Recent results from the TESLA Test Facility (TTF)

In this paper we present recent results of the TESLA Test Facility (TTF). The most important milestone was the operation with the TESLA design current, macropulses of 800 /spl mu/s with bunches of 4 nC at a rate of 2.25 MHz. Further studies include measurements of higher order modes (HOMs) in superconducting cavities, optimization of the TTF free electron laser at 108 nm, an experiment on wakefields in rough beam pipes, and new developments for sub-picosecond bunch length measurements. Latest cavity test results show a reliable fulfillment of the TESLA goal of 23.5 MV/m.