Journal
COMMUNICATIONS PHYSICS
Volume 4, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s42005-020-00494-z
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Funding
- Istituto Nazionale di Fisica Nucleare (INFN-Italy)
- CERN Fellowship program
- Swiss National Science Foundation Ambizione [154833]
- Deutsche Forschungsgemeinschaft
- excellence initiative of Heidelberg University
- Marie Sklodowska-Curie Innovative Training Network Fellowship of the European Commission [721559 AVA]
- European's Research Council under the European Unions [291242, 277762]
- European's Union [748826, 754496, 665779, COFUND-FP-CERN-2014]
- Austrian Ministry for Science, Research, and Economy
- Bergen Research Foundation
- John Templeton Foundation
- Institut de Physique Nucleaire et des Particules
- Ministry of Education and Science of the Russian Federation
- Russian Academy of Sciences
- European Social Fund
- University of Brescia
- Fondazione Cariplo
- Regione Lombardia (Italy)
- Research Council of Norway
- Doctoral student program
- European Research Council (ERC) [291242, 277762] Funding Source: European Research Council (ERC)
- Marie Curie Actions (MSCA) [748826] Funding Source: Marie Curie Actions (MSCA)
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Pulsed production of antihydrogen allows for control of temperature, tuning of Rydberg states, de-excitation by pulsed lasers, and manipulation through electric field gradients, marking a significant milestone for the AEgIS experiment.
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 similar to 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 AEgIS experiment to perform direct measurements of the validity of the Weak Equivalence Principle for antimatter.
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