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APS Insertion Devices: Recent Developments and Results
1Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, APS-401, Argonne, IL 60439, USA.
Journal of Synchrotron Radiation
|July 21, 2004
Summary
The Advanced Photon Source (APS) has 23 installed insertion devices (IDs), including undulators and wigglers. Magnetic tuning and spectral diagnostics confirm excellent agreement between calculated and measured results for these critical synchrotron radiation sources.
Area of Science:
- Synchrotron Radiation Science
- Particle Accelerator Technology
- Materials Science
Background:
- The Advanced Photon Source (APS) utilizes insertion devices (IDs) to generate synchrotron radiation.
- A significant number of IDs are installed on the storage ring, requiring precise magnetic characterization.
Purpose of the Study:
- To detail the magnetic characterization and spectral performance of the APS insertion devices.
- To validate the magnetic tuning and spectral diagnostics of various ID types.
Main Methods:
- Magnetic measurements and tuning of 23 insertion devices (IDs).
- Development and application of special shimming techniques for magnetic field correction.
- Measurement of closed-orbit distortion and spectral properties (flux, brilliance, polarization).
Main Results:
- All installed IDs were magnetically measured and tuned, with most undergoing final magnetic tuning.
- Measurements of closed-orbit distortion showed good agreement with magnetic measurements.
- Spectral diagnostics confirmed excellent agreement between calculated and measured absolute spectral flux, brilliance, and polarization.
Conclusions:
- The magnetic tuning and spectral diagnostics of APS insertion devices are highly effective.
- The performance of the installed IDs meets design specifications, ensuring high-quality synchrotron radiation.
- Ongoing studies will assess ID sensitivity to radiation exposure.