| Title |
Pulsed Wire Measurement of 20 mm Period Hybrid Undulator and Effects of Dispersion |
| Authors |
- S.M. Khan, G. Mishra
Devi Ahilya University, Indore, India
- M. Gehlot
DESY, Hamburg, Germany
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| Abstract |
In the pulsed wire method, a thin wire is stretched along the undulator axis with a sensor located near the undulator end. When a current flows through the wire, the Lorentz force on the wire sets up a travelling wave that is picked up by a sensor. Sensor output v. time gives the field integral v. position along the undulator length. We investigate pulsed wire measurements of field integrals and phase error of a 20 mm-period, 500 mm-long undulator and discuss variation in performance with Hall probe data, without any dispersion correction algorithm. Dispersion in the wire introduces dispersion corrected pulse lengths for the field integral measurements. Two field integrals of the undulator were measured with an accuracy close to 2 Gcm and 2 Gcm² with the Hall probe result. The contributions of dispersion to the phase error of the undulator are analyzed. The dispersion assisted phase advance in the undulator in the pulsed wire is measured with a higher slope in comparison to the Hall probe data. Dispersion limited optical phase growth along the undulator length causes period length fluctuations and yields a discrepancy in the phase error computation in comparison to Hall probe data.
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| Paper |
download WE4P38.PDF [0.308 MB / 3 pages] |
| Cite |
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| Conference |
FLS2023 |
| Series |
ICFA Advanced Beam Dynamics Workshop (67th) |
| Location |
Luzern, Switzerland |
| Date |
27 August-01 September 2023 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Hans-Heinrich Braun (PSI, Villigen, Switzerland); Jan Chrin (PSI, Villigen, Switzerland); Romain Ganter (PSI, Villigen, Switzerland); Nicole Hiller (PSI, Villigen, Switzerland); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-224-0 |
| Online ISSN |
2673-7035 |
| Received |
22 August 2023 |
| Revised |
22 August 2023 |
| Accepted |
31 August 2023 |
| Issued |
02 December 2023 |
| DOI |
doi:10.18429/JACoW-FLS2023-WE4P38 |
| Pages |
218-220 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 4.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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