Initial results from an in-vacuum undulator in the NSLS X-ray ring

Area of Science:

• Physics
• Materials Science
• Synchrotron Radiation

Background:

• Development of advanced X-ray sources is crucial for scientific discovery.
• In-vacuum undulators offer enhanced performance compared to open magnetic structures.
• Collaboration between international facilities accelerates technological innovation.

Purpose of the Study:

• To report the development and commissioning of a short-period in-vacuum undulator (IVUN).
• To evaluate the performance of IVUN for X-ray Ring applications.
• To assess the impact of magnet gap on undulator performance and beam lifetime.

Main Methods:

• The IVUN device integrates magnet arrays from SPring-8 with vacuum systems from NSLS.
• Commissioning studies involved adjusting the magnet gap (2-10 mm) and measuring radiation output.
• Electron beam lifetime and bremsstrahlung radiation were monitored as a function of magnet gap.

Main Results:

• The IVUN achieved its project design goals during commissioning.
• At a 3.3 mm magnet gap, IVUN generated 4.6 keV fundamental radiation with useful second and third harmonics.
• Key performance metrics, including electron-beam lifetime and bremsstrahlung, were characterized across the adjustable magnet gap range.

Conclusions:

• The successful commissioning of IVUN demonstrates its viability as a high-performance X-ray source.
• The tunable nature and harmonic content of IVUN make it suitable for diverse research applications.
• The collaborative development approach proved effective in delivering advanced synchrotron radiation instrumentation.