Fujiwara M C, Amoretti M, Bonomi G, Bouchta A, Bowe P D, Carraro C, Cesar C L, Charlton M, Doser M, Filippini V, Fontana A, Funakoshi R, Genova P, Hangst J S, Hayano R S, Jørgensen L V, Lagomarsino V, Landua R, Lodi-Rizzini E, Marchesotti M, Macri M, Madsen N, Manuzio G, Montagna P, Riedler P, Rotondi A, Rouleau G, Testera G, Variola A, van der Werf D P, Yamazaki Y
Department of Physics, University of Tokyo, Tokyo 113-0033, Japan.
Phys Rev Lett. 2004 Feb 13;92(6):065005. doi: 10.1103/PhysRevLett.92.065005.
We demonstrate three-dimensional imaging of antiprotons in a Penning trap, by reconstructing annihilation vertices from the trajectories of the charged annihilation products. The unique capability of antiparticle imaging has allowed, for the first time, the observation of the spatial distribution of the particle loss in a Penning trap. The radial loss of antiprotons on the trap wall is localized to small spots, strongly breaking the azimuthal symmetry expected for an ideal trap. Our observations have important implications for detection of antihydrogen annihilations.
我们通过从带电湮灭产物的轨迹重建湮灭顶点，展示了彭宁阱中反质子的三维成像。反粒子成像的独特能力首次使得观察彭宁阱中粒子损失的空间分布成为可能。反质子在阱壁上的径向损失集中在小区域，强烈打破了理想阱所预期的方位对称性。我们的观察结果对反氢湮灭的探测具有重要意义。
