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AGS Polarized Proton Status Report - January 25, 2011

The latest performance report from the AGS on polarized proton acceleration highlights a polarization of 65% with an intensity of 1.4e11. Emittances are approximately 18π in both planes at AGS flattop. This remains significant, especially for horizontal emittance, even post-tuning jump quads. Key measurements include vertical timing and the effects of various settings on emittance blowup, momentum scraping, and orbit deviations. Furthermore, the report covers optics measurement, calibration results, and the high injection tune assessment.

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AGS Polarized Proton Status Report - January 25, 2011

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  1. AGS Polarized Proton StatusJanuary 25, 2011Vincent Schoefer

  2. Current performance • 65% polarization with 1.4e11 intensity • Emittances ~18 both planes at AGS flattop (jump quads off) • This is still large horizontally, even coming out the Booster

  3. Tune jump quads • Calculation of jump times: Leif • Gauss clock calibration scan: Leif • Measurement of vertical intrinsic timing: Vincent • Effect on emittance (blowup and scraping) • Coherence length and emittance blowup: Mei • Closed orbit deviations from tune jump quads: Woody • Horizontal scraping on J10 at AGS flattop: Vincent • Momentum scraping at transition: Leif, Vincent • What are the ‘best yet’ times?

  4. Optics • Optics measurement and correction • High injection tune: Vincent • Survey results: Vincent • ORM: Vincent • Harmonic response: Leif • AGS model calibration: Nick, Francois • BtA model calibration: Nick, Keith • Vertical BPM offsets at 9 • via orbit steerer drive term: Woody • via harmonic amplitude response to tune: Leif

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