Polarized Proton Setup in the AGS H Huang

Polarized Proton Setup in the AGS H. Huang February 15, 2008 RSC Meeting 2008

AGS Polarization Around 55% ● The tunes are as high as in run 6 for strong intrinsic resonances ● sin 9 v has been raised high at 36+. ● nu_y at 0+ as high as 8. 98 ● Booster harmonics seem OK. ● Injection-on-the-fly lattice. The ramp speed at Ggamma=5 is about 3 times faster. ● Both emittances are larger than run 6. ● Horizontal pol. Profile is stronger

AGS Vertical Tune along Ramp Right now it is 8. 98 at 0+nu

AGS Vertical Tune near Injection Right now it is 8. 98 at 0+nu

Booster H=3 Scan Starting point

AGS Intensity vs. Polarization

Exploring the Injection-on-the-fly ● The AGS study 100 -150 ns did not show a difference in emi. growth difference. ● Harder to reach higher intensity. ● Any problem near injection? ● Need more time to evaluate the injection-on-the-fly.

Horizontal Profile (Fanglei Lin)

Horizontal Profile (Fanglei Lin) 2008 10%CS 2006 14%CS Beam size (rms) (mm) 1. 0301 0. 942 0. 912 Horizontal Emittance (95%) 16. 90(? ) 14. 14 13. 24 Measured / fitted center polarization P 55. 34 (57. 93) 65. 35 (65. 5) 59. 39 (59. 26) P 0 fit 62. 36 +/- 0. 06 67. 97 +/- 0. 87 62. 83 +/- 1. 05 P/ P 0 fit 0. 8874 0. 961 0. 945 Resonance strength factor (K) 0. 00002930 +/0. 000003841 0. 00002028 +/0. 000001129 0. 00002593 +/0. 000001233

Plan ● Booster harmonics full scan at injection. ● Vertical pol. profile measurement ● Setup run 6 lattice in another AGS user. ● Bt. A match study. ● Tune scan at various strong resonances.