Phase errors and predicted spectral performance of a prototype undulator

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146509· OSTI ID:6580074

Dejus, R J; Vasserman, I; Moog, E R; Gluskin, E ^[1]

---

1. Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave, Argonne, Illinois 60439 (United States)

A prototype undulator (3.3 cm period, permanent-magnet hybrid device) has been used to study different magnetic end configurations and shimming techniques for straightening the beam trajectory. Field distributions obtained by Hall-probe measurements were analyzed in terms of trajectory, phase errors, and on-axis brightness for the purpose of correlating predicted spectral intensity with the calculated phase errors. An rms phase error of less than 3[degree] is found and 87% of the ideal value of the on-axis brightness for the third harmonic (nominal gap is 11.5 mm and derived effective [ital K] is 2.25) is predicted. The gap dependence of the phase errors and spectral brightness was also analyzed and it was found that the rms phase error remains small at all gap settings.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6580074
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:2; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
ADVANCED PHOTON SOURCE
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ENERGY SPECTRA
EQUIPMENT
HARMONICS
MAGNETIC FIELD CONFIGURATIONS
MAGNETS
OSCILLATIONS
PERFORMANCE
PHASE STABILITY
RADIATION SOURCES
SPECTRA
STABILITY
SYNCHROTRON RADIATION SOURCES
TRAJECTORIES
WIGGLER MAGNETS