Commissioning of a beam screen test bench experiment with a future circular hadron collider type synchrotron radiation beam

Gomez, Luis Antonio Gonzalez; Gil-Costa, M.; Baglin, V.; Chiggiato, Paolo; Garion, C.; Kersevan, R.; Casalbuoni, S.; Huttel, E.; Bellafont, I.; Pérez, Francis

doi:10.1103/physrevaccelbeams.22.083201

Cited by 10 publications

(16 citation statements)

References 11 publications

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“…The first hardware prototypes for FCC-hh were tested in 2017 at the KIT ANKA/KARA facility at Karlsruhe, with synchrotron radiation from an electron beam, whose spectrum and flux resembled those of the FCC-hh. These beam measurements at ANKA/KARA validated the basic design assumptions [485]. The latest version of the FCC-hh beamscreen design is shown in Fig.…”

Section: Post-lhc Hadron Colliderssupporting

confidence: 56%

Modern and Future Colliders

Shiltsev,

Zimmermann

2020

Preprint

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Section: Post-lhc Hadron Colliderssupporting

confidence: 56%

Modern and Future Colliders

Shiltsev,

Zimmermann

2020

Preprint

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“…We plan to test the vacuum chamber and photon absorbers behaviour using SR at the BESTEX beamline at the KARA light source [17], on 2 m-long prototypes. As BESTEX is not capable to reproduce the high SR power density of FCC-ee the SR absorbers will need to be tested from the point of view of their thermal behaviour using an appropriate source, e.g., an electron beam device.…”

Section: Future Workmentioning

confidence: 99%

The FCC-ee vacuum system, from conceptual to prototyping

Kersevan

2022

EPJ Techn Instrum

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The FCC-ee is a very challenging accelerator project from the point of view of vacuum. Apart from the sheer size of the machine, a twin-ring of 100 km circumference, the vacuum system design must be capable of dealing with the low-energy 45.6 GeV, high-current version of the machine (the Z-pole) as well as the higher energy, lower current versions. The main difficulty is related to the very much different synchrotron radiation (SR) spectra of the Z-pole vs the other energies, in particular the ttbar at 182.5 GeV. The critical energy of the SR spectrum of the Z-pole is 19.5 keV, while the ttbar exceeds 1.2 MeV. It is particularly challenging in terms of shielding the beryllium chamber in the detectors, for the Machine Detector Interface (MDI) area. We discuss the evolution of the vacuum system design for the arc sections, and some new ideas on NEG-coating, SR absorbers, and pumping system, with the aim to build prototypes soon, in the framework of the FCC Innovation Study program. The design of the vacuum hardware depends on the choices made for the magnets, and the required shielding from high-energy radiation generated by the circulating beam interacting with the residual gas and the interaction of the intense SR fans with the photon. There is also an important collaboration with the engineering integration of the vacuum system in the tunnel, particularly considering the full-energy booster injector, which is not detailed here. We also briefly describe the raytracing montecarlo modelling efforts carried out in the MDI area, and its pumping configuration.

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“…The possible molecule reservoirs between the flat surfaces can be thus evacuated. The good vacuum performance of the BS design has been benchmarked at BESTEX [22], a dedicated experimental setup built in the frame of the EuroCirCol project. It has been designed to explore PSD, photon heat loads, photon reflectivity and photoelectron generation originated in the inserted FCC-hh BS prototypes under SR irradiation, with a SR spectrum similar to the FCC-hh's one.…”

Section: The Fcc-hh Beam Screenmentioning

confidence: 99%

Beam induced vacuum effects in the future circular hadron collider beam vacuum chamber

Bellafont

Mether

Kersevan

et al. 2020

Phys. Rev. Accel. Beams

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EuroCirCol is a conceptual design study of a post-LHC, Future Circular Hadron Collider (FCC-hh) with 50 TeVof beam energy and 100 km long, which aims to expand the current energy and luminosity frontiers. The vacuum chamber of the FCC-hh will have to cope with unprecedented levels of synchrotron radiation power for proton colliders, dealing simultaneously with a tighter magnet aperture. Considering that the high radiation power and photon flux will release larger amounts of gas into the system, the difficulty to meet the vacuum specifications increases substantially compared with the LHC. This paper presents a study on the beam induced vacuum effects for the FCC-hh novel conditions, the different phenomena which, owing to the presence of the beam, have an impact on the accelerator's vacuum level. It is concluded that thanks to the adopted mitigation measures the proposed vacuum system shall be adequate, allowing us to reach ≤1 × 10 15 H 2 eq =m 3 with baseline beam parameters within the first months of conditioning.

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Commissioning of a beam screen test bench experiment with a future circular hadron collider type synchrotron radiation beam

Cited by 10 publications

References 11 publications

Modern and Future Colliders

Modern and Future Colliders

The FCC-ee vacuum system, from conceptual to prototyping

Beam induced vacuum effects in the future circular hadron collider beam vacuum chamber

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