Polarization Build-up of a Stored Proton Beam by Interaction with a Purely Electon-polarized Deuterium Gas Target

Le résumé fourni par la source

over the losses occurring in both targets.During a first test of this method, every cycle was divided into 3 phases.In Phase 1 only the polarized target in the A-region was used to measure the initial beam polarization.During phase 2 a thick H2 target was put into the T-region to enhance the depolarization effect.And finally, phase 3 again used the polarized target in A to measure the remaining polarization.A comparison of these scenarios favors the method using a thin polarized hydrogen target in the A-region as a polarimeter and an additional unpolarized gas target in the T-region to reduce the beam lifetime to the desired value.The final data run planned for summer 1996 will use this method with a N2 target in the T-region.To improve the statistics, it is planned to measure in the A-region simulataneously with the insertion of the Nz target in the T-region instead of using the three phase cycles described above.The aim is to measure the depolarization parameter for 3 to 4 different beam lifetimes.

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