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Status and Future Plans for AGS Cold Snake Polarization Profiles

This report by Haixin Huang discusses the current status of the AGS Cold Snake's polarization and outlines future plans to enhance performance. With a focus on achieving a polarization level around 60% through the careful management of transverse emittances and tune adjustments, the paper emphasizes the importance of vertical scraping techniques and the effects of Rubidium temperature on polarization. The document also highlights challenges related to tune stability and equipment limitations as AGS aims to refine its operational parameters for better polarization outcomes.

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Status and Future Plans for AGS Cold Snake Polarization Profiles

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  1. AGS Cold Snake Status and Plan • Haixin Huang Mar 17, 2006 RSC meeting

  2. Pol Count Rate Target Position Polarization Profiles (Fanglei) Target Position 10% CSNK + 5.9% WSNK : red curve and magenta error bar 15% CSNK + 5.9% WSNK : cyan curve and black error bar (Intensity 1.0*10^11 proton/bunch) Haixin Huang

  3. AGS Vertical Polarization Profile Haixin Huang

  4. Intensity Scans Haixin Huang

  5. Status and Plan • 10% AGS cold snake strength gives polarization around 60%. We are going to work on tunes to see if additional improvement can be made on polarization. • Control both transverse emittances is the key to maintain polarization at 60% level. • Use vertical scraping instead of horizontal scraping in the Booster. The actual scraping effect is seen in both planes. Additional polarization gain can be obtained by raise source Rubidium temperature and scrape harder. • Study the vertical polarization profiles. • Set up the machine with horizontal tune close to 8 (at least at low energies). First with y =9.1 and x =8.3. Then lower x to close to 8.05. We will set it up in a different AGS user. The challenges: quad P/S limit; coupling between horizontal and vertical; horizontal tune swing at higher energies. Haixin Huang

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