Design of a Balloon-Shaped Superconducting Single Spoke Resonator

Jin, Hyuk; Yoon, Joon Shik; S.W.Jang,; Kim, Kyung‐Ryul; Park, Seong Hee; Kim, Eun−San

doi:10.3938/jkps.75.117

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…Thus, it is obvious that the MP results in RF breakdown and finally limits the device performance. In general, the MP-possible areas are confined in small regions in the device structure and can be mitigated by geometrical design optimization [12]. The MP barriers restricting power supply to the devices have been also overcome by RF conditioning during several to tens of hours [13].…”

Section: Introductionmentioning

confidence: 99%

Beam-induced electron multipacting with mode resonance in a vacuum chamber

Cha¹,

Jauregui²,

Grau³

et al. 2021

J. Inst.

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Some vacuum chambers in particle accelerators perform a waveguide- or resonator-like behavior due to their unique geometries. Electron multipacting caused by such a structural property might be able to overwhelm the classical beam-induced multipacting. This article shows that the wakefields of particle beams could stimulate the resonant modes of a vacuum chamber with a near-rectangular waveguide shape and accordingly induce much stronger electron avalanche in the chamber. Especially, it has been believed that the multipacting is responsible for pressure rise in a vacuum chamber, where energetic secondary electrons with growing numbers collide with gas particles at the chamber wall. Based on numerical simulations, the electron multipacting mechanism with the mode resonance is proposed, which can explain the significant pressure variation measured in our cryogenic vacuum chamber.

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Section: Introductionmentioning

confidence: 99%

Beam-induced electron multipacting with mode resonance in a vacuum chamber

Cha¹,

Jauregui²,

Grau³

et al. 2021

J. Inst.

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“…Until now, several forms for parametrized phase shift model are known [1]. There has been a great deal of efforts [2][3][4][5][6][7] in describing the heavy-ion elastic scattering within the framework of parametrized phase shift model.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the elastic data of 1503 MeV 16 O scatterings on 12 C, 40 Ca, 90 Zr, and 208 Pb target nuclei and 12 C + 12 C system at 360 and 1016 MeV have been analyzed [2] successfully by using phase shift based on McIntyre parametrization [8]. Further, a systematic study of elastic scattering for the 12 C + 12 C system in the range * E-mail: yjkim@jejunu.ac.kr E lab = 240 to 2400 MeV has been done [6] with the parametrized phase shift model.…”

Section: Introductionmentioning

confidence: 99%

Phase Shift Analysis and the Optical Potential Obtained by Using Inversion for $alpha$ + $^{58}$Ni Elastic Scattering

Kim¹,

Lee²

2018

New Physics: Sae Mulli

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The data for the elastic scattering of 288, 340, and 386 MeV alpha particles on 58 Ni was analyzed using the McIntyre parametrization for the phase shift. The calculated differential cross sections for the α + 58 Ni system fit the experimental data fairly well. The diffractive oscillatory structures observed in the angular distributions were explained as being due to the strong interference between the near-side and the far-side scattering amplitudes. The corresponding optical potentials were predicted by using the inversion procedure of the McIntyre phase shift. The inversion potentials were then compared with the available ones obtained from optical model analyses.

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