NDLI: First Results on a 500 MHz Superconducting Test Cavity for TRISTAN

Content Provider	Semantic Scholar
Author	Furuya, Takashi Hiramatsu, Shigenori Nakazato, Tetsuo Kato, Tatsuko Kneisel, Peter Kojima, Yoshifumi Takagi, Tadao
Copyright Year	1981
Abstract	First results on measurements of a 500 MHz superconducting cavity for TRISTAN are reported. The cavity of spherical shape has been built from 2.5 mm niobium sheet of 99.6 % purity by spinning, the main impurity being 1700 ppm of tantalum. Electropolishing and oxipolishing techniques have been applied for surface treatment. No high temperature degassing has been carried out. A Q-value of Qo = 3.4 × 109 and an accelerating gradient of Eacc = 4.1 MV/m have been obtained at 4.2 K. At 1.9 K the Q-value has been improved to 1.1 x 1010. Gas condensation and degassing effects on the cavity are also reported.
Starting Page	3225
Ending Page	3227
Page Count	3
File Format	PDF HTM / HTML
DOI	10.1143/JJAP.20.L145
Volume Number	28
Alternate Webpage(s)	http://epaper.kek.jp/p81/PDF/PAC1981_3225.PDF
Alternate Webpage(s)	https://doi.org/10.1143/JJAP.20.L145
Journal	IEEE Transactions on Nuclear Science
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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