PTC: Polymorphic Tracking Code (Etienne Forest)

• Powerful orbit tracking and analysis tools

• Spin subroutines (2009)– Invariant spin field (ISF) via

• Normal form

• Stroboscopic average

– Resonance strengths

• Partial derivatives n/px, n/py , n/• One-resonance Normal Form (Computes directly the

input to the Froissart-Stora formula)

• Includes spin flippersCourtesy of Dr. Sateesh Mane

Example: MIT-Bates South Hall Ring

• Polarized electrons 850 MeV• Internal gas jet target

• Siberian Snake (superconducting solenoid)

• Spin flipper– Resonance strength n/px– Linear response theory

• S R Mane Nucl. Inst. Meth A 601 (2009) 256-263

– Verify using PTC Perfect Match (next slide)

Courtesy of Dr. Sateesh Mane

n/px: MIT-Bates South Hall Ring (courtesy MIT-Bates Lab)

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Linear Response PTC (1st order)

Courtesy of Dr. Sateesh Mane