Polarizing mechanisms for stored<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>p</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mover accent="true"><mml:mi>p</mml:mi><mml:mo stretchy="false">¯</mml:mo></mml:mover></mml:mrow></mml:math>beams interacting with a polarized target

Milstein, A. I.; Strakhovenko, V. M.

doi:10.1103/physreve.72.066503

Cited by 47 publications

(123 citation statements)

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“…The resulting polarizing cross section is in fair agreement with the re-analyzed result of the FILTEX test. A similar study was presented by Strakhovenko (Novosibirsk) based on an earlier paper by the Novosibirsk group [22]. They also obtain reasonable agreement with the re-analyzed FILTEX data of 1992.…”

Section: Workhop At the Cockcroft Institutesupporting

confidence: 66%

Polarized Antiprotons—The Quest For A Missing Tool

Steffens¹

2009

AIP Conference Proceedings

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Abstract. After termination of the LEAR facility in 1996 and the restriction of the CERN antiproton program to Trap experiments, stored antiprotons at low and medium energies are no longer available for experiments. FAIR at GSI (Darmstadt) will provide intense stored antiproton beams in less than a decade from now. This has renewed the interest in polarized antiprotons originally proposed for LEAR. In August 2007, an International Workshop was organized at the Cockcroft Institute (Daresbury) and methods to polarize stored antiprotons were discussed. In June 2008, a Heraeus Seminar at the Physikzentrum in Bad Honnef dealing with the same subject took place. The results of these workshops will be presented with some historical remarks and an account of the recent developments.

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Section: Workhop At the Cockcroft Institutesupporting

confidence: 66%

Polarized Antiprotons—The Quest For A Missing Tool

Steffens¹

2009

AIP Conference Proceedings

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“…describes the rate of change of the number of beam particles N and their total spin J [1,2]. These coupled differential equations involve angular integration of the spin observables presented earlier, as seen in the following table.…”

Section: Polarization Buildupmentioning

confidence: 99%

“…Relativistic expressions for spin observables due to single photon exchange in elastic spin 1/2 -spin 1/2 particle collisions have been presented recently [3]. There has been much recent theoretical debate as to whether electrons in a hydrogen gas target are effective in transferring polarization to the antiproton beam [1,2]. It is claimed that electrons should scatter antiprotons out of the beam to contribute to spin filtering.…”

Section: Introductionmentioning

confidence: 99%

“…The buildup of the polarization of an antiproton beam by spin filtering off a polarized hydrogen target has been described by differential equations [1,2] involving the spin observables for antiproton-electron and antiproton-proton elastic scattering. Relativistic expressions for spin observables due to single photon exchange in elastic spin 1/2 -spin 1/2 particle collisions have been presented recently [3].…”

Section: Introductionmentioning

confidence: 99%

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Spin Observables for Polarizing Antiprotons

O'Brien¹,

Buttimore²

2007

AIP Conference Proceedings

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Abstract. The PAX project at GSI Darmstadt plans to polarize an antiproton beam by repeated interaction with a hydrogen target in a storage ring. Many of the beam particles are required to remain within the ring after interaction with the target, so small scattering angles are important. Hence we concentrate on low momentum transfer (small t), a region where electromagnetic effects dominate the hadronic effects. A colliding beam of polarized electrons with energy sufficient to provide scattering of antiprotons beyond ring acceptance may polarize an antiproton beam by spin filtering. Expressions for spin observables are provided and are used to estimate the rate of buildup of polarization of an antiproton beam.

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“…Spin filtering using the spin-dependent part of the nucleon-nucleon interaction is the only experimentally demonstrated viable method to polarize antiprotons. After the first experimental evidence with a 23 MeV proton beam at the TSR ring in Heidelberg [3], an additional measurement, has been recently performed at the COSY storage ring to provide an independent confirmation of the method and of its present theoretical interpretation [4][5][6]. …”

Section: Introductionmentioning

confidence: 99%

Polarization of a stored beam by spin filtering

Weidemann

2014

EPJ Web of Conferences

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Abstract. In 2011 the PAX Collaboration has performed a successful spin-filtering test using protons at T p = 49.3 MeV at the COSY ring, which confirms that spin filtering is a viable method to polarize a stored beam and that the present interpretation of the mechanism in terms of the proton-proton interaction is correct. The equipment and the procedures to produce stored polarized beams was successfully commissioned and are established. The outcome of the experiment is of utmost importance in view of the possible application of the method to polarize a beam of stored antiprotons.

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Polarizing mechanisms for storedpandp¯beams interacting with a polarized target

Cited by 47 publications

References 7 publications

Polarized Antiprotons—The Quest For A Missing Tool

Polarized Antiprotons—The Quest For A Missing Tool

Spin Observables for Polarizing Antiprotons

Polarization of a stored beam by spin filtering

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