Ultrahigh accelerating gradient and quality factor of CEPC 650 MHz superconducting radio-frequency cavity

Sha, Peng; Pan, Weimin; Jin, Song; Zhai, Jiyuan; Mi, Zhenghui; Liu, Bai-Qi; Dong, Cao; He, Feisi; Ge, Rui; Sun, Liangrui; Zheng, Shiao; Ye, Ling-Xi

doi:10.1007/s41365-022-01109-8

Cited by 11 publications

(4 citation statements)

References 29 publications

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“…The recoil mass technique is used to find the Higgs boson's label from the Z boson's visible decay. Thus, further selection and labeling of the Higgs boson decay products can achieve high signal efficiency, while the main background will come from the SM decays of the Higgs boson, which were introduced in [2].…”

Section: New Physics Study On Cepcmentioning

confidence: 99%

“…It demonstrates the mass difference between the high-brightness LHC and the toroidal positron collider. Table 1 shows the current and predicted limits of the Higgs boson heterodyne decay modes for the 5.6 ab -1 integrated luminosity of HL-LHC and CEPC, as calculated from [2]. In the first column seen, the particles in the same brackets indicate the decay products of the intermediate resonances.…”

Section: New Physics Study On Cepcmentioning

confidence: 99%

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Future physics prospects with CEPC and HL-LHC synergy

2023

TNS

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After constructing the Circular Electron Positron Collider (CEPC) and the High-Luminosity Large Hadron Collider (HL-LHC), particle physics experiments will reach a new mass region with more incredible energy. Both types of colliders have the unique duty of searching for new particles or estimating the coupling constants of the reactions based on their different structures, providing a different focus. This presentation will discuss and cover the regions of CEPC and HL-LHC to show their complementary functions. The CEPC can answer the Higgs particle, whether it is a composite particle, how it contributes to the dark matter mass, and whether its field provides enough matter mass for the universe. It can generally provide detections below 10 TeV, leading to possible new theories. For the HL-LHC, the upgraded HL-LHC has a higher luminosity and data acquisition capability, ten times higher than predicted. It is expected to produce 15 million Higgs particles annually, five times more than the LHC. The large number of collision events provides more opportunities to measure the characteristics of the Higgs particles.

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Section: New Physics Study On Cepcmentioning

confidence: 99%

Section: New Physics Study On Cepcmentioning

confidence: 99%

Future physics prospects with CEPC and HL-LHC synergy

2023

TNS

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“…Currently, most SRF cavities utilize pure niobium as material [8,9]. With advancements in manufacturing and surface treatment technologies, the performance of the niobium cavity has approached its theoretical limits [10][11][12][13]. Consequently, there is a growing focus on exploring new generations of SRF materials.…”

Section: Introductionmentioning

confidence: 99%

First Results of Nb3Sn Coated Cavity by Vapor Diffusion Method at SARI

Chen,

Zong,

Wang

et al. 2024

Coatings

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Nb3Sn is emerging as one of the focal points in superconducting radio frequency (SRF) research, owing to its excellent superconducting properties. These properties hold significant possibilities for cost reduction and the miniaturization of accelerators. In this paper, we report the recent efforts of the Shanghai Advanced Research Institute (SARI) in fabricating high-performance Nb3Sn superconducting cavities using the vapor diffusion method. This includes the construction of a Nb3Sn coating system with dual evaporators and the test results of 1.3 GHz single-cell coated cavities. The coated samples were characterized, and the growth state of the Nb3Sn films was analyzed. The first coated superconducting cavity was tested at both 4.4 K and 2 K, with different cooldown rates passing through the Nb3Sn critical temperatures. The causes of Sn droplet spot defect formation on the surface of the first cavity were analyzed, and such defects were eliminated in the coating of the second cavity by controlling the evaporation rate. This study provides a reference for the preparation of high-performance Nb3Sn-coated cavities using the vapor diffusion method, including the setup of the coating system, the comprehension of the vapor diffusion process, and the test conditions.

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“…The SRF cavity, made of superconductors (Nb, Nb3Sn, etc), is the key component of superconducting accelerators, with significant roles in colliders, synchrotron light sources, neutron sources and free electron lasers [1][2][3][4][5]. Each SRF cavity must receive RF test at low temperature (< 4.2 K), which is usually called vertical test.…”

Section: Introductionmentioning

confidence: 99%

Development of vertical test stand for SRF cavities at PAPS

Ye,

Sha,

et al. 2024

J. Inst.

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The vertical test stand (VTS) plays a crucial role in evaluating the performance of superconducting radio-frequency (SRF) cavities. The VTS at the Platform of Advanced Photon Source Technology R&D (PAPS) has been developed by the Institute of High Energy Physics, Chinese Academy of Sciences (IHEP). In this paper, the digitalization (based on Field Programmable Gate Array, FPGA) and integration functionalities of VTS was carried out, which simplified the vertical test and improved efficiency greatly. Several vertical tests have been conducted at this upgraded VTS successfully, which adopted digital self-excited loop (SEL) and Experimental Physics and Industrial Control System (EPICS).

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Ultrahigh accelerating gradient and quality factor of CEPC 650 MHz superconducting radio-frequency cavity

Cited by 11 publications

References 29 publications

Future physics prospects with CEPC and HL-LHC synergy

Future physics prospects with CEPC and HL-LHC synergy

First Results of Nb3Sn Coated Cavity by Vapor Diffusion Method at SARI

Development of vertical test stand for SRF cavities at PAPS

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