Undulator tunability and synchrotron ring energy
Both the photon energy of an undulator as well as its tunability are determined by the period, lambda, of the device, the magnetic gap, G (which is larger than the minimum aperture required for injection and operation of the storage ring), and the storage ring energy, E/sub R/. Given the photon energy, E/sub p/, the above parameters ultimately define the limits of operation or tunability of the undulator. In general, the larger the tunability range, the more useful the device. Therefore, for a given required maximum photon energy, it is desirable to find the operating conditions and device parameters which result in the largest tunability interval possible. This paper investigates the question of undulator tunability with emphasis on the role of the ring energy in order to find the smallest E/sub R/ consistent with the desired tunability interval and photon energy. As a guideline, we have included a preliminary criteria, concerning the tunability requirements for the Advanced Photon Source (APS) to be built at Argonne. The analysis is aimed at X-ray undulator sources on the APS but is applicable to any storage ring.
- Research Organization:
- Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6080766
- Report Number(s):
- CONF-870302-216; ON: DE87011506; TRN: 87-030494
- Resource Relation:
- Conference: Particle accelerator conference, Washington, DC, USA, 16 Mar 1987; Other Information: Paper copy only, copy does not permit microfiche production
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photon energy tunability of advanced photon source undulators
Spectral character of optimized undulator insertion devices for the Synchrotron X-ray Source at Argonne