Photons and magnetic fields: The use of synchrotron sources to study pairbreaking in superconductors

Xi, Xiaoxiang; Martin, C.; Hwang, Jungseek; Lobo, R S P M; Tashiro, Hiroshi; Zhang, H; Reitze, D. H.; Stanton, C. J.; Tanner, D. B.; Carr, G. L.

doi:10.1088/1742-6596/359/1/012010

Cited by 1 publication

(2 citation statements)

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“…One possible change is a non-reversible shift in T C , indicating permanent damage to the superconductor, which can result from factors like a change in oxygen stoichiometry, known to affect the critical temperature of REBCO [29]. Another possibility, rather than permanent sample damage, is the suppression of the superconducting state during irradiation due to photon-induced breaking of Cooper pairs (CP) [14,15]. In this case, an expected outcome is the broadening of the critical temperature transition width (∆T C ) compared to measurements without irradiation.…”

Section: In-situ Sr Impact On the Transition Temperaturementioning

confidence: 99%

“…There are studies in the scientific literature that use SRbased techniques to gain knowledge on the electronic structure of high-temperature superconductors (HTSs) and possible Cooper pairbreaking mechanisms [14][15][16]. In contrast, we are unaware of studies that have focused on the effect of SR on the superconducting properties of REBCO-CCs, namely critical temperature and surface impedance, at the functional level.…”

Section: Introductionmentioning

confidence: 99%

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Performance of high-temperature superconducting REBCO coated conductors under synchrotron irradiation for future circular colliders

Krkotić,

Traver,

Tagdulang

et al. 2023

Supercond. Sci. Technol.

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The influence of medium-to-high energy synchrotron radiation (∽10-100 keV) produced by the ALBA Synchrotron Light Source on state-of-the-art REBCO coated conductors has been studied to assess the feasibility of using high-temperature superconductors for the beam screen of future circular colliders. Long-term irradiation studies were conducted with ex-situ surface resistance testing by using a dielectric resonator. In addition, a cryogenic test system was established for in-situ measurements of the critical temperature and surface impedance of REBCO coated conductors during synchrotron irradiation, with intensities similar to or above those generated by proton beams circulating in the vacuum chamber in the future circular collider hadron-hadron design. It is shown that the synchrotron radiation impact does not introduce any macroscopic defects that permanently alter the critical temperature or surface impedance of REBCO coated conductors. However, the most significant effect of synchrotron radiation is a transient increase in the REBCO’s surface impedance. This effect is likely caused by heat, as the material returns to its original impedance values once the radiation exposure stops. The correlation between the time structure of the synchrotron radiation and the possibility of suppressing the Cooper pairing mechanism is also discussed.

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Section: In-situ Sr Impact On the Transition Temperaturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%