NDLI: Field Trimming by Iron Pieces and Coils in a Superconducting Undulator

Content Provider	IEEE Xplore Digital Library
Author	Jyh-Chyuan Jan Ching-Shiang Hwang Fu-Yuen Lin Cheng-Hsiang Chang Pei-Hua Lin Chunjarean, S. Chien-Te Chen
Copyright Year	2002
Abstract	Trim-iron-pieces and trim-coils were used to correct the magnetic field error in a superconducting undulator with a magnet period of 15 mm. The main-coils were wound with NbTi wires of 0.77 times 0.51 mm² rectangular cross section. The entire iron pole array was electrically insulated from the main-coils using Teflon to avoid degradation of the superconducting wire when the main-coils were trained to a large current. The trim-coils were wound with NbTi wires of 0.33 mm diameter. The trim-iron-pieces and trim-coils were mounted directly on the iron pole. The electric current of these trim-coils were generated by a single power supply with a constant voltage. A variable resistor and two golden-case resistors were connected in parallel to adjust the current that passed through each trim-coil. In this work, three trim-iron-pieces and one trim-coil were fabricated and mounted on each of the upper and lower arrays, and their effect on correcting the magnetic field error of the undulator is measured and compared to a model simulation.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1332
Ending Page	1335
Page Count	4
File Size	1225825
File Format	PDF
ISSN	10518223
Volume Number	19
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting coils Iron Undulators Superconducting filaments and wires Superconducting magnets Error correction Wounds Niobium compounds Titanium compounds Resistors trim-iron-pieces Magnetic field measurement NbTi wire superconducting undulator trim-coil
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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