Spatial Distribution of Cold Antihydrogen Formation
نویسندگان
چکیده
منابع مشابه
Spatial distribution of cold antihydrogen formation.
Antihydrogen is formed when antiprotons are mixed with cold positrons in a nested Penning trap. We present experimental evidence, obtained using our antihydrogen annihilation detector, that the spatial distribution of the emerging antihydrogen atoms is independent of the positron temperature and axially enhanced. This indicates that antihydrogen is formed before the antiprotons are in thermal e...
متن کاملDriven production of cold antihydrogen and the first measured distribution of antihydrogen states.
Cold antihydrogen is produced when antiprotons are repeatedly driven into collisions with cold positrons within a nested Penning trap. Efficient antihydrogen production takes place during many cycles of positron cooling of antiprotons. A first measurement of a distribution of antihydrogen states is made using a preionizing electric field between separated production and detection regions. Survi...
متن کاملObservations of cold antihydrogen
ATRAP s eþ cooling of p in a nested Penning trap has led to reports of cold H produced during such cooling by the ATHENA and ATRAP collaborations. To observe H, ATHENA uses coincident annihilation detection and ATRAP uses field ionization followed by p storage. Advantages of ATRAP s field ionization method include the complete absence of any background events, and the first way to measure which...
متن کاملComment on "Driven production of cold antihydrogen and the first measured distribution of antihydrogen states".
The recent production of antihydrogen by the ATHENA [1] and ATRAP [2,3] Collaborations represents important steps in antihydrogen experimentation. However, the desired recombination to atomic ground states was apparently interrupted, since weakly bound atoms escape the trap and are detected. Here, we argue that the ATRAP analysis data [3] determines these atoms to be in the long-lived ''guiding...
متن کاملSimulations of antihydrogen formation
The results of simulations of antihydrogen formation in a Penning trap are reported. The antihydrogen atoms are formed by three-body capture. We find that the arrested nature of the three-body capture in the trap greatly reduces the expected binding energy of the antihydrogen. Typically, the formed antihydrogen has larger velocity along the magnetic field than across the field and a binding ene...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2005
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.94.033403