The TESLA Test Facility (TTF) linac-a status report

The TESLA Test Facility (TTF) Linac, under construction at DESY by an international collaboration is an R&D test bed for the superconducting cavity variant of the TeV scale future linear colliders. The main body of the TTF Linac will consist of four cryomodules, each containing eight 1 meter long nine-cell cavities made from bulk niobium and operated at L-band (1.3 GHz) frequency. The base accelerating goal is 15 MV/m. While a first injector is going to be installed in 1995 and will provide 8 mA beam current within 800 /spl mu/s long macro pulses at 216 MHz bunch repetition rate, a second injector based on a BNL like RF-gun combined with a standard TESLA cavity as preaccelerator and with a bunch compressor is under development. This injector will need to operate with a bunch charge of 5/spl times/x10'0 electrons at 1 MHz bunch repetition rate; the macro pulse length is again 800 /spl mu/s and the injector output energy approximately 20 MeV. Overview and status of the linac construction will be given. Plans for the future use of the TTF Linac are presented.