. The domain of the adopted approximations is determined. An estimate of the volume capture probability is provided. The theoretical predictions for inelastic nuclear interaction probability and for the final beam divergence are compared with the results of recent experiments, with satisfactory agreement within the theory applicability domain.

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Observation of Multiple Volume Reflection of Ultrarelativistic Protons by a Sequence of Several Bent Silicon Crystals

Cited by 39 publications

References 17 publications

Collimation of the circulating beam in the U-70 synchrotron by means of the reflection of particles in crystals with axial orientation

Collimation of the circulating beam in the U-70 synchrotron by means of the reflection of particles in crystals with axial orientation

Photoproduction of electron-positron pairs in bent single crystals

Nuclear interactions at volume reflection: Perturbative treatment

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