Report/Journal Article PUBDB-2019-02509

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First Attempts in Automated Defect Recognition in Superconducting Radio-Frequency Cavities



2019
Inst. of Physics London

Journal of Instrumentation 14(3), P06021 () [10.1088/1748-0221/14/06/P06021]
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Report No.: DESY-19-009; arXiv:1906.08055

Abstract: The inner surface of superconducting cavities plays a crucial role to achieve highest accelerating fields. The industrial fabrication of cavities for the European X-Ray Free Electron Laser (EXFEL) and the International Linear Collider (ILC) HiGrade Research Project allowed for an investigation of this interplay with a large sample on different cavities undergoing a standardized procedure. For the serial inspection of the inner surface, the optical inspection robot OBACHT was constructed and to analyze the large amount of data, represented in the images of the inner surface, an image processing and analysis code was developed. New variables to describe the cavity surface were obtained. Two approaches using these variables and images to automatically detect defects has been implemented and tested. In addition, a decision-tree based approach of classifying defect free surfaces regarding their accelerating performance was tested and found to be physically valid.

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Note: * Brief entry *arXiv admin note: text overlap with arXiv:1704.06080 ; publication: JINST 14 06 (2019) P06021 ; ;

Contributing Institute(s):
  1. Uni Hamburg / Experimentalphysik (UNI/EXP)
  2. Forschung Linear Accelerator (FLA)
Research Program(s):
  1. 631 - Accelerator R & D (POF3-631) (POF3-631)
Experiment(s):
  1. TESLA-Test-Facility

Appears in the scientific report 2019
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Medline ; Creative Commons Attribution CC BY 4.0 ; OpenAccess ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NationallizenzNationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection
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 Record created 2019-06-19, last modified 2025-07-16


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