Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities

Q. S. Shu; J. Susta; G. F. Cheng; I. Phipps; R. Selim; J. Mast; P. Kneisel; G. Myneni; I. Ben-Zvi

doi:10.1109/PAC.2007.4441286

Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities

Q. S. Shu
, J. Susta
, G. F. Cheng
, I. Phipps
, R. Selim
, J. Mast
, P. Kneisel
, G. Myneni
, I. Ben-Zvi

Physics and Astronomy

AMAC International Inc.
Christopher Newport University
Thomas Jefferson National Accelerator Facility

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

The performance of superconducting RF cavities used in accelerators can be enhanced by detecting micro particles and inclusions which are the most serious source of performance degradation. These defects prevent the cavities from reaching the highest possible accelerating fields. We have developed a SQUID scanning system based on eddy current technique that allows the scanning of curved Nb samples. This SQUID scanning system successfully located Tantalum defects about 100 μm diameter in a flat Nb sample and was able to also locate the defects in a cylindrical surface sample. Most importantly, however, the system successfully located the defects on the backside of the flat sample and curved sample, both 3-mm thick. This system can be used for the inspection and detection of such defects during SRF cavity manufacturing.

Original language	English
Title of host publication	Proceedings of the IEEE Particle Accelerator Conference, PAC07
Pages	2469-2471
Number of pages	3
DOIs	https://doi.org/10.1109/PAC.2007.4441286
State	Published - 2007
Event	IEEE Particle Accelerator Conference, PAC07 - Albuquerque, NM, United States Duration: Jun 25 2007 → Jun 29 2007

Publication series

Name	Proceedings of the IEEE Particle Accelerator Conference

Conference

Conference	IEEE Particle Accelerator Conference, PAC07
Country/Territory	United States
City	Albuquerque, NM
Period	06/25/07 → 06/29/07

Access to Document

10.1109/PAC.2007.4441286

Cite this

Shu, Q. S., Susta, J., Cheng, G. F., Phipps, I., Selim, R., Mast, J., Kneisel, P., Myneni, G., & Ben-Zvi, I. (2007). Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities. In Proceedings of the IEEE Particle Accelerator Conference, PAC07 (pp. 2469-2471). Article 4441286 (Proceedings of the IEEE Particle Accelerator Conference). https://doi.org/10.1109/PAC.2007.4441286

@inproceedings{4e13eefc7af64fe2ab103d32636236a6,

title = "Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities",

abstract = "The performance of superconducting RF cavities used in accelerators can be enhanced by detecting micro particles and inclusions which are the most serious source of performance degradation. These defects prevent the cavities from reaching the highest possible accelerating fields. We have developed a SQUID scanning system based on eddy current technique that allows the scanning of curved Nb samples. This SQUID scanning system successfully located Tantalum defects about 100 μm diameter in a flat Nb sample and was able to also locate the defects in a cylindrical surface sample. Most importantly, however, the system successfully located the defects on the backside of the flat sample and curved sample, both 3-mm thick. This system can be used for the inspection and detection of such defects during SRF cavity manufacturing.",

author = "Shu, \{Q. S.\} and J. Susta and Cheng, \{G. F.\} and I. Phipps and R. Selim and J. Mast and P. Kneisel and G. Myneni and I. Ben-Zvi",

year = "2007",

doi = "10.1109/PAC.2007.4441286",

language = "English",

isbn = "1424409179",

series = "Proceedings of the IEEE Particle Accelerator Conference",

pages = "2469--2471",

booktitle = "Proceedings of the IEEE Particle Accelerator Conference, PAC07",

note = "IEEE Particle Accelerator Conference, PAC07 ; Conference date: 25-06-2007 Through 29-06-2007",

}

Shu, QS, Susta, J, Cheng, GF, Phipps, I, Selim, R, Mast, J, Kneisel, P, Myneni, G & Ben-Zvi, I 2007, Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities. in Proceedings of the IEEE Particle Accelerator Conference, PAC07., 4441286, Proceedings of the IEEE Particle Accelerator Conference, pp. 2469-2471, IEEE Particle Accelerator Conference, PAC07, Albuquerque, NM, United States, 06/25/07. https://doi.org/10.1109/PAC.2007.4441286

Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities. / Shu, Q. S.; Susta, J.; Cheng, G. F. et al.
Proceedings of the IEEE Particle Accelerator Conference, PAC07. 2007. p. 2469-2471 4441286 (Proceedings of the IEEE Particle Accelerator Conference).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Shu, Q. S.

AU - Susta, J.

AU - Cheng, G. F.

AU - Phipps, I.

AU - Selim, R.

AU - Mast, J.

AU - Kneisel, P.

AU - Myneni, G.

AU - Ben-Zvi, I.

PY - 2007

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N2 - The performance of superconducting RF cavities used in accelerators can be enhanced by detecting micro particles and inclusions which are the most serious source of performance degradation. These defects prevent the cavities from reaching the highest possible accelerating fields. We have developed a SQUID scanning system based on eddy current technique that allows the scanning of curved Nb samples. This SQUID scanning system successfully located Tantalum defects about 100 μm diameter in a flat Nb sample and was able to also locate the defects in a cylindrical surface sample. Most importantly, however, the system successfully located the defects on the backside of the flat sample and curved sample, both 3-mm thick. This system can be used for the inspection and detection of such defects during SRF cavity manufacturing.

AB - The performance of superconducting RF cavities used in accelerators can be enhanced by detecting micro particles and inclusions which are the most serious source of performance degradation. These defects prevent the cavities from reaching the highest possible accelerating fields. We have developed a SQUID scanning system based on eddy current technique that allows the scanning of curved Nb samples. This SQUID scanning system successfully located Tantalum defects about 100 μm diameter in a flat Nb sample and was able to also locate the defects in a cylindrical surface sample. Most importantly, however, the system successfully located the defects on the backside of the flat sample and curved sample, both 3-mm thick. This system can be used for the inspection and detection of such defects during SRF cavity manufacturing.

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ER -

Squid based non-destructive testing instrument of dished Nb sheets for SRF cavities

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