  In order to obtain the necessary luminosity with a reasonable amount of beam
power, the Compact Linear Collider (CLIC) design includes an unprecedented
collision beam size of {\sigma} = 1 nm vertically and {\sigma} = 45 nm
horizontally. Given the small and very flat beams, the luminosity can be
significantly degraded from the impact of the experimental solenoid field in
combination with a large crossing angle. Main effects include y-x'-coupling and
increase of vertical dispersion. Additionally, Incoherent Synchrotron Radiation
(ISR) from the orbit deflection created by the solenoid field, increases the
beam emittance. A detailed study of the impact from a realistic solenoid field
and the associated correction techniques for the CLIC Final Focus is presented.
In particular, the impact of techniques to compensate the beam optics
distortions due to the detector solenoid main field and its overlap with the
final focus magnets are shown. The unrecoverable luminosity loss due to ISR has
been evaluated, and found to be in the range 4-5 % for the solenoid design
under study.
