publication . Preprint . Article . Other literature type . 2012

Flux pinning characteristics in cylindrical niobium samples used for superconducting radio frequency cavity fabrication

Pashupati Dhakal;
Open Access English
  • Published: 23 Apr 2012
Abstract
We present the results of from DC magnetization and penetration depth measurements of cylindrical bulk large-grain (LG) and fine-grain (FG) niobium samples used for the fabrication of superconducting radio frequency (SRF) cavities. The surface treatment consisted of electropolishing and low temperature baking as they are typically applied to SRF cavities. The magnetization data were fitted using a modified critical state model. The critical current density Jc and pinning force Fp are calculated from the magnetization data and their temperature dependence and field dependence are presented. The LG samples have lower critical current density and pinning force dens...
Subjects
arXiv: Physics::Accelerator Physics
free text keywords: Physics - Accelerator Physics, Condensed Matter - Superconductivity, Electrical and Electronic Engineering, Materials Chemistry, Condensed Matter Physics, Metals and Alloys, Ceramics and Composites, Physics, Critical point (thermodynamics), Optics, business.industry, business, Niobium, chemistry.chemical_element, chemistry, Superconducting radio frequency, Fabrication, Penetration depth, Magnetization, Flux pinning, Pinning force
28 references, page 1 of 2

[1] Padamsee H 2008 RF Superconductivity Science,Technology and Applications (Weinheim: WileyVCH)

[2] Kneisel P, Myneni G R, Ciovati G, Sekutowicz J and Carneiro T 2006 Development of large grain/single crystal niobium cavity technology at Jefferson Lab Proc. of Int. Niobium Workshop on Single Crystal - Large Grain Technology (Araxá, Brasil, October 30 - November 1 2006) (AIP Conf. Proc. vol 927) ed G Myneni et al (Melville: American Institute of Physics) pp 84-97. [OpenAIRE]

[3] Kako E et al 1997 Cavity performances in the 1.3 GHz Saclay / KEK Nb Cavities Proc. of the 8th Workshop on RF Superconductivity (Abano Terme, Italy, 6-10 October 1997) ed V Palmieri (INFN Report LNL-INFN 133/98) pp 491-502

[4] Gurevich A and Ciovati G 2008 Phys. Rev. B 77 104501

[5] Ciovati G and Gurevich 2008 Phys. Rev. Special Topics - Accelerators and Beams (PRST-AB) 11 122001

[6] Gurevich A 2006 Physica C 441 38-43

[7] Bean C 1962 Phys. Rev. Lett. 8 250-53

[8] Bean C 1964 Rev. Mod. Phys. 36 31-39

[9] Kim Y B, Hempstead C F and Strnad A R 1962 Phys. Rev. Lett. 9 306-09

[10] Matsuhita T and Yamafuji K 1979 J. Phys. Soc. Japan. 46 764-71

[11] Dew-Hughes D 1974 Philos. Mag. 30 293

[12] Brandt E H 1995 Rep. Prog. Phys. 58 1465-1594

[13] Matsushita T 2007 Flux Pinning in Superconductors (Berlin: Springer-Verlag) pp 66-76

[14] Ciovati G, Kneisel P, Myneni G R, Morrone M, Bundy R, Clemens B, Elliott T, Slack G, Turlington L and Mondal J 2007 A coaxial TE011 cavity and a system to measure DC and RF properties of superconductors Proc. of the 13th Workshop on RF Superconductivity (Beijing, China, 14-19 October 2007) ed J K Hao et al (Beijing: Peking University) pp 98-102

[15] Dhakal P, Ciovati G, Kneisel P and Myneni G R 2011 Superconducting DC and RF properties of ingot niobium Proc. of the 15th Int. Conf. on RF Superconductivity (Chicago, USA, 25-29 July 2011) Preprint THPO057

28 references, page 1 of 2
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