Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and the design of highly sensitive experiments needs antihydrogen with controllable and well defined conditions. We present here experimental results on the production of antihydrogen in a pulsed mode in which the time when 90% of the atoms are produced is known with an uncertainty of ~250 ns. The pulsed source is generated by the charge-exchange reaction between Rydberg positronium atoms—produced via the injection of a pulsed positron beam into a nanochanneled Si target, and excited by laser pulses—and antiprotons, trapped, cooled and manipulated in electromagnetic traps. The pulsed production enables the control of the antihydrogen temperature, the tunability of the Rydberg states, their de-excitation by pulsed lasers and the manipulation through electric field gradients. The production of pulsed antihydrogen is a major landmark in the AE\(\bar{g}\)IS experiment to perform direct measurements of the validity of the Weak Equivalence Principle for antimatter.

温度为K或Sub-K的抗氢原子是精确探查基本物理定律有效性的有力工具，而高灵敏度实验的设计需要条件可控且条件明确的抗氢。我们在这里介绍了在脉冲模式下产生抗氢的实验结果，其中已知90％原子的产生时间为〜250 ns的不确定性。脉冲源是由里德堡正电子原子之间的电荷交换反应产生的，雷德堡正电子原子是通过将脉冲正电子束注入纳米通道Si靶中产生的，并被激光脉冲激发的，而反质子则在电磁阱中被俘获，冷却和操纵。脉冲生产可以控制反氢温度，里德堡态的可调谐性，通过脉冲激光对它们进行消磁，并通过电场梯度对其进行控制。脉冲式抗氢的生产是AE的主要里程碑\（\ bar {g} \） IS实验用于对反物质的弱等效原理的有效性进行直接测量。