Development of an undulator with a variable magnetic field profile

Area of Science:

• Physics, Applied Physics
• Accelerator Physics

Background:

• Free-electron lasers (FELs) require precisely controlled magnetic fields for operation.
• Existing undulator designs have limitations in magnetic field tunability.
• Novel undulator concepts are crucial for advancing FEL capabilities.

Purpose of the Study:

• To develop and demonstrate a novel undulator with an arbitrarily varied longitudinal magnetic field profile.
• To reduce the mechanical load on actuators for independent control of magnet modules.
• To enhance the flexibility and performance of free-electron lasers.

Main Methods:

• Construction of an undulator composed of individually controllable magnet modules.
• Implementation of a linear actuator system for independent adjustment of the magnetic gap.
• Integration of two spring systems to mitigate magnetic forces between adjacent and opposing modules.
• Performance evaluation through magnetic field measurements and synchrotron radiation characterization.

Main Results:

• Successful development of an undulator capable of arbitrary longitudinal magnetic field variation.
• Demonstrated reduction of mechanical load on actuators via spring systems.
• Validation of undulator performance through magnetic measurements.
• Characterization of generated synchrotron radiation confirming functionality.

Conclusions:

• The developed undulator is a key component for new free-electron laser concepts.
• The design allows for independent control of magnet modules, enhancing tunability.
• The spring systems effectively reduce actuator requirements, improving practicality.
• The undulator's performance is validated, paving the way for advanced FEL applications.