Final Technical Report

Technical Report · Tue Sep 09 00:00:00 EDT 2014

DOI:https://doi.org/10.2172/1154950· OSTI ID:1154950

Xi, Xiaoxing ^[1]

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1. Temple Univ., Philadelphia, PA (United States)

The objective of this project is to develop a MgB₂ superconducting RF (SRF) cavity technology. Compared to the currently-used SRF material niobium, MgB₂ has a much higher T_c of 40 K, a lower residual resistivity (< 0.1 µΩcm), and a higher thermodynamic critical field Hc. SRF cavities with MgB2 coatings have the potentials for higher Q, higher gradient, and higher operation temperatures. A MgB₂ SRF technology can significantly reduce the operating costs of particle accelerators when these potentials are realized. In this project, we have made significant progresses in the deposition of large-area (2” diameter) MgB₂ films for RF characterizations, deposition of MgB₂ films on metal substrates including Nb, Mo, Ta, and stainless steel, enhancement of Hc1 with decreasing MgB₂ film thickness, fabrication and characterization of MgB₂/MgO multilayers, and deposition of MgB2 films of excellent superconducting properties on the wall of a 6-GHz RF cavity. These results have laid foundation for a MgB₂ superconducting SRF cavity technology.

• Research Organization: Temple Univ., Philadelphia, PA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: SC0004410
• OSTI ID: 1154950
• Report Number(s): DOE-TEMPLE-04410
• Country of Publication: United States
• Language: English

Related Subjects

Superconducting Radio Frequency Cavities