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PHYSICS WITH ULTRA-LOW ENERGY ANTIPROTONS

Description: In this report the author describes the current status of the antiproton deceleration (AD) facility at CERN, and highlights the physics program with ultra-low energy antiproton at this installation. He also comments on future possibilities provided higher intensity antiproton beams become available at Fermilab, and review possibilities for initial experiments using direct degrading of high energy antiprotons in material has been developed and proven at CERN.
Date: February 1, 2001
Creator: HOLZSCHEITER, M.
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Partner: UNT Libraries Government Documents Department
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The gravitational acceleration of antimatter

Description: We have proposed measuring the acceleration of antiprotons in the Earth`s gravitational field by launching antiprotons from a thermal distribution at 4 K upwards against the force of gravity and measuring their time-of-flight (TOF). The TOF distribution thus obtained will exhibit a cut-off representing the minimum kinetic energy necessary to reach the detector at the top of the experiment. The cut-off time is independent of the inertial mass of the particles and is a direct measure of g for the… more
Date: June 1, 1994
Creator: Holzscheiter, M. H.
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Partner: UNT Libraries Government Documents Department
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Trapping of antiprotons -- a first step on the way to antihydrogen

Description: A first step towards producing and effectively utilizing antihydrogen atoms consists of trapping antiprotons. The immediate next step must then be to control, i.e. trap the produced antihydrogen. The current state of the art in trapping antiprotons and positrons is reviewed, and the challenges in trapping the resulting neutral particles are discussed.
Date: July 1, 1993
Creator: Holzscheiter, M. H.
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Partner: UNT Libraries Government Documents Department
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A measurement of the gravitational acceleration of the antiproton

Description: A fundamental experiment in gravity proposed by us, is the measurement of the gravitational force on antimatter. This measurement would constitute the first direct test of the Weak Equivalence Principle (WEP) for antimatter. The availability of low-energy antiprotons at CERN has made such an experiment feasible, and a proposal to carry out such a measurement has been accepted by the CERN Program Committee. We plan to use a time-of-flight technique similar to that pioneered by Fairbank and Witte… more
Date: January 1, 1990
Creator: Holzscheiter, M. H.
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Partner: UNT Libraries Government Documents Department
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Falling antimatter: An experiment to measure the gravitational acceleration of the antiproton

Description: According to some theories of gravity, antimatter will fall faster than matter in the earth's gravitational field. An experiment to measure the gravitational force on the antiproton is under construction. Antiprotons of a few MeV from the LEAR facility of CERN will be slowed down and caught in a large Penning electromagnetic trap. They will then be cooled and transferred to Penning cooling and launching traps. The gravitational acceleration will be measured by the time-of-flight in a drift tube… more
Date: January 1, 1988
Creator: Dyer, P.; Camp, J.; Holzscheiter, M. H. & Graessle, S.
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Partner: UNT Libraries Government Documents Department
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ANTIHYDROGEN PRODUCTION AND PRECISION SPECTROSCOPY WITH ATHENA/AD-1

Description: CPT invariance is a fundamental property of quantum field theories in flat space-time. Principal consequences include the predictions that particles and their antiparticles have equal masses and lifetimes, and equal and opposite electric charges and magnetic moments. It also follows that the fine structure, hyperfine structure, and Lamb shifts of matter and antimatter bound systems should be identical. It is proposed to generate new stringent tests of CPT using precision spectroscopy on antihyd… more
Date: November 1, 2000
Creator: HOLZSCHEITER, M.; AMSLER, C. & AL, ET
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Partner: UNT Libraries Government Documents Department
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Tests of CPT, Lorentz invariance and the WEP with antihydrogen

Description: Antihydrogen atoms, produced near rest, trapped in a magnetic well, and cooled to the lowest possible temperature (kinetic energy) could provide an extremely powerful tool for the search of violations of CPT and Lorentz invariance. Equally well, such a system could be used for searches of violations of the Weak Equivalence Principle (WEP) at high precision. The author describes his plans to form a significant number of cold, trapped antihydrogen atoms for comparative precision spectroscopy of h… more
Date: March 1999
Creator: Holzscheiter, M. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Formation of low-energy antihydrogen

Description: Antihydrogen atoms, produced near rest, trapped in a magnetic well, and cooled to the lowest possible temperature (kinetic energy) could provide an extremely powerful tool for the search of violations of CPT and Lorentz invariance. The author describes plans to trap antiprotons and positrons in a combined Penning trap and to form a significant number of cold antihydrogen atoms for comparative precision spectroscopy of hydrogen and antihydrogen.
Date: March 1, 1999
Creator: Holzscheiter, M. H. & Collaboration, Athena
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Partner: UNT Libraries Government Documents Department
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Physics with ultra-low energy antiprotons

Description: The experimental observation that all forms of matter experience the same gravitational acceleration is embodied in the weak equivalence principle of gravitational physics. However no experiment has tested this principle for particles of antimatter such as the antiproton or the antihydrogen atom. Clearly the question of whether antimatter is in compliance with weak equivalence is a fundamental experimental issue, which can best be addressed at an ultra-low energy antiproton facility. This paper… more
Date: January 1, 1989
Creator: Holtkamp, D. B.; Holzscheiter, M. H. & Hughes, R. J.
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Partner: UNT Libraries Government Documents Department
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Antihydrogen production and precision experiments

Description: The study of CPT invariance with the highest achievable precision in all particle sectors is of fundamental importance for physics. Equally important is the question of the gravitational acceleration of antimatter. In recent years, impressive progress has been achieved in capturing antiprotons in specially designed Penning traps, in cooling them to energies of a few milli-electron volts, and in storing them for hours in a small volume of space. Positrons have been accumulated in large numbers i… more
Date: December 31, 1996
Creator: Nieto, M. M.; Goldman, T. & Holzscheiter, M. H.
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Partner: UNT Libraries Government Documents Department
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The PS 200 catching trap: A new tool for ultra-low energy antiproton physics

Description: Approximately one million antiprotons have been trapped and electron cooled in the PS200 catching trap from a single fast extracted pulse from LEAR. The system is described in detail, different extraction schemes are discussed, and possible applications of this instrument to ultra-low energy atomic and nuclear physics with antiprotons are mentioned.
Date: April 1, 1994
Creator: Holzscheiter, M. H.; Dyer, P. L.; King, N. S. P.; Lizon, D. C.; Morgan, G. L.; Schauer, M. M. et al.
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Partner: UNT Libraries Government Documents Department
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Beyond metric gravity: Progress on PS-200

Description: The reconciliation of quantum mechanics and gravity on varying distance scales requires changes to General Relativity that may be testable implications. We briefly review the status of tests with matter of the inverse square law and the principle of equivalence, then report on progress on the drift-tube measurement section of PS- 200, the experiment to measure the gravitational acceleration of antiprotons.
Date: January 1, 1993
Creator: Goldman, T.; Brown, R. E.; Camp, J. B.; Darling, T.; Dyer, P.; Holzscheiter, M. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beyond metric gravity: Progress on PS-200

Description: The reconciliation of quantum mechanics and gravity on varying distance scales requires changes to General Relativity that may be testable implications. We briefly review the status of tests with matter of the inverse square law and the principle of equivalence, then report on progress on the drift-tube measurement section of PS- 200, the experiment to measure the gravitational acceleration of antiprotons.
Date: March 1, 1993
Creator: Goldman, T.; Brown, R. E.; Camp, J. B.; Darling, T.; Dyer, P.; Holzscheiter, M. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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