The Preservation Of Emittance And Polarization In The International Linear Collider

High luminosity in the International Linear Collider (ILC) requires a very small vertical normalized emittance of 40 nm. The emittance on Damping Ring extraction is 20 nm giving an emittance budget of 20 nm for all components between the Damping Ring (DR) and the Interaction Point (IP). This tight budget requires sophisticated emittance preservation schemes to mitigate growth due to dispersive and chromatic effects, wakefields, coupling and stray fields. The principle sources of emittance growth are first introduced and then the Beam-Based Alignment techniques used in the ILC to mitigate emittance growth are investigated.