STATUS OF CTF3 STRETCHER-COMPRESSOR AND TRANSFER LINE

The first part of the CTF3 transfer line is already installed. It includes a chicane in which, because of its very flexible lattice and large aperture vacuum chamber, the bunch length can change in a wide range.The chicane can be used as a stretcher to lengthen the pulses coming from the linac in order to reduce the coherent synchrotron radiation (CSR) in the recombination rings. A possible use as a bunch compressor is also foreseen in order to make CSR experiments and to characterize beam instrumentation. This paper describes the final design of the vacuum chambers, including beam diagnostics components, and their laboratory tests. The installation status of the magnetic and vacuum chamber components together with the ancillary systems is reported.