CERN Accelerating science

CERN Document Server Znaleziono 137 rekordów  1 - 10następnykoniec  skocz do rekordu: Szukanie trwało 0.62 sekund. 
1.
Adiabatic expansion cooling of antihydrogen / ALPHA Collaboration
Magnetically trapped antihydrogen atoms can be cooled by expanding the volume of the trap in which they are confined. We report a proof-of-principle experiment in which antiatoms are deliberately released from expanded and static traps. [...]
2024 - 6 p. - Published in : Phys. Rev. Res. 6 (2024) L032065 Fulltext: PDF;
2.
Measurements of Penning-Malmberg trap patch potentials and associated performance degradation / ALPHA Collaboration
Antiprotons created by laser ionization of antihydrogen are observed to rapidly escape the ALPHA trap. Further, positron plasmas heat more quickly after the trap is illuminated by laser light for several hours. [...]
2024 - 8 p. - Published in : Phys. Rev. Res. 6 (2024) L012008 Fulltext: PDF;
3.
Observation of the effect of gravity on the motion of antimatter / ALPHA Collaboration
Einstein’s general theory of relativity from 19151 remains the most successful description of gravitation. From the 1919 solar eclipse2 to the observation of gravitational waves3, the theory has passed many crucial experimental tests. [...]
2023 - 23 p. - Published in : Nature 621 (2023) 716-722 Fulltext: PDF; External links: Space.com article; CERN News article; ScienceNews article; Interactions.org article; Physics article; ScienceAlert article; Phys.org article; SciTechDaily article; Physics World article; New York Times article; symmetry magazine article
4.
The Gbar project, or how does antimatter fall? / Indelicato, Paul (Paris, Lab. Kastler Brossel) ; Chardin, G (CSNSM, Orsay) ; Grandemange, P (CSNSM, Orsay) ; Lunney, D (CSNSM, Orsay) ; Manea, V (CSNSM, Orsay) ; Badertscher, A (Zurich, ETH) ; Crivelli, P (Zurich, ETH) ; Curioni, A (Zurich, ETH) ; Marchionni, A (Zurich, ETH) ; Rossi, B (Zurich, ETH) et al.
The Einstein classical Weak Equivalence Principle states that the trajectory of a particle is independent of its composition and internal structure when it is only submitted to gravitational forces. This fundamental principle has never been directly tested with antimatter. [...]
2014 - 10 p. - Published in : Hyperfine Interact. 228 (2014) 141-150
In : 11th International Conference on Low Energy Antiproton Physics, Uppsala, Sweden, 10 - 15 Jun 2013, pp.141-150
5.
Stability of cooled beams / Bosser, J ; Carli, C ; Chanel, M ; Madsen, N ; Maury, S ; Möhl, D ; Tranquille, G
CERN-PS-99-044-DI.- Geneva : CERN, 1999 - 21 p. Fulltext: PDF;
6.
Beam lifetime in the antiproton decelerator (AD) / Grobner, O ; Madsen, N ; Maury, S ; Moehl, D
CERN-PS-HP-Note-97-34; CERN-AD-Note-14.- Geneva : CERN, 1997 - 11 p. Fulltext: PDF;
7.
Simulations of electron cooling using 'betacool' / Madsen, N
CERN-PS-DI-Note-99-20; CERN-AD-Note-53.- Geneva : CERN, 1999 - 53 p. Fulltext: PDF;
8.
Beam evolution in the antiproton decelerator (AD) under the influence of residual gas and intra beam scattering / Madsen, N
CERN-PS-DI-Note-99-06; CERN-AD-Note-47.- Geneva : CERN, 1999 - 33 p. Fulltext: PDF;
9.
Beam deterioration by multiple scattering on rest gas / Madsen, Niels
CERN-PS-HP-Note-97-30; CERN-AD-Note-97-12.- Geneva : CERN, 1997 - 6 p. Fulltext: PDF;
10.
Design and performance of a novel low energy multispecies beamline for an antihydrogen experiment / ALPHA Collaboration
The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low-energy ($\lesssim$ 100 eV) positron and antiproton transport between cylindrical Penning traps that have strong axial magnetic fields. Here, we describe how a combination of semianalytical and numerical calculations were used to optimise the layout and design of this beamline. [...]
arXiv:2211.09838.- 2023-04-03 - 15 p. - Published in : Phys. Rev. Accel. Beams 26 (2023) 040101 Fulltext: 2211.09838 - PDF; Publication - PDF;

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