Understanding the interplay of the nuclear interaction with polarized protons and the electromagnetic interaction with polarized electrons in polarized atoms is crucial to progress towards the PAX goal to eventually produce stored polarized antiproton beams at FAIR. Presently, there exist two competing theoretical scenarios: one with substantial filtering of (anti)protons by atomic electrons, while the second one suggests a self-cancellation of the electron contribution to filtering. The issue can be clarified by studying the energy dependence of the polarization buildup in a proton beam at COSY at energies in the range from 20 to about 800 MeV. This Letter-of-Intent summarizes the physics case and possible experimental approaches to these studies at COSY.

Spin Filtering Studies at COSY

BARION, Luca;BERTELLI, Susanna;CARASSITI, Vittore;CIULLO, Giuseppe;CONTALBRIGO, Marco;COTTA RAMUSINO, Angelo;FERRETTI, Paola;DRAGO, Alessandro;GUIDOBONI, Greta;LENISA, Paolo;PAPPALARDO, Luciano Libero;STANCARI, Giulio;STANCARI, Michelle Dawn;STATERA, Marco;
2006

Abstract

Understanding the interplay of the nuclear interaction with polarized protons and the electromagnetic interaction with polarized electrons in polarized atoms is crucial to progress towards the PAX goal to eventually produce stored polarized antiproton beams at FAIR. Presently, there exist two competing theoretical scenarios: one with substantial filtering of (anti)protons by atomic electrons, while the second one suggests a self-cancellation of the electron contribution to filtering. The issue can be clarified by studying the energy dependence of the polarization buildup in a proton beam at COSY at energies in the range from 20 to about 800 MeV. This Letter-of-Intent summarizes the physics case and possible experimental approaches to these studies at COSY.
2006
spin filtering; polarized target internal; spin dynamics; storage ring; storage ring lattice; luminosity; resonance depolarization; spin rotator; polarization measurement; COSY
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/532206
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