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Spin depolarization of a polarized antiproton beam by electron cooling
Phys. Rev. D 33, 2022 – Published 1 April, 1986
DOI: https://doi.org/10.1103/PhysRevD.33.2022
Abstract
A polarized beam of antiprotons can be depolarized by the random collisions with electrons that occur in electron-beam cooling. An estimate shows that the depolarization rate is very small so that electron-beam cooling can be used with polarized antiprotons with negligible loss of polarization.
References (3)
- O. Chamberlain (private communication).
- In order for our treatment to be valid >= hbar / m ups. If <= hbar / m ups then quantum mechanics is required since the magnetic field produced by the electron's magnetic moment will be comparable to or larger than the magnetic field produced by the electron's motion. The requirement that >= hbar / m ups leads to the requirement that the electron velocity in the rest frame of the antiproton must be less than 2 α c, where alpha is the fine-structure constant and c is the speed of light. Thus the kinetic energy of the electron in the rest frame of the antiproton must be less than 54.4 eV.
- D. Pines and C. P. Schlichter, Phys. Rev. 100, 1014 (1955).