Driven 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. Surviving antihydrogen is stripped in an ionization well that captures and stores the freed antiproton for background-free detection.
Gabrielse
G
G
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA. gabrielse@physics.harvard.edu
Bowden
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Oxley
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P
Speck
A
A
Storry
C H
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Tan
J N
JN
Wessels
M
M
Grzonka
D
D
Oelert
W
W
Schepers
G
G
Sefzick
T
T
Walz
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J
Pittner
H
H
Hänsch
T W
TW
Hessels
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EA