Compensation of Solenoid Effects at the TESLA Interaction Point

To achieve high luminosity, the target vertical beam size at the TESLA interaction point is 5 nm. The long solenoid encompassing the detector introduces coupling effects that increase the vertical beam size. In the case that the last quadrupole of the final focus lies inside the solenoid field, the increase in vertical beam size is by as much as two orders of magnitude. In this note, we describe the compensation of the coupling effects using two skew quadrupoles at selected points along the final telescope.