Improving the magnet alignment of undulator systems by laser interferometer

Journal of Synchrotron Radiation

G. Mishra¹  Saif Mohd Khan¹ 

[1] Insertion Device and Laser Instrumentation Laboratory (IDLI), Devi Ahilya Vishwavidyalay, Indore, Madhya Pradesh 452001, India;

关键词: undulator;    misalignment;    laser interferometer;   

DOI  :  10.1107/S1600577522001199

来源: DOAJ

【 摘 要 】

The issue of intrinsic-type misalignment errors arising from angular offsets between magnets in an undulator is addressed. A random tilt of the magnets or poles generates undesirable magnetic field components in both transverse and longitudinal directions and gives rise to errors in period lengths and amplitudes. These localized errors are carried to the entire undulator segments and are a cause of concern for precision field integral and phase error estimates. A laser interferometer has been designed to read the offsets and to fix the magnets to minimize the offsets.

【 授权许可】

Unknown