Status of the Stanford Linear Collider*

The Stanford Linear Collider (SLC) was built to collide single bunches of electrons and positrons head-on at a single interaction point with single beam energies up to 55 GeV. The small beam sizes and high currents required for high luminosity operation have significantly pushed traditional beam quality limits. The Polarized Electron Source produces about 8 x 1010 electrons in each of two bunches with up to 28% polarization. The Damping Rings provide coupled invariant emittances of 1.8 x 10-5 r-m with 4.5 x 1010 particles per bunch. The 57 GeV Linac has successfully accelerated over 3 x lOlo particles with design invariant emittances of 3 x 10-5 r-m. Both longitudinal and transverse wakefields affect strongly the trajectory and emittance corrections used for operations. The Arc systems routinely transport decoupled and betatron matched beams. In the Final Focus, the beams are-chromatically corrected and demagnified producing spot sizes of 1.7 to 2.2 pm at the focal point. Spot sizes below 1.7 pm have been made during special tests. Instrumentation and feedback systems are well advanced, providing continuous beam monitoring and pulse-by-pulse control. A luminosity of 2.3 x 1029 cm-2sec-1 has been produced. Over 11,000 polarized Zs were recorded in the SLD detector in the 1992 physics run. * Work supported by the Department of Energy, contract DE-AC03-76SF005 15. Invited Talk at the ECFA Workshop on e+eLinear Colliders (LC92) Garmisch-Partenkirchen, Germany, July 25 August 2, 1992.