RRR characteristics of niobium along the welding directions for SRF cavities

Jung, Yoochul; Joung, Mijoung

doi:10.3938/jkps.69.984

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, EBW has been successfully used for welding pure Nb to the resonant cavities of modern accelerators [13,14]. It has been proven that the superconducting properties of Nb materials are not degraded by the EBW process [13][14][15][16][17][18]. However, there are no reports of Nb superconducting joints being fabricated using the EBW method.…”

Section: Introductionmentioning

confidence: 99%

A novel Nb superconducting joint with ultralow resistance fabricated by electron beam welding method for superconducting gravimeter

Zhang

Xing

Cui

et al. 2021

Supercond. Sci. Technol.

View full text Add to dashboard Cite

This paper presents a novel Nb superconducting joint with an ultralow resistance of 7.9 × 10−16 Ω, fabricated using the electron beam welding (EBW) method. After the EBW process, the two Nb filaments formed a single joint with a much larger grain size and smaller grain misorientation. More importantly, the resistance of the EBW Nb joint was nearly one magnitude lower than that of most conventional pressing joint. The ultralow resistance is essential for superconducting gravimeters, which require an extremely low drift rate. The EBW Nb joint allowed the superconducting gravimeter to have a much better performance when applied in the field of structural geology, geodesy, microgravity, and metrology. We believe that the EBW method could be one of the most promising joint fabrication methods for achieving maximum stability (less than 1 μgal yr−1).

show abstract