Optimization of the profile of a pulsed slow positron beam extracted from a buffer-gas positron trap for the production of a variable energy positronium beam
POSTER
Abstract
In this poster we will present some details of steps taken to optimize the beam profile of a pulsed slow positron beam extracted from a buffer-gas positron trap. The beam will be employed for the production of a novel positronium beam by the acceleration and photodetachment of positronium negative ions [1, 2]. The TUS group is planning on using this beam to study positronium diffraction from solid surfaces, providing a unique neutral-particle spectroscopic method with several advantages over conventional neutral-particle spectroscopy, such as a reduced particle mass and, hence, the reduction of damage to the sample surface. [1] K. Michishio, et al. Phys. Rev. Lett.~\textbf{106}, 153401 (2011) [2] K. Michishio, et al. Appl. Phys. Lett.~\textbf{100}, 254102~(2012)
*This work was performed at the Tokyo University of Science. The visit of R. G. to the laboratory was sponsored in part by the NSF EAPSI fellowship and the JSPS Summer Program.