Abstract
The ASACUSA collaboration developed an ultraslow antiproton beam source, monoenergetic ultraslow antiproton source for high-precision investigation (MUSASHI), consisting of an electromagnetic trap with a liquid He free superconducting solenoid and a low energy antiproton beam transport line. The MUSASHI was capable of trapping and cooling more than $1\ifmmode\times\else\texttimes\fi{}{10}^{7}$ antiprotons and extracting them as an ultraslow antiproton beam with energy of 150--250 eV.
Highlights
An extremely low energy antiproton (p ) beam source is an important tool to synthesize antihydrogen (H ) atoms [1,2,3] and antiprotonic atoms (p Aþ)
On the other hand, such exotic atoms can only be efficiently synthesized from component particles at eV and lower energy scales, and this is far below the mandatory GeV scale of accelerator-produced p
This energy gap has been partially bridged by the CERN Antiproton Decelerator (AD), which decelerates p s with GeV-scale kinetic energy to 5.3 MeV, and re-ejects them every 110 s in 150 ns long pulses, containing 3 Â 107 particles
Summary
An extremely low energy antiproton (p ) beam source is an important tool to synthesize antihydrogen (H ) atoms [1,2,3] and antiprotonic atoms (p Aþ). On the other hand, such exotic atoms can only be efficiently synthesized from component particles at eV and lower energy scales, and this is far below the mandatory GeV scale of accelerator-produced p This energy gap has been partially bridged by the CERN Antiproton Decelerator (AD), which decelerates p s with GeV-scale kinetic energy to 5.3 MeV, and re-ejects them every 110 s in 150 ns long pulses, containing 3 Â 107 particles.
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