Compact beam position monitor using a segmented toroidal coil.

Area of Science:

• Particle accelerators
• Beam instrumentation
• Electromagnetic induction

Background:

• Traditional beam position monitors (BPMs) often rely on induced charge.
• A new approach using induced voltages in coils is explored.
• Compact toroidal coils offer a potential alternative for beam monitoring.

Purpose of the Study:

• To investigate an inductive compact beam position monitor (BPM) utilizing segmented toroidal coils.
• To theoretically model and experimentally validate the BPM's response to charged particle beams.
• To assess the achievable resolution and explore sensitivity enhancements.

Main Methods:

• Theoretical investigation using a lumped-element model.
• Experimental measurements in a laboratory setting.
• In-situ validation at the COSY storage ring.

Main Results:

• The BPM's response to bunched particle beams was theoretically modeled and experimentally verified.
• A resonant behavior in the coil's frequency response was identified, suggesting sensitivity enhancement potential.
• A resolution of approximately 5 μm was achieved within a 1-second interval for a 0.5 mA beam current.

Conclusions:

• The inductive toroidal coil BPM is a viable alternative to charge-based monitors.
• The observed resonant behavior can be leveraged to improve BPM sensitivity.
• The developed BPM demonstrates high resolution suitable for precise beam diagnostics.