Operational performance of the NIJI-III superconducting storage ring

Area of Science:

• Particle accelerators
• Vacuum technology
• Synchrotron radiation physics

Background:

• The NIJI-III superconducting storage ring is a critical facility for advanced research.
• Understanding vacuum performance is essential for operational efficiency.
• Photon-stimulated gas desorption is a key factor affecting vacuum quality in storage rings.

Purpose of the Study:

• To evaluate the operational and vacuum performance of the NIJI-III superconducting storage ring.
• To investigate the phenomenon of photon-stimulated gas desorption within the cold-bore chamber.
• To identify the primary sources of gas desorption impacting the storage ring's vacuum.

Main Methods:

• Operational performance assessment of the NIJI-III storage ring.
• Focused study on the vacuum performance of the cold-bore chamber.
• Examination of photon-stimulated gas desorption post-commissioning.

Main Results:

• The study focused on the vacuum performance of the NIJI-III superconducting storage ring's cold-bore chamber.
• Photon-stimulated gas desorption was analyzed after the storage ring's commissioning.
• Gas desorption from diffuse synchrotron radiation reflection was found not to be the dominant source.

Conclusions:

• The vacuum performance of the NIJI-III superconducting storage ring was successfully evaluated.
• Photon-stimulated gas desorption was investigated, with specific attention to diffuse reflection.
• Diffuse reflection of synchrotron radiation is not the primary cause of gas desorption in the NIJI-III storage ring during electron beam accumulation.