Design and implementation of Allison scanner at the KOMAC LEBT

This study presents the design, specifications, and experimental validation of the Allison scanner installed at the injector of the 100 MeV proton accelerator operated by the Korea Multi-purpose Accelerator Complex (KOMAC). The Allison scanner was developed to enable precise characterization of the proton beam’s phase space at the injector stage. Detailed design parameters and operational principles of the system are described. Experimental measurements were conducted under various operating conditions to assess the performance and reliability of the scanner. Furthermore, the daily measurement data collected by the Allison scanner were analyzed to evaluate the long-term stability of the ion source.