Volume reflection of 1-GeV protons by a bent silicon crystal

Ivanov, Yu. M.; Bondar, N.; Gavrikov, Yu.A.; Denisov, A.S.; Zhelamkov, A. V.; Ivochkin, V. G.; Kosyanenko, Sergey V.; Lapina, L.P.; Petrunin, A.; Skorobogatov, V. V.; Suvorov, V.M.; Shchetkovsky, A.I.; Taratin, A.M.; Scandale, W.

doi:10.1134/s0021364006190039

Cited by 42 publications

(34 citation statements)

References 4 publications

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“…This line goes above R u ðEÞ, R mult ðEÞ practically at all energies, so under conditions best suited for volume reflection (the colored band in Fig. 4), volume capture plays a minor role, while for experiments [2,3] it may be significant. As for the obtained estimate (72) itself, it is interesting to note that it obeys the scaling law P capt / RE À3=2 proposed in [30].…”

Section: Volume Capture and Volume Reflection Inefficiencymentioning

confidence: 90%

“…on the top of a potential barrier; its past history (which may as well include some amount of multiple scattering) is irrelevant. Let us estimate conditions at which this particle will be likely to lose a substantial fraction of its transverse kinetic energy after having rolled [32]; green-ITEP at 70 GeV, orientation (111) [2]; yellow-CERN PS at 13 GeV, orientation (110) [5]; red-PNPI at 1 GeV, orientation (111) [3]. Trianglesexperiment at CERN SPS, 180 GeV electrons and positrons, crystal orientation (111) [33].…”

Section: Volume Capture and Volume Reflection Inefficiencymentioning

confidence: 99%

“…Volume reflection [1] of ultrarelativistic charged particles from curved atomic planes of an oriented bent crystal has proved to be a viable option for beam steering at highenergy particle accelerators [2][3][4][5]. The physical condition of its applicability essentially coincides with the Tsyganov condition for channeled beam deflection in a bent crystal: R > R c , with R the crystal bending radius, and R c the so-called critical radius proportional to the particle energy [Eq.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Volume Capture and Volume Reflection Inefficiencymentioning

confidence: 90%

Section: Volume Capture and Volume Reflection Inefficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nuclear interactions at volume reflection: Perturbative treatment

Bondarenco

2012

Phys. Rev. ST Accel. Beams

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“…A method to diminish the influence of incoherent scattering with nuclei to the deflection efficiency could be the usage of the coherent interactions of above-barrier particles, i.e., not channeled, with bent crystals. This is possible with the help of the volume reflection mechanism, that was proposed in [5] and experimentally observed in [6,7]. Under volume reflection, particles that move in a bent crystal in above-barrier states with respect to the planar potential wells are deflected to the direction, that is opposite to the direction of crystal bend.…”

Section: Introductionmentioning

confidence: 99%

Influence of incoherent scattering on stochastic deflection of high-energy negative particle beams in bent crystals

et al. 2017

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An investigation on stochastic deflection of highenergy negatively charged particles in a bent crystal was carried out. On the basis of analytical calculation and numerical simulation it was shown that there is a maximum angle at which most of the beam is deflected. The existence of a maximum, which is taken in the correspondence of the optimal radius of curvature, is a novelty with respect to the case of positively charged particles, for which the deflection angle can be freely increased by increasing the crystal length. This difference has to be ascribed to the stronger contribution of incoherent scattering affecting the dynamics of negative particles that move closer to atomic nuclei and electrons. We therefore identified the ideal parameters for the exploitation of axial confinement for negatively charged particle beam manipulation in future high-energy accelerators, e.g., ILC or muon colliders.

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“…The charged particle volume reflection phenomenon in bent crystals predicted in [10,11] and observed in [12,13] has been studied at the CERN Super Proton Synchrotron (SPS) resulting in the deflection of a 400 GeV proton beam of an angle of about 14 rad [9,14]. The larger deflection efficiency and the wider angular acceptance of volume reflection (VR) with respect to channeling was firmly established.…”

mentioning

confidence: 99%

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

Scandale¹,

Vomiero²,

Baricordi³

et al. 2009

Phys. Rev. Lett.

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The interactions of 400 GeV protons with different sequences of bent silicon crystals have been investigated at the H8 beam line of the CERN Super Proton Synchrotron. The multiple volume reflection of the proton beam has been studied in detail on a five-crystal reflector measuring an angular beam deflection ¼ 52:96 AE 0:14 rad. The efficiency was found larger than 80% for an angular acceptance at the reflector entrance of 70 rad, with a maximal efficiency value of " ¼ 0:90 AE 0:01 AE 0:03.

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Volume reflection of 1-GeV protons by a bent silicon crystal

Cited by 42 publications

References 4 publications

Nuclear interactions at volume reflection: Perturbative treatment

Nuclear interactions at volume reflection: Perturbative treatment

Influence of incoherent scattering on stochastic deflection of high-energy negative particle beams in bent crystals

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

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