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تسجيل مستخدم جديدUpdated Report Acceleration of Polarized Protons to 120-150 GeV/c at Fermilab
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The SPIN@FERMI collaboration has updated its 1991-95 Reports on the acceleration of polarized protons in Fermilabs Main Injector, which was commissioned by Fermilab. This Updated Report summarizes some updated Physics Goals for a 120-150 GeV/c polarized proton beam. It also contains an updated discussion of the Modifications and Hardware needed for a polarized beam in the Main Injector, along with an updated Schedule and Budget.
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Spin resonances can depolarize or spin-flip a polarized beam. We studied 1st and higher order spin resonances with stored 2.1 GeV/c vertically polarized protons. The 1st order vertical ({ u}y) resonance caused almost full spin-flip, while some higher
order { u}y resonances caused partial depolarization. The 1st order horizontal ({ u}x) resonance caused almost full depolarization, while some higher order { u}x resonances again caused partial depolarization. Moreover, a 2nd order { u}x resonance is about as strong as some 3rd order { u}x resonances, while some 3rd order { u}y resonances are much stronger than a 2nd order { u}y resonance. One thought that { u}y spin resonances are far stronger than { u}x, and that lower order resonances are stronger than higher order; the data do not support this.
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The Polarized Electrons for Polarized Positrons experiment at the injector of the Continuous Electron Beam Accelerator Facility has demonstrated for the first time the efficient transfer of polarization from electrons to positrons produced by the pol
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