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Title: Coupling impedance of an in-vacuum undulator. Measurement, simulation, and analytical estimation

Abstract

One of the important issues of the in-vacuum undulator design is the coupling impedance of the vacuum chamber, which includes tapered transitions with variable gap size. In order to get complete and reliable information on the impedance, analytical estimate, numerical simulations and beam-based measurements have been performed at Diamond Light Source, a forthcoming upgrade of which includes introducing additional insertion device (ID) straights. Moreover, the impedance of an already existing ID vessel geometrically similar to the new one has been measured using the orbit bump method. The measurement results in comparison with analytical estimations and numerical simulations are discussed in this paper.

Authors:
 [1];  [2];  [1];  [1];  [3]
  1. Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Science and Technology Facilities Council (STFC), Harwell Campus, Oxford (United Kingdom). Diamond Light Source, Ltd.; Univ. of Oxford (United Kingdom)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1166720
Report Number(s):
BNL-106248-2014-JA
Journal ID: ISSN 2469-9888; R&D Project: LS001
DOE Contract Number:
AC02-98CH10886
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Accelerators and Beams (Online); Journal Volume: 17; Journal Issue: 7
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Simaluk, Victor, Blednykh, Alexei, Fielder, Richard, Rehm, Guenther, and Bartolini, Riccardo. Coupling impedance of an in-vacuum undulator. Measurement, simulation, and analytical estimation. United States: N. p., 2014. Web. doi:10.1103/PhysRevSTAB.17.074402.
Simaluk, Victor, Blednykh, Alexei, Fielder, Richard, Rehm, Guenther, & Bartolini, Riccardo. Coupling impedance of an in-vacuum undulator. Measurement, simulation, and analytical estimation. United States. doi:10.1103/PhysRevSTAB.17.074402.
Simaluk, Victor, Blednykh, Alexei, Fielder, Richard, Rehm, Guenther, and Bartolini, Riccardo. Fri . "Coupling impedance of an in-vacuum undulator. Measurement, simulation, and analytical estimation". United States. doi:10.1103/PhysRevSTAB.17.074402.
@article{osti_1166720,
title = {Coupling impedance of an in-vacuum undulator. Measurement, simulation, and analytical estimation},
author = {Simaluk, Victor and Blednykh, Alexei and Fielder, Richard and Rehm, Guenther and Bartolini, Riccardo},
abstractNote = {One of the important issues of the in-vacuum undulator design is the coupling impedance of the vacuum chamber, which includes tapered transitions with variable gap size. In order to get complete and reliable information on the impedance, analytical estimate, numerical simulations and beam-based measurements have been performed at Diamond Light Source, a forthcoming upgrade of which includes introducing additional insertion device (ID) straights. Moreover, the impedance of an already existing ID vessel geometrically similar to the new one has been measured using the orbit bump method. The measurement results in comparison with analytical estimations and numerical simulations are discussed in this paper.},
doi = {10.1103/PhysRevSTAB.17.074402},
journal = {Physical Review Accelerators and Beams (Online)},
number = 7,
volume = 17,
place = {United States},
year = {Fri Jul 25 00:00:00 EDT 2014},
month = {Fri Jul 25 00:00:00 EDT 2014}
}
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