Extremely cold antiprotons for antihydrogen production

G. Gabrielse*, W. Jhe, D. Phillips, W. Quint, C. Tseng, L. Haarsma, K. Abdullah, J. Gröbner, H. Kalinowsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


The possibility to produce, trap and study antihydrogen atoms rests upon the recent availability of extremely cold antiprotons in a Penning trap. Over the last five years, our TRAP Collaboration has slowed, cooled and stored antiprotons at energies 1010 lower than was previously possible. The storage time exceeds 3.4 months despite the extremely low energy, which corresponds to 4.2 K in temperature units. The first example of measurements which become possible with extremely cold antiprotons is a comparison of the antiproton inertial masses which shows they are the same to a fractional accuracy of 4×10-8. (This is 1000 times more accurate than previous comparisons and large additional increases in accuracy are anticipated.) To increase the number of trapped antiprotons available for antihydrogen production, we have demonstrated that we can accumulate or "stack" antiprotons cooled from successive pulsed injections into our trap.

Original languageEnglish (US)
Pages (from-to)81-93
Number of pages13
JournalHyperfine Interactions
Issue number1
StatePublished - Dec 1 1993

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Extremely cold antiprotons for antihydrogen production'. Together they form a unique fingerprint.

Cite this