Trapped positrons for antihydrogen |
| |
Authors: | G Gabrielse L Haarsma K Abdullah |
| |
Institution: | (1) Department of Physics, Harvard University, 02138 Cambridge, MA, USA |
| |
Abstract: | Positrons from a 12 mCi22Na source are slowed by a W(110) reflection moderator and then captured in a Penning trap, by damping their motion with a tuned circuit. Because of the stability of the Penning trap and the cryogenic ultra-high vacuum environment, we anticipate that positrons can be accumulated and stored indefinitely. A continuous loading rate of 0.14 e+/s is observed for 32 h in this initial demonstration. More than 1.6×104 positrons have thus been trapped and stored at 4 K, with improvements expected. The extremely high vacuum is required for compatibility with an existing antiproton trap, which has already held more than 105 antiprotons at 4 K, for producing antihydrogen at low temperatures. The extremely cold positrons in high vacuum may also prove to be useful for cooling highly stripped ions. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|