Undulators at HiSOR - a compact racetrack-type ring

Area of Science:

• Physics
• Materials Science
• Chemistry

Background:

• The Hiroshima Synchrotron Radiation Center (HSRC) developed the compact HiSOR (Hiroshima Synchrotron Radiation) storage ring.
• The ring was designed for synchrotron radiation research spanning VUV to X-ray energies (up to 5 keV).
• Design constraints included limited size and cost, necessitating innovative solutions for high performance.

Purpose of the Study:

• To construct a compact, cost-effective storage ring for versatile synchrotron radiation research.
• To incorporate advanced insertion devices for generating specific types of radiation.
• To enable the production of tunable polarized light for advanced scientific investigations.

Main Methods:

• Construction of a 700 MeV compact racetrack-type storage ring (HiSOR).
• Implementation of a high magnetic field (2.7 T) dipole magnet system.
• Installation of a linear undulator and a novel helical/linear undulator in straight sections.

Main Results:

• The helical/linear undulator allows selection of polarization (circular, elliptical, linear) by adjusting magnet array positions.
• Achieved nearly perfect circular polarization (4-40 eV) in helical configuration.
• Produced linearly polarized light (3-300 eV) in linear configuration.

Conclusions:

• The HiSOR storage ring and its novel undulator provide a versatile platform for synchrotron radiation research.
• The ability to tune polarization enhances capabilities for materials science, chemistry, and physics studies.
• The compact design and advanced undulator technology offer a cost-effective solution for generating specialized light sources.