G0 PC Installation and Beam Studies

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Presentation transcript:

G0 PC Installation and Beam Studies January 2007 Stephanie Bailey Riad Suleiman

Pockels Cell Installation January 2, 2007 What did we accomplish? Commission the PC translational Stage. These are the x & y of the PC that minimize the position differences for each IHWP state: IN: x=0, y=90 mils OUT: x=70, y=90 mils Aligned Pockels Cell (PC) Degree of linear polarization = 3.24% Degree of circular polarization = 99.95% Minimized x and y position differences.

Pockels Cell Installation January 2, 2007 Steering (LP OUT) IHWP IN IHWP OUT Goal Δx -0.0137 ± 0.0186 µm -0.0674 ± 0.0204 µm < 0.1 µm Δy -0.0101 ± 0.0139 µm 0.0625 ± 0.0150 µm Δcharge 8.476 ± 2.311 ppm 4.133 ± 2.461 ppm Birefringence (LP IN) IHWP IN IHWP OUT Goal Δx 5.63 ± 0.0195 µm -13.22 ± 0.0198 µm < 6 µm Δy -11.09 ± 0.0116 µm 12.29 ± 0.0119 µm Δcharge -31230 ± 96 ppm 31940 ± 96 ppm Electrical Pickup PC OFF Δx 0.0034 ± 0.0052 µm Δy -0.0056 ± 0.0029 µm Δcharge 4.46 ± 0.63 ppm Injector Happex Δx < 0.3 µm Δy Δcharge w/ photocathode 3X larger in injector w/ photocathode 20X smaller in injector

Electron Beam Studies January 3, 2007 PITA=0 PITA=-180

Electron Beam Studies January 3, 2007 RHWP=170° RHWP=170°

Electron Beam Studies January 3, 2007 IHWP = IN RHWP = 170° -17 ppm/V IHWP = OUT RHWP = 170° 15 ppm/V