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Insertion devices for BESSY II.

J Bahrdt1, A Gaupp, G Ingold

  • 1BESSYmbH, Lentzeallee 100, 14195 Berlin, Germany.

Journal of Synchrotron Radiation
|July 21, 2004
PubMed
Summary
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The BESSY II synchrotron will soon offer advanced insertion devices for scientific research. The U-49 undulator, a key component, has been successfully assembled and measured, meeting stringent performance requirements.

Area of Science:

  • Synchrotron Radiation Science
  • Particle Accelerator Technology

Background:

  • BESSY II is a high-brilliance synchrotron radiation source designed for 14 insertion devices.
  • Eight insertion devices are currently funded, with first light expected in January 1999.

Purpose of the Study:

  • To report on the assembly and magnetic measurement of the first insertion device, a U-49 undulator.
  • To detail the performance characteristics of the U-49 undulator, focusing on its suitability for scanning operations.

Main Methods:

  • Assembly of the U-49 undulator.
  • Magnetic measurement of the undulator's performance parameters.
  • Analysis of the endpole configuration and its impact on angular kick.

Main Results:

Related Experiment Videos

  • The U-49 undulator has been assembled and magnetically measured.
  • The root-mean-square (r.m.s.) phase error was determined to be 2 degrees.
  • An endpole configuration using coils with less than 64 amp-turns resulted in an angular kick smaller than +/-3 microradians over a 15-50 mm gap range.

Conclusions:

  • The U-49 undulator meets the tight tolerances required for parallel scanning operations with a monochromator.
  • The magnetic design ensures precise control of the electron beam, crucial for advanced synchrotron experiments.
  • The successful measurement of the U-49 undulator paves the way for its installation and use at BESSY II.