Development of a 325 MHz β=0.12 superconducting single spoke cavity for China-ADS

Li, Han; Dai, JP; Sha, Peng; Wang, Qunyao; Huang, Heng; Li, Li-Hai; Zhang, Juan; Ma, Qiang; Lin, Hang; Sun, Yipeng; Pan, Weimin

doi:10.1088/1674-1137/38/7/077008

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…The absence of steering make HWRs the only viable cavities which cover efficiently the intermediate-β range of 0.2<β 0 <0.5, spanning between QWRs and multi-cell elliptical cavities ranges (re-entrant cavities could do it with a significantly lower efficiency). In some cases, when full elimination of steering is critical like in high beam intensity linacs, HWRs have been chosen instead of QWRs also at β<0.2, at frequencies around 162-176 MHz for coaxial ones [37][38][39][40] and ∼322-352 MHz for spoke ones, due to their larger transverse size and volume at lower β [41][42][43][44].…”

Section: Hwr Peculiaritiesmentioning

confidence: 99%

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: Hwr Peculiaritiesmentioning

confidence: 99%

Low- to medium-β cavities for heavy ion acceleration

Facco¹

2016

Supercond. Sci. Technol.

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“…The initial design of the β=0.12, f =325 MHz racetrack-shaped PKU-2 single spoke cavity for Chinese ADS can be found in Ref. [4]. It has a racetrack-shaped inner conductor with a circular (Φ=35 mm) beam pipe area.…”

Section: Field Asymmetrymentioning

confidence: 99%

A preliminary quadrupole asymmetry study of a β=0.12 superconducting single spoke cavity

Yang¹,

Lu²,

Liu³

et al. 2014

Chinese Phys. C

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“…Figure 1 shows the fabricated model of the 325 MHz fundamental power coupler (FPC). We developed an FPC for a 325 MHz single-spoke resonator (SSR) for use in proton or heavy-ion accelerators [1][2][3]. The single-spoke structure is used to accelerate the beam to the low to the middle beta range.…”

Section: Introductionmentioning

confidence: 99%

“…The RF and beam parameters of the SSR1 from the RISP are shown in table 1. The main feature of the fabricated power coupler is that the antenna penetration depth can be adjusted using the transition box between the 3 1 8 -inch input port and the RF window section. To minimize the emission of electrons, the impedance had to be increased, and accordingly, the diameter of the antenna became smaller than a conventional 3 1 8 -inch Electronic Industries Alliance (EIA) 50-Ω coaxial transmission…”

Section: Introductionmentioning

confidence: 99%

High power test of the power coupler for 325 MHz superconducting cavities with standing waves

2022

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The fabricated power coupler is a coaxial capacitive-type coupler based on a conventional 3 1/8-inch Electronic Industries Alliance 50-Ω coaxial transmission line with a titanium nitride (TiN)-coated ceramic disk window. A high-power test in a standing wave was performed with the 20 kW and 325 MHz solid-state power amplifier (SSPA). The standing wave test is similar to the RF conditioning condition of the cavity before beam operation. It is also possible to adjust the position of the maximum power applied to the power coupler. Two power couplers were connected to a rectangular test cavity with a high vacuum and various measuring equipment, such as an arc detector, a power meter, a temperature sensor, and an electron pick-up probe. The interlock system under vacuum and arc instrumentation prevented the RF window from breaking the power coupler window during the high-power test. The interlock system was operated when the temperature, arc discharge, and electron emission were measured and exceeded the threshold. We conducted high-power tests at 3 kW in a standing wave to verify the performance of the fabricated power coupler. In this paper, we present the results of the high-power test with standing waves using movable shorts.

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Development of a 325 MHz β=0.12 superconducting single spoke cavity for China-ADS

Cited by 8 publications

References 2 publications

Low- to medium-β cavities for heavy ion acceleration

Low- to medium-β cavities for heavy ion acceleration

A preliminary quadrupole asymmetry study of a β=0.12 superconducting single spoke cavity

High power test of the power coupler for 325 MHz superconducting cavities with standing waves

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