New results from the CERN-SPS beam deflection experiments with bent crystals

Baurichter, A.; Kirsebom, K.; Medenwaldt, R.; Møller, S.P.; Worm, T.; Uggerhøj, E.; Biino, C.; Clément, M.; Doble, N.; Elsener, K.; Gatignon, L.; Grafström, P.; Mikkelsen, U.; Freund, Andreas K.; Vilakazi, Z.; Siffert, P.; Hage‐Ali, M.

doi:10.1016/0168-583x(96)00202-9

Cited by 34 publications

(19 citation statements)

References 19 publications

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“…Thus, contrary to the previous experiments [8,9], the condition (1) was satisfied in our case due to using a short bent crystal. This gave us the possibility to observe the deflection of particles due to doughnut scattering in a bent crystal.…”

contrasting

confidence: 46%

“…[8]. Pioneering experiments [8,9] actually did not observe the beam deflection due to AC. Such experiments mainly highlighted a strong feed-in of particles into skew planar channels stretched to the side opposite to that of bending.…”

mentioning

confidence: 99%

“…A small beam fraction deflected up to the full crystal bending angle in the experiment described in Ref. [9] was later interpreted by simulation as partly generated by hyperchanneled particles [10].…”

mentioning

confidence: 99%

“…A silicon crystal bent along the h110i axes was used in the experiment [9] with a beam of 450 GeV=c protons. The channeling parameters were c 1 ¼ 21:6 rad and ¼ 50:3 m. The part of the crystal that was bent was 3 cm and the bending angle 3.1 mrad-the average bend radius R ¼ 9:7 m and the parameter k ¼ 34:6.…”

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confidence: 99%

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High-Efficiency Deflection of High-Energy Protons through Axial Channeling in a Bent Crystal

Scandale¹,

Vomiero²,

Baricordi³

et al. 2008

Phys. Rev. Lett.

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Beam deflection due to axial channeling in a silicon crystal bent along the h111i axis was observed with 400 GeV=c protons at the CERN Super Proton Synchrotron. The condition for doughnut scattering of protons by the atomic strings of the crystal was attained. Such a condition allowed one to observe a beam deflection of 50 rad with about 30% efficiency. The contribution of hyperchanneled states of protons to the observed beam deflection was less than 2% according to simulation results.

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confidence: 46%

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confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

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High-Efficiency Deflection of High-Energy Protons through Axial Channeling in a Bent Crystal

Scandale¹,

Vomiero²,

Baricordi³

et al. 2008

Phys. Rev. Lett.

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“…Condition (1) was found without taking into account incoherent scattering, i.e., α st is a function of particle energy and R and not of the crystal length. Pioneering experiments on axial channeling [12,13] failed to observe an efficient beam deflection at the nominal bending angle because Eq. (1) was not fulfilled, i.e., α α st .…”

Section: Introductionmentioning

confidence: 99%

Relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal

et al. 2016

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An investigation on the mechanism of relaxation of axially confined 400 GeV/c protons to planar channeling in a bent crystal was carried out at the extracted line H8 from CERN Super Proton Synchrotron. The experimental results were critically compared to computer simulations, showing a good agreement. We identified a necessary condition for the exploitation of axial confinement or its relaxation for particle beam manipulation in high-energy accelerators. We introduce the idea of using a short bent crystal, aligned with one of its main axis to the beam direction, as a beam steerer or a beam splitter with adjustable intensity in the field of particle accelerators. In particular, in the latter case, a complete relaxation from axial confinement to planar channeling takes place, resulting in beam splitting into the two strongest skew planar channels.

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