Large Grain Superconducting RF Cavities at DESY

Journal Article · Thu Aug 09 04:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2770685· OSTI ID:21067372

Singer, W; Brinkmann, A; Ermakov, A; Iversen, J; Kreps, G; Matheisen, A; Proch, D; Reschke, D; Singer, X; Spiwek, M; Wen, H; Brokmeier, H G ^[1]

---

1. DESY, Notkestrasse 85, D-22607 Hamburg (Germany)

The DESY R and D program on cavities fabricated from large grain niobium explores the potential of this material for the production of approx. 1000 nine-cell cavities for the European XFEL. The program investigates basic material properties, comparing large grain material to standard sheet niobium, as well as fabrication and preparation aspects. Several single-cell cavities of TESLA shape have been fabricated from large grain niobium. A gradient up to 41 MV/m at Q0 = 1.4{center_dot}1010 (TB = 2K) was measured after electropolishing. The first three large grain nine-cell cavities worldwide have been produced under contract of DESY with ACCEL Instruments Co. The first tests have shown that all three cavities reach an accelerating gradient up to 30 MV/m after BCP (Buffered Chemical Polishing) treatment, what exceeds the XFEL requirements for RF test in the vertical cryostat.

• OSTI ID: 21067372
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 927; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL POLISHING
DESY
ELECTROPOLISHING
FABRICATION
FREE ELECTRON LASERS
GRAIN SIZE
NIOBIUM
SHEETS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTORS