H̄+${\bar {\mathrm {H}}^{+}}$ production from collisions between positronium and keV antiprotons for GBAR
H̄+${\bar {\mathrm {H}}^{+}}$ production from collisions between positronium and keV antiprotons for GBAR
复制标题
H̄+${ar {mathrm {H}}^{+}}$ GBAR 正电子素和 keV 反质子之间碰撞产生的
DOI：
10.1007/s10751-014-1030-y
复制
发表时间：
2014
影响因子：
--
通讯作者：
F. Biraben
中科院分区：
文献类型：
--
作者：
P. Comini;P. Hervieux;F. Biraben
In the framework of the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment, cross sections for antihydrogen ion (H̄+$\bar {\mathrm {H}}^{+}$) production in collisions between antiprotons (p̄$\bar {\mathrm {p}}$) and excited positronium atoms (Ps), with intermediate production of antihydrogen (H̄$\bar {\mathrm {H}}$), have been computed using a perturbative theory, namely Continuum Distorted Wave - Final State (CDW-FS). The results suggest to use antiprotons at 1, 2 or 6 keV with, respectively, Ps(3p,3d), Ps(2p) or no Ps excitation. A simulation using these cross sections is under development to investigate the reaction chamber geometry and the parameters of the different beams (positrons, antiprotons and laser). This simulation, focusing on Ps(3d), predicts at least one H̄+$\bar {\mathrm {H}}^{+}$ ion per pulse of 3·106p̄$\bar {\mathrm {p}}$ at 1 and 6 keV, and highlights both the interest of positronium excitation and the need for short pulses of particles.
In the framework of the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment, cross sections for antihydrogen ion (H̄+$\bar {\mathrm {H}}^{+}$) production in collisions between antiprotons (p̄$\bar {\mathrm {p}}$) and excited positronium atoms (Ps), with intermediate production of antihydrogen (H̄$\bar {\mathrm {H}}$), have been computed using a perturbative theory, namely Continuum Distorted Wave - Final State (CDW-FS). The results suggest to use antiprotons at 1, 2 or 6 keV with, respectively, Ps(3p,3d), Ps(2p) or no Ps excitation. A simulation using these cross sections is under development to investigate the reaction chamber geometry and the parameters of the different beams (positrons, antiprotons and laser). This simulation, focusing on Ps(3d), predicts at least one H̄+$\bar {\mathrm {H}}^{+}$ ion per pulse of 3·106p̄$\bar {\mathrm {p}}$ at 1 and 6 keV, and highlights both the interest of positronium excitation and the need for short pulses of particles.