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AGS/Booster PP Setup Status

This document outlines the progress of the AGS/Booster polarization setup from January 23 to February 5, 2013. It details key activities, including the resolution of the PASS system issue, successful LLRF commissioning, and multiple setups for polarimeter and AGS synchronization. The memo highlights the optimization of beam intensity and polarization, with gradual improvements observed, including a polarization measurement exceeding 70% with JQ adjustments made for optimal performance. The plan for the following days includes ramp measurements and additional tests on the extraction bump.

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AGS/Booster PP Setup Status

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  1. Haixin/Vincent Feb. 5, 2013 Time Meeting AGS/Booster PP Setup Status

  2. Timeline • Jan. 23: PASS system issue delayed start, but got beam spiraling in the AGS. • Jan. 24: LLRF commissioning. Beam accelerated to flattop. • Jan. 25: AGS cold snake PS test. • Jan. 26: AGS LLRF setup continued. Beam survival from shot to shot. • Jan. 27: Polarimeter setup for flattop energy setup was done. • Jan. 28: AGS LLRF setup continued. • Jan. 29: AGS LLRF setup almost done. Field fluctuation near flattop was fixed. Booster F3 and F6 fixed. • Jan. 30: JQ was tested with beam. AGS access to fix E17 snake compensation quads. • Jan. 31:Tunemeter setup was done. AGS setup with snake on was done. • Feb. 1: Tune jump functions were set. Polarimeter setup for injection was done. Polarization was measured above 50% at flattop. • Feb. 2: JQ on shown polarization gain (65% vs. 59%). Zigzags in 9th harmonics have been tuned out. Seen some vertical emittancegrowth with JQ on. • Feb. 3: Continue to optimize optics, to get higher polarization with higher intensity (seen polarization near 70% with 0.9*10^11). • Feb. 4: Increase intensity and efficiency. • Feb. 5: Readjusted the JQ pulse shape for better matching. Taking polarization profile measurements with JQ on and off. Haixin Huang

  3. JQ on and off Comparison 67.6% with JQ on 60.8% with JQ off Haixin Huang

  4. Plan Over Next A Few Days • Ramp measurement with JQ on. • Timing scan with JQ timing (+-1ms, +-2ms). • Polarization profile measurement with JQ on and off. • Test extraction bump (the DC one, used in last year). • Set up H=2 in the booster while doing Siemens test on coming days. • After switching to Siemens, we will setup the snake on machine right away. Haixin Huang

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