Deflection of charged particles in the hundred GeV regime using channeling in bent single crystals

Baker, S.; Carrigan, Richard A.; Crawford, C.; Toohig, T.E.; Gibson, W. M.; Jin, Huiran; Kim, I.-J.; Pisharody, M.; Salman, S.M.M.; Sun, C.; Wang, G.H.; Wijayawardana, R.; Forster, J.S.; Hatton, H.; Mitchell, I.V.; Guzik, Z.; Nigmanov, T.; Tsyganov, E.; Avdeichikov, V.V.; Ellison, J. A.; Siffert, P.

doi:10.1016/0370-2693(84)91120-1

Cited by 22 publications

(3 citation statements)

References 11 publications

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“…First experiments exploited multi-points benders, flexing a crystal plate by pressing metal pins on different positions and sides of the sample [69]. This technique is suitable for specimen several cm long, but is not suitable when short crystals and very homogeneous curvature are required (Figure 10).…”

Section: Bending Techniquesmentioning

confidence: 99%

Bent Crystal Design and Characterization for High-Energy Physics Experiments

et al. 2022

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Bent crystal are widely used as optics for X-rays, but via the phenomenon of planar channeling they may act as waveguide for relativistic charged particles beam as well, outperforming some of the traditional technologies currently employed. A physical description of the phenomenon and the resulting potential for applications in a particle accelerator is reported. The elastic properties of the anisotropic crystal lattice medium are discussed, introducing different types of curvature which can enable a wide array of bending schemes optimized for each different case features. The technological development of machining strategy and bending solutions useful for the fabrication of crystals suitable in high energy particle manipulations are described. As well as the high precision characterization processes developed in order to satisfy the strict requirements for installation in an accelerator. Finally, the characterization of channeling phenomenon in bent crystal is described, pointing out several experimental setups suitable to comply each specific case constrains.

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Section: Bending Techniquesmentioning

confidence: 99%

Bent Crystal Design and Characterization for High-Energy Physics Experiments

et al. 2022

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“…¥Îâ ÍÓÇÏÐËÇÄÑÅÑ AEÇ×ÎÇÍÕÑÓÂ àÕÂ ÒÑÓÑÅÑÄÂâ ÄÇÎËÚËÐÂ ÔÑÔÕÂÄÎâÇÕ ÒÓËÏÇÓÐÑ 1 ¤à£ ÔÏ À1 , AEÎâ ÅÇÓÏÂÐËÇÄÑÅÑ ì ÑÍÑÎÑ 2 ¤à£ ÔÏ À1 . ¿ÍÔÒÇÓËÏÇÐÕÞ Ô ÑÕÍÎÑÐÇÐËÇÏ ÒÖÚÍÂ ÒÓÑÕÑÐÑÄ ÏÑÐÑ-ÍÓËÔÕÂÎÎÂÏË ÍÓÇÏÐËâ Ë ÅÇÓÏÂÐËâ ÃÞÎË ÒÓÑÄÇAEÇÐÞ Ä ÑÃÎÂÔÕË àÐÇÓÅËÌ ÑÕ 1 AEÑ 800 ¤à£ Ä ªÁ ¶ [19],°ªÁª [16,17], ª ¶£¿ [18,24,39,47,48,84],¸¦²¯ [20,25,55,56,59] Ë ¶¯¡ [14,21,45]. ¢ÞÎË ÕÂÍÉÇ ÑÕÍÎÑÐÇÐÞ ÒÖÚÍË àÎÇÍÕÓÑÐÑÄ [22] Ë ÕâÉÇÎÞØ âAEÇÓ [23] Si (111) Si (110)…”

Section: £äçAeçðëçunclassified

Steering of high-energy charged-particle beams by bent single crystals

Biryukov¹,

Kotov²,

Chesnokov³

1994

Usp. Fiz. Nauk

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“…The technique chosen for crystal bending turned out to strongly affect the performance of beam manipulation. Initially, bending methods relied on direct mechanical bending [14], which did not cause a uniform bending of the crystal and required a cm-long crystal along the beam.…”

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Coherent Effects of High-Energy Particles in a GradedSi1−xGexCrystal

et al. 2013

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A graded Si(1-x)Ge(x) crystal has been manufactured for operation with high-energy protons to excite coherent interactions of the particles with the crystal such as channeling and volume reflection. The crystal had the shape of a parallelepiped though its (111) atomic planes were curved at a radius of 25.6 m because of the graded Ge content. The crystal was exposed to a 400 GeV/c proton beam at the external lines of CERN Super Proton Synchrotron to probe its capability to steer high-energy particles. Measured deflection efficiency was 62.0% under planar channeling and 96.0% under volume reflection. Such values are critically compared to their counterparts for a standard bent Si crystal under peer conditions. A Monte Carlo simulation of the dynamics of channeled and volume reflected particles in a graded crystal including the effect of Ge impurities and of lattice dislocations has been carried out. We found that the effect of crystal imperfections spoiled the efficiency of channeling while it negligibly affected the performance of volume reflection. We finally propose the usage of the graded crystal as a primary scatterer to aid halo collimation for the new generation of hadronic machines. As a unique feature, a properly cut graded crystal circumvents the problem of the miscut angle, which is currently a severe limitation for implementation of crystal-assisted collimation.

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Deflection of charged particles in the hundred GeV regime using channeling in bent single crystals

Cited by 22 publications

References 11 publications

Bent Crystal Design and Characterization for High-Energy Physics Experiments

Bent Crystal Design and Characterization for High-Energy Physics Experiments

Steering of high-energy charged-particle beams by bent single crystals

Coherent Effects of High-Energy Particles in a GradedSi1−xGexCrystal

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