Fabrication and Experimental Study of Prototype NdFeB Helical Undulators

Nezah Balal; Eberhard Bamberg; Vladimir L. Bratman; Eyal Magory

doi:10.1109/TED.2023.3315250

Fabrication and Experimental Study of Prototype NdFeB Helical Undulators

Nezah Balal, Eberhard Bamberg, Vladimir L. Bratman, Eyal Magory

Department of Electrical and Electronics Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

An experiment with short prototypes of helical undulators, comprised of longitudinally magnetized helices made from a single piece of a rare-earth magnet, is described. Wire electrical discharge machining (WEDM) in combination with a flat tool and the rotary movement of the workpiece made it possible to achieve high precision in the manufacture of NdFeB helices. An assembly of two oppositely longitudinally magnetized helices with a period of 20 mm and a relatively large inner diameter of 8 mm creates a field of 0.53 T on the axis of the system, which ensures the value of the undulator parameter K close to unity. According to the calculation, Halbach-type helical micro-undulators with periods of (3-6) mm of four helices can provide a field of 1 T and K = 0.28-0.6 at the axis.

Original language	English
Pages (from-to)	5911-5915
Number of pages	5
Journal	IEEE Transactions on Electron Devices
Volume	70
Issue number	11
DOIs	https://doi.org/10.1109/TED.2023.3315250
State	Published - 1 Nov 2023

Keywords

Accelerator magnets
free electron lasers
magnetic fields
magnetization processes
undulators

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10.1109/TED.2023.3315250

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abstract = "An experiment with short prototypes of helical undulators, comprised of longitudinally magnetized helices made from a single piece of a rare-earth magnet, is described. Wire electrical discharge machining (WEDM) in combination with a flat tool and the rotary movement of the workpiece made it possible to achieve high precision in the manufacture of NdFeB helices. An assembly of two oppositely longitudinally magnetized helices with a period of 20 mm and a relatively large inner diameter of 8 mm creates a field of 0.53 T on the axis of the system, which ensures the value of the undulator parameter K close to unity. According to the calculation, Halbach-type helical micro-undulators with periods of (3-6) mm of four helices can provide a field of 1 T and K = 0.28-0.6 at the axis.",

keywords = "Accelerator magnets, free electron lasers, magnetic fields, magnetization processes, undulators",

author = "Nezah Balal and Eberhard Bamberg and Bratman, {Vladimir L.} and Eyal Magory",

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AU - Magory, Eyal

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Fabrication and Experimental Study of Prototype NdFeB Helical Undulators

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