1–6 Jun 2025
Taipei International Convention Center (TICC)
Asia/Taipei timezone

Helical undulators assembled from magnetized ring sectors

TUPS089
3 Jun 2025, 16:00
2h
Exhibiton Hall A _Salmon (TWTC)

Exhibiton Hall A _Salmon

TWTC

Poster Presentation MC2.T15 Undulators and Wigglers Tuesday Poster Session

Speaker

Nezah Balal (Ariel University)

Description

Undulators assembled from quasi-helices consisting of readily available magnetized ring rare-earth sectors are proposed. "Radially" magnetized sectors create a stronger field on the axis than longitudinally magnetized ones. The field value weakly depends on the number of sectors per undulator period. An experimentally studied prototype Halbach-type helical undulator of "radially" and longitudinally magnetized quasi-helices consisting of ring NdFeB sectors with a period of 2 cm and a comparatively large inner diameter of 8 mm provides a field of about 0.6 T on the axis. By reducing the inner diameter to 5 mm, it is possible to obtain a field twice as large. When assembling such an undulator, it is convenient, while maintaining the positions of all ring sectors, to use a division of the undulator not into quasi-helices, but into cylindrical sectors shifted along the axis and rotated relative to each other. Permanent undulators from ring sectors can provide a higher velocity of transverse electron oscillations than planar ones, and therefore seem promising for increasing the efficiency of FELs in various frequency ranges.

Region represented Asia

Author

Nezah Balal (Ariel University)

Co-authors

Eyal Magory (Jerusalem College of Technology) Vladimir Bratman (Ariel University) Ahiya Steiner (Ariel University Center of Samaria)

Presentation materials

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