Test of an Electromagnetic Shimming Concept for Superconducting Undulators

Elena Mashkina, Andreas Grau, Cristian Boffo, Markus Borlein, Tilo Baumbach, Sara Casalbuoni, Michael Hagelstein, Robert Rossmanith, Erhard Steffens, Wolfgang Walter

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)


Accurate magnetic field measurements are a prerequisite for the characterization and optimization of undulators. At the synchrotron light source ANKA there is an ongoing R D program for superconducting insertion devices. Within this program a test stand for precise magnetic field measurements of superconductive coils was designed, built and installed at the Research Center Karlsruhe. Comprehensive magnetic measurements are performed to confirm the magnet design and to detect or correct field imperfections resulting from the manufacturing process. The magnetic field is measured along a fixed direction by Hall probes with a positioning precision of 3 mu m. A NbTi undulator prototype with local correction coils was built to verify the performance of the superconductor and the shimming concept. In this contribution we describe the measuring test station and preliminary tests results including the efficiency of the shimming concept.
Original languageEnglish
Pages (from-to)2329 - 2332
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number3
Publication statusPublished - 2009
Externally publishedYes

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