Development of spoke cavities for RIA

Shepard, K.W.; Kelly, Michael; Fuerst, J. D.; Kedzie, M.; Conway, Zachary

doi:10.1016/j.physc.2006.03.061

Cited by 5 publications

(5 citation statements)

References 3 publications

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“…Medium-β coaxial HWRs are fundamental components of the largest HI SC linac presently under construction, the Facility for Rare Isotope Beams (FRIB) [25]. Medium-β spoke resonators for HI have been successfully developed in the past for RIB facilities projects like RIA [47], which eventually was not built. Reviews of spoke cavities up to 2006 can be found in [19,48].…”

Section: Hwrs For Heavy Ion Beamsmentioning

confidence: 99%

“…β 0 =0.5 and β 0 =0.68 triple spoke resonators (TSR) working at 4.2 K with a gradient of 10 MV m −1 , with E P ∼27 MV m −1 and B p ∼88 mT were proposed in place of the baseline elliptical cavities [128] (figures 45 and 46). The TSRs have been designed, built and tested [47]. The parts underwent EP before welding of the end plates, and the final treatment after full assembly included a light CP and HPR and no H-degassing to remove Q-disease.…”

Section: Anl Triple-spoke and Coaxial Hwr Cavities For Riamentioning

confidence: 99%

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Low- to medium-β cavities for heavy ion acceleration

Facco¹

2016

Supercond. Sci. Technol.

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Acceleration of low- and medium-β heavy ions by means of superconducting (SC) linear accelerators (linacs) was made possible by the development, during four decades, of a particular class of cavities characterized by low operation frequency, several different shapes and different electromagnetic modes of operation. Their performance, initially rather poor in operating accelerators, have steadily increased along with the technological progress and nowadays the gap with the high-β, elliptical cavities is close to be filled. Initially confined to a very small number of applications, this family of cavities evolved in many directions becoming one of the most widespread in linacs. Nowadays it is present in the majority of superconducting radio-frequency ion linac projects worldwide. An overview of low- and medium-β SC cavities for heavy ions, focused on their recent evolution and achievements, will be given.

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Section: Hwrs For Heavy Ion Beamsmentioning

confidence: 99%

Section: Anl Triple-spoke and Coaxial Hwr Cavities For Riamentioning

confidence: 99%

Low- to medium-β cavities for heavy ion acceleration

Facco¹

2016

Supercond. Sci. Technol.

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“…We can see, by the double-spoke cavity, it needs only one type of cavity to cover the whole energy range, and the acceleration efficiency within the energy range is greater than 80%. Though the multi-spoke cavity is still in the stage of research in labs, it has attracted intensive interest in the past few decades and the R&D results in labs are quite promising [9][10][11]. In china, the study on the spoke cavity has achieved much progress in the past two years within the frame of the CADS project.…”

Section: Cavity Designmentioning

confidence: 99%

Updating the CSNS injector linac to 250 MeV with superconducting double-spoke cavities

李智慧

傅世年

Zh³

et al. 2015

Chinese Phys. C

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In order to update the beam power from 100 kW to 250 kW in China spallation neutron source (CSNS) Phase II, one of the important measures is to replace the 80 meters long beam transport line between the present 80 MeV linac injector and the RCS to another kind of acceleration structure. In this paper, we proposed a scheme based on 324 MHz double-spoke superconducting cavities. Unlike the superconducting elliptical cavity and normal conducting CCL structure, the double-spoke cavity belongs to TE mode structure and has smaller transvers dimension compared with that of TH mode one. It can work at base frequency as the DTL section, so that the cost and complexity of the RF system will be much decreased, and the behaviors of the beam dynamics are also improved significantly because of the low charge density and larger longitudinal acceptance. Furthermore, because of the relatively longer interactive length between charged particle and the electromagnetic field per cell, it needs relatively less cell numbers and it has larger velocity acceptance compared with the double frequency TH structures. The superconducting section consists of 14 cryomodules, each of which includes 3 superconducting cavities and a doublet. The general considerations on cavity and beam dynamics design are discussed and the main results are presented.

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“…A single test has been focused on coupler development, in which thermometers (and heaters for calibration) were attached to the 4K flange and the LN 2 heat exchanger flange. The coupler was attached to the powercoupling port of a 345 MHz, β = 0.5 triple-spoke cavity [2], which was then cooled to 4K for the RF tests.…”

Section: Rf Testsmentioning

confidence: 99%

“…Over the past decade, a class of superconducting cavities have been developed to accelerate ion beams for the production of rare isotopes [1,2]. The cavities range in frequency from 60 -350 MHz, will operate cw, and will have beam loading on the order of 1 -5 kW per cavity.…”

Section: Introductionmentioning

confidence: 99%

Variable CW RF power coupler for 345 MHz superconducting cavities

Shepard

Conway

Fuerst

et al. 2007

2007 IEEE Particle Accelerator Conference (PAC)

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This paper reports the development of a cw variable coupler for 345 MHz spoke-loaded superconducting (SC) cavities. The coupler inserts an 80K copper loop into a 5 cm (2 inch) interior diameter coupling port on several types of spoke-loaded cavity operating at 2K or 4K. The coupling loop can be moved during operation to vary the coupling over a range of 50 dB. The coupler is designed to facilitate high-pressure water rinsing and low-particulate clean assembly. Design details and operating characteristics are discussed.

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Development of spoke cavities for RIA

Cited by 5 publications

References 3 publications

Low- to medium-β cavities for heavy ion acceleration

Low- to medium-β cavities for heavy ion acceleration

Updating the CSNS injector linac to 250 MeV with superconducting double-spoke cavities

Variable CW RF power coupler for 345 MHz superconducting cavities

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