A Multicell Trap for Positron Storage
Penning-Malmberg traps (i.e., consisting of a set of cylindrical electrodes in a uniform magnetic field with electrostatic potentials to provide axial confinement) have proven useful, and sometimes critical for the accumulation, storage and manipulation of positron plasmas 1. Scientific applications of these plasmas include creating cold, trap-based beams for atomic physics studies and tailored sources of positrons for the formation of antihydrogen atoms and positronium molecules (Ps2). Technological applications include forming state-of-the-art positron beams for materials analysis. Generally, the capacity of such traps is expected to be limited by the space charge of the plasma particles which, for a long cylindrical plasma, is proportional to the total particle number per unit length of the plasma. For example a plasma of 1011 particles, 10 cm in length, requires a confinement potential of～7 kV. In order to circumvent this limitation, we proposed a multicell architecture for an antimatter trap, in which multiple traps are arranged in parallel and series (shielded from one another by electrodes) in a common solenoidal magnet and vacuum system 2.
J.R.Danielson T.R.Weber C.M.Surko
University of California,San Diego
国际会议
第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)
武汉
英文
126
2008-05-11（万方平台首次上网日期，不代表论文的发表时间）