Abstract
The crystal-assisted extraction of particles from high-energy proton colliders is discussed. The results corresponding to the beam energy of 50TeV are presented in more detail due to the FCC design study started at CERN. It is suggested to produce a horizontal dogleg with the Lambertson magnet in a straight section of the collider. In this case the vertical deflection of about 100μrad or even smaller in a bent crystal may be sufficient for the collider beam halo extraction. The optimal parameters of the crystal deflector and the extraction efficiency of a natural collider beam halo were estimated by simulation. The halo extraction may provide both the collimation for the collider and external beams for fixed target physics.
Highlights
IntroductionThe work was motivated by recent proposal on the design of a 100 TeV proton collider coming from CERN [1]
It is suggested to produce a horizontal dogleg with the Lambertson magnet in a straight section of the collider. In this case the vertical deflection of about 100 lrad or even smaller in a bent crystal may be sufficient for the collider beam halo extraction
The work was motivated by recent proposal on the design of a 100 TeV proton collider coming from CERN [1]
Summary
The work was motivated by recent proposal on the design of a 100 TeV proton collider coming from CERN [1]. The beam halo extraction by a bent crystal from high energy proton colliders LHC and SSC to perform simultaneous fixed target experiments had been proposed in [12,13]. Possible extraction scheme of 20 TeV protons from the SSC with a silicon crystal bent by the angle of 100 lrad has been suggested and simulation study of its efficiency have been performed in the frame of the super fixed target (SFT) project at the SSC Laboratory [4]. In this paper the optimal parameters of the crystal deflector with the bend angles of 50 and 100 lrad and the extraction efficiency of a natural halo of 50 TeV proton beam were estimated by simulation.
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