Autoresonant Excitation of Antiproton Plasmas

Journal Article · Fri Jan 14 00:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.025002· OSTI ID:21532247

Andresen, G B; Bowe, P D; Hangst, J S ^[1]; Ashkezari, M D; Hayden, M E ^[2]; Baquero-Ruiz, M; Chapman, S; Fajans, J; Povilus, A; So, C ^[3]; Bertsche, W; Butler, E; Charlton, M; Humphries, A J; Madsen, N; Werf, D P. van der ^[4]; Carpenter, P T; Hurt, J L; Robicheaux, F ^[5]; Cesar, C L ^[6]

---

1. Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark)
2. Department of Physics, Simon Fraser University, Burnaby British Columbia, V5A 1S6 (Canada)
3. Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300 (United States)
4. Department of Physics, Swansea University, Swansea SA2 8PP (United Kingdom)
5. Department of Physics, Auburn University, Auburn, Alabama 36849-5311 (United States)
6. Instituto de Fisica, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-972 (Brazil)

We demonstrate controllable excitation of the center-of-mass longitudinal motion of a thermal antiproton plasma using a swept-frequency autoresonant drive. When the plasma is cold, dense, and highly collective in nature, we observe that the entire system behaves as a single-particle nonlinear oscillator, as predicted by a recent theory. In contrast, only a fraction of the antiprotons in a warm plasma can be similarly excited. Antihydrogen was produced and trapped by using this technique to drive antiprotons into a positron plasma, thereby initiating atomic recombination.

• OSTI ID: 21532247
• Journal Information: Physical Review Letters, Vol. 106, Issue 2; Other Information: DOI: 10.1103/PhysRevLett.106.025002; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANTIPROTONS
CENTER-OF-MASS SYSTEM
EXCITATION
NONLINEAR PROBLEMS
OSCILLATORS
PLASMA
POSITRONS
RECOMBINATION
TRAPPING
ANTIBARYONS
ANTILEPTONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
BARYONS
ELECTRONIC EQUIPMENT
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
FERMIONS
HADRONS
LEPTONS
MATTER
NUCLEI
NUCLEONS
PROTONS