Superstrong Adjustable Permanent Magnet for a Linear Collider Final Focus

Mihara, T.

doi:10.2172/839806

Cited by 6 publications

(7 citation statements)

References 4 publications

(6 reference statements)

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“…The focusing element will consist of a set of permanent magnet quadrupoles (PMQs) [15][16][17] based on a hybrid Halbach array in order to maximize the magnetic field strength, quality and uniformity by keeping the system as compact as possible. A quadrupole set is necessary to obtain a focusing effect on both transversal planes, as well as for a suitable matching with selection system acceptance.…”

Section: Overview Of the Elimaia Beam Linementioning

confidence: 99%

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

et al. 2015

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Charged particle acceleration using ultra-intense and ultra-short laser pulses has gathered a strong interest in the scientific community and it is now one of the most attractive topics in the relativistic laser-plasma interaction research. Indeed, it could represent the future of particle acceleration and open new scenarios in multidisciplinary fields, in particular, medical applications. One of the biggest challenges consists of using, in a future perspective, high intensity laser-target interaction to generate high-energy ions for therapeutic purposes, eventually replacing the old paradigm of acceleration, characterized OPEN ACCESSAppl. Sci. 2015, 5 428 by huge and complex machines. The peculiarities of laser-driven beams led to develop new strategies and advanced techniques for transport, diagnostics and dosimetry of the accelerated particles, due to the wide energy spread, the angular divergence and the extremely intense pulses. In this framework, the realization of the ELIMED (ELI-Beamlines MEDical applications) beamline, developed by INFN-LNS (Catania, Italy) and installed in 2017 as a part of the ELIMAIA beamline at the ELI-Beamlines (Extreme Light Infrastructure Beamlines) facility in Prague, has the aim to investigate the feasibility of using laser-driven ion beams in multidisciplinary applications. ELIMED will represent the first user's open transport beam line where a controlled laser-driven ion beam will be used for multidisciplinary and medical studies. In this paper, an overview of the beamline, with a detailed description of the main transport elements, will be presented. Moreover, a description of the detectors dedicated to diagnostics and dosimetry will be reported, with some preliminary results obtained both with accelerator-driven and laser-driven beams.

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Section: Overview Of the Elimaia Beam Linementioning

confidence: 99%

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

et al. 2015

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“…5 show repeated measurements of integrated strength over several hours in the strongest case and weakest case respectively. Each strength measurement takes about 3 minutes [4]. The strongest and weakest integrated strengths are 24.2 T and 3.47 T, respectively.…”

Section: Permanent Variable-strength Quadrupolementioning

confidence: 99%

Variable Permanent Magnet Quadrupole

Mihara

Iwashita

Kumada³

et al. 2006

IEEE Trans. Appl. Supercond.

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A permanent magnet quadrupole (PMQ) is one of the candidates for the final focus lens in a linear collider. An over 120 T/m strong variable permanent magnet quadrupole is achieved by the introduction of saturated iron and a 'double ring structure'. A fabricated PMQ achieved 24 T integrated gradient with φ20 mm bore diameter, φ100 mm magnet diameter and 20 cm pole length. The strength of the PMQ is adjustable in 1.4 T steps, due to its 'double ring structure': the PMQ is split into two nested rings; the outer ring is sliced along the beam line into four parts and is rotated to change the strength. This paper describes the variable PMQ from fabrication to recent adjustments.To be published in IEEE Trans.Appl.Superconductivity * Work supported in part by Department of Energy contract DE-AC02-76SF00515. MOA07PO06.Abstract-A permanent magnet quadrupole (PMQ) is one of the candidates for the final focus lens in a linear collider. An over 120 T/m strong variable permanent magnet quadrupole is achieved by the introduction of saturated iron and a 'double ring structure'. A fabricated PMQ achieved 24 T integrated gradient with φ20 mm bore diameter, φ100 mm magnet diameter and 20 cm pole length. The strength of the PMQ is adjustable in 1.4 T steps, due to its 'double ring structure': the PMQ is split into two nested rings; the outer ring is sliced along the beam line into four parts and is rotated to change the strength. This paper describes the variable PMQ from fabrication to recent adjustments.

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“…Permanent-magnet quadrupole-devices (PMQs) with a small aperture can reach high magnetic field gradients and still maintain high surface magnetization. A number of design approaches have been developed and realized such as pure PMQs [1,2] in accordance with a Halbach design [3] or as modified (hybrid) Halbach quadrupoledevices utilizing saturated iron to guide the magnetic field [4,5].…”

Section: Introductionmentioning

confidence: 99%

Characterization and tuning of ultrahigh gradient permanent magnet quadrupoles

Becker

Bußmann

Raith

et al. 2009

Phys. Rev. ST Accel. Beams

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The application of quadrupole-devices with high field gradients and small apertures requires precise control over higher order multipole field components. We present a new scheme for performance control and tuning, which allows the illumination of most of the quadrupole-device aperture because of the reduction of higher order field components. Consequently, the size of the aperture can be minimized to match the beam size achieving field gradients of up to 500 T m −1 at good imaging quality. The characterization method based on a Hall probe measurement and a Fourier analysis was confirmed using the high quality electron beam at the Mainz Microtron MAMI.

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Superstrong Adjustable Permanent Magnet for a Linear Collider Final Focus

Cited by 6 publications

References 4 publications

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

Design and Status of the ELIMED Beam Line for Laser-Driven Ion Beams

Variable Permanent Magnet Quadrupole

Characterization and tuning of ultrahigh gradient permanent magnet quadrupoles

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