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arXiv 2005.03805physics.atom-phhep-ex
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ALPHA中磁阱反氢的寿命

Lifetime of Magnetically Trapped Antihydrogen in ALPHA

Andrea Capra

摘要:

反氢原子在阿尔法磁阱中停留的时间是阿尔法装置的一个重要特性。在2010年[1]进行的初始捕获实验中,有38个被检测到的反原子被限制了172 ms,而在2011年[2],有7个被限制了1000 s。长的约束时间是必要的,以执行详细的频率扫描在光谱测量。使用机器学习方法对1000多个被限制在ALPHA-2磁阱中数小时的反原子进行了分析,初步得出了66小时的寿命下限。因此,这一观测结果表明,测得的反氢的约束时间延长了两个数量级以上。[1]安德烈森湾B.等人(ALPHA协作),Nature 468,673-676(2010)[2] Andresen,G. B.等人(ALPHA协作),Nature Phys.7,558-564(2011)

英文摘要:

How long antihydrogen atoms linger in the ALPHA magnetic trap is an important characteristic of the ALPHA apparatus. The initial trapping experiments in 2010 [1] were conducted with 38 detected antiatoms confined for 172 ms and in 2011 [2] with seven for 1000 s. Long confinement times are necessary to perform detailed frequency scans during spectroscopic measurements. An analysis carried out, using machine learning methods, on more than 1000 antiatoms confined for several hours in the ALPHA-2 magnetic trap, yields a preliminary lower limit to the lifetime of 66 hours. Hence this observation suggests that the measured confinement time of antihydrogen is extended by more than two orders of magnitude. [1] Andresen, G. B. et al. (ALPHA collaboration), Nature 468, 673-676 (2010) [2] Andresen, G. B. et al. (ALPHA collaboration), Nature Phys. 7, 558-564 (2011)

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