Category: Publication Content Type
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A Novel Antiproton Radial Diagnostic Based on Octupole Indused Ballistic Loss
A Novel Antiproton Radial Diagnostic Based on Octupole Indused Ballistic Loss We report results from a novel diagnostic that probes the outer radial profile of trapped antiproton clouds. The diagnostic allows us to determine the profile by monitoring the time history of antiproton losses that occur as an octupole field in the antiproton confinement region
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Critical Loss Radius in a Penning Trap Subject to Multipole Fields
Critical Loss Radius in a Penning Trap Subject to Multipole Fields When particles in a Penning trap are subject to a magnetic multipole field, those beyond a critical radius will be lost. The critical radius depends on the history by which the field is applied, and can be much smaller if the particles are injected
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Antihydrogen For Precision Tests In Physics
Antihydrogen For Precision Tests In Physics The creation of atoms of antihydrogen under controlled conditions has opened up a new era in physics with antimatter. We describe the experimental realisation of low energy antihydrogen, via the mixing of carefully prepared clouds of positrons and antiprotons, and some of the progress that has been made in
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Production of Antihydrogen at Reduced Magnetic Field for Anti-atom Trapping
Production of Antihydrogen at Reduced Magnetic Field for Anti-atom Trapping We have demonstrated production of antihydrogen in a 1 T solenoidal magnetic field. This field strength is significantly smaller than that used in the first generation experiments ATHENA (3 T) and ATRAP (5 T). The motivation for using a smaller magnetic field is to facilitate
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Towards Trapped Antihydrogen
Towards Trapped Antihydrogen Substantial progress has been made in the last few years in the nascent field of antihydrogen physics. The next big step forward is expected to be the trapping of the formed antihydrogen atoms using a magnetic multipole trap. ALPHA is a new international project that started to take data in 2006 at
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The ALPHA Antihydrogen Experiment
The ALPHA Antihydrogen Experiment ALPHA is a new experiment at the CERN Antiproton Decelerator (AD). The short term goal of ALPHA is trapping of cold antihydrogen, with the long term goal of conducting precise spectroscopic comparisons of hydrogen and antihydrogen. Here we present the current status of ALPHA and the physics considerations and results leading
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Keeping Antihydrogen: The ALPHA Trap
Keeping Antihydrogen: The ALPHA Trap Antimatter is difficult to make, let alone store. Jeffrey Hangst describes how ALPHA, an experiment attempting to trap antihydrogen at CERN, overcomes some of the difficulties and he questions the reality of ever making more than the tiniest amounts of antimatter. Jeffrey Scott Hangst CERN Courier CERN Courier
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Modelling Of Antihydrogen Formation And The Commissioning Of The ALPHA Antihydrogen Apparatus
Modelling Of Antihydrogen Formation And The Commissioning Of The ALPHA Antihydrogen Apparatus This thesis describes several models of antihydrogen formation as well as the commissioning of the ALPHA antihydrogen during the 2006 Antiproton Decelerator (AD) physics run. Three models are given to describe the short-time production of antihydrogen, including the Simple Temperature Dependant Model, Inverse
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Antimatter Plasmas in a Multipole Trap for Antihydrogen
Antimatter Plasmas in a Multipole Trap for Antihydrogen We have demonstrated storage of plasmas of the charged constituents of the antihydrogen atom, antiprotons and positrons, in a Penning trap surrounded by a minimum-B magnetic trap designed for holding neutral antiatoms. The neutral trap comprises a superconducting octupole and two superconducting, solenoidal mirror coils. We have
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Towards Antihydrogen Confinement With The ALPHA Antihydrogen Trap
Towards Antihydrogen Confinement With The ALPHA Antihydrogen Trap ALPHA is an international project that has recently begun experimentation at CERN’s Antiproton Decelerator (AD) facility. The primary goal of ALPHA is stable trapping of cold antihydrogen atoms with the ultimate goal of precise spectroscopic comparisons with hydrogen. We discuss the status of the ALPHA project and