Measurement of ultralow vertical emittance using a calibrated vertical undulator

Wootton, Kent; Boland, Mark; Rassool, Roger

doi:10.1103/physrevstab.17.112802

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…This effect has been observed at the SLC, in agreement with the theoretical predictions [26]. -Modern light sources achieve CLIC-level vertical emittances, in particular the Swiss Light Source and the Australian Light Source [27][28][29]. -CLIC parameters require strong focusing at the IP.…”

Section: Beam-experimentssupporting

confidence: 76%

The CLIC project

Brunner¹,

Burrows²,

Calatroni³

et al. 2022

Preprint

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The Compact Linear Collider (CLIC) is a multi-TeV high-luminosity linear e + e − collider under development by the CLIC accelerator collaboration, hosted by CERN. The CLIC accelerator has been optimised for three energy stages at centre-of-mass energies 380 GeV, 1.5 TeV and 3 TeV [1]. CLIC uses a novel two-beam acceleration technique, with normal-conducting accelerating structures operating in the range of 70 MV/m to 100 MV/m. The report describes recent achievements in accelerator design, technology development, system tests and beam tests. Large-scale CLIC-specific beam tests have taken place, for example, at the CLIC Test Facility CTF3 at CERN [2], at the Accelerator Test Facility ATF2 at KEK [3,4], at the FACET facility at SLAC [5] and at the FERMI facility in Trieste [6]. Crucial experience also emanates from the expanding field of Free Electron Laser (FEL) linacs and recent-generation light sources. Together, they demonstrate that all implications of the CLIC design parameters are well understood and reproducible in beam tests and prove that the CLIC performance goals are realistic. An alternative CLIC scenario for the first stage, where the accelerating structures are powered by X-band klystrons, is also under study. The implementation of CLIC near CERN has been investigated. Focusing on a staged approach starting at 380 GeV, this includes civil engineering aspects, electrical networks, cooling and ventilation, installation scheduling, transport, and safety aspects. All CLIC studies have put emphasis on optimising cost and energy efficiency, and the resulting power and cost estimates are reported. The report follows very closely the accelerator project description in the CLIC Summary Report for the European Particle Physics Strategy update 2018-19 [7].

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Section: Beam-experimentssupporting

confidence: 76%

The CLIC project

Brunner¹,

Burrows²,

Calatroni³

et al. 2022

Preprint

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“…The main coupling figure of merit in lepton machines is represented by the vertical emittance divided by the horizontal emittance, ϵ y =ϵ x , which grows with vertical dispersion and coupling RDTs [33]. Vertical emittance can be either measured by beam profile monitors or inferred from the radiation emitted from vertical undulators [34].…”

Section: Optics Perturbations From Lattice Imperfectionsmentioning

confidence: 99%

Review of linear optics measurement and correction for charged particle accelerators

Tomás

Aiba

Franchi

et al. 2017

Phys. Rev. Accel. Beams

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Measurement and correction of charged particle beam optics have been a major concern since the advent of strong focusing synchrotron accelerators. Traditionally, particle colliders have led the development of optics control based on turn-by-turn beam centroid measurements, while lepton storage rings have focused on closed-orbit-response matrix techniques. Recently, considerable efforts are being invested in comparing these techniques at different synchrotron radiation sources and colliders. An emerging class of less invasive techniques based on the optimization of performance-related observables is demonstrating a great potential. In this paper, a review of existing techniques is presented highlighting comparisons, relative merits and limitations.

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“…As examples, for the Swiss Light Source, a small vertical beam size of 3.6 μm has been measured [7] by the π-polarization imaging method [8], and for the Australian synchrotron storage ring, a small vertical emittance of 2.6 pm rad has been evaluated by measuring radiation spectra from a vertical undulator [9], which can resolve a vertical emittance of the order of pm rad [10]. Recently, using the vertical undulator, even a vertical emittance of 0.9 pm rad has been successfully observed [11]. X-ray pinhole cameras (XPCs) with a resolution of less than 10 μm are also widely used, e.g., [12,13].…”

Section: Introductionmentioning

confidence: 99%

X-ray Fresnel diffractometry for ultralow emittance diagnostics of next generation synchrotron light sources

Masaki

Takano

Takao

et al. 2015

Phys. Rev. ST Accel. Beams

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A novel technique using single-slit x-ray Fresnel diffraction has been developed to resolve μm-order electron beam sizes at the insertion devices (IDs) of photon beam lines. The new technique is promising for diagnostics of next-generation light sources, where a tuning of ultralow emittance at insertion devices is essentially important to ensure the absence of the degradation of brilliance and the transverse coherence of radiation at beam lines due to distortion of lattice functions. The validity of the method was experimentally studied at SPring-8, and the achievable resolution is discussed.

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Measurement of ultralow vertical emittance using a calibrated vertical undulator

Cited by 4 publications

References 28 publications

The CLIC project

The CLIC project

Review of linear optics measurement and correction for charged particle accelerators

X-ray Fresnel diffractometry for ultralow emittance diagnostics of next generation synchrotron light sources

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