Mazzolari A, Romagnoni M, Camattari R, Bagli E, Bandiera L, Germogli G, Guidi V, Cavoto G
1INFN Sezione di Ferrara, Via Saragat 1, 44122 Ferrara, Italy.
Dipartimento di Fisica e Scienze della Terra, Università degli Studi di Ferrara Via Saragat 1, 44122 Ferrara, Italy.
Eur Phys J C Part Fields. 2018;78(9):720. doi: 10.1140/epjc/s10052-018-6196-z. Epub 2018 Sep 6.
Charged particle beams can be manipulated by exploiting the channeling phenomenon in bent crystals. Two plate-like crystals, bent by mechanical holders, were manufactured and characterised for such purpose at the Sensor and Semiconductor Laboratory in Ferrara, Italy. An anticlastic curvature was obtained for these crystals, achieving a steering angle of the order of 1 mrad, which is about 20 times larger than the values currently achieved for the bent crystals used in the LHC for collimation experiments. Finally, a Geant4 simulation was performed to study the channeling efficiency for beam deflection with 400 GeV/c and 7 TeV/c proton beams. Such crystals represent technological progress in the development of bent crystals for highly energetic charged particle beams. Indeed, they are designed to impart an angular kick to a 7 TeV/c proton beam with unprecedented high efficiency. Therefore, this study demonstrates the possibility of realizing bent crystals suitable for beam extraction in high-energy hadron accelerators, such as LHC or at the future FCC. A further series of studies should be conducted to evaluate the channeling efficiency and the deflection angle of the realized crystals via a charged proton beam.
通过利用弯曲晶体中的沟道效应，可以对带电粒子束进行操控。为此，在意大利费拉拉的传感器与半导体实验室制造并表征了两块由机械夹具弯曲的板状晶体。这些晶体获得了鞍形曲率，实现了约1毫弧度的转向角，这比目前大型强子对撞机（LHC）用于准直实验的弯曲晶体所达到的值大大约20倍。最后，进行了Geant4模拟，以研究400 GeV/c和7 TeV/c质子束在束流偏转时的沟道效率。此类晶体代表了用于高能带电粒子束的弯曲晶体开发方面的技术进步。实际上，它们被设计用于以前所未有的高效率给7 TeV/c质子束一个角向踢。因此，本研究证明了在高能强子加速器（如LHC或未来的FCC）中实现适用于束流引出的弯曲晶体的可能性。应通过一系列进一步的研究，利用带电质子束评估所实现晶体的沟道效率和偏转角。
