Approach to Ultralow Ion-Beam Temperatures by Beam Cooling

Abstract

“Stochastic cooling” invented based on the requirement from particle physics to create vector bosons by proton–antiproton collision, has attained the reduction of beam emittance in 6 dimensional phase space. “Electron cooling” also enables detailed research of fine structures in electron–molecular ion reactions and realizes one-dimensional ordering of ion beams. Based on these attainments, three-dimensional laser cooling with much stronger cooling force to realize a “Crystalline beam” has been studied. In this chapter, an approach to attain an ultra-low-temperature beam by heat reduction with “Beam cooling” is explained as the ultimate goal.