The effect of global survey misalignment on the SSC

Survey errors in the global alignment of the SSC can affect its performance. These errors can result in an uncertainty in the circumference of the collider, and this can produce a mismatch in the transfer of bunches from the HEB to the SSC. An uncertainty in the half-circumference of the Collider will reduce the luminosity. To estimate this effect, an expression is given for the luminosity as a function of crossing angle and half-circumference difference. In addition, estimates are given for closed orbit distortion, vertical dispersion, and tune shift, resulting from circumferential errors. Suggestions are made for correcting the effects resulting from global survey errors