Design, Manufacture and Test of the TESLA-TTF Cavity Cryostat

Abstract

The aim of the TESLA Test Facility (TTF) is to build and to operate a superconducting (SC) linear accelerator accelerating electrons to an energy of approximately 450MeV, to establish the technological basis for a SC accelerating structure of competitive cost, that could reliably achieve accelerating field of about 15MV/m. Eight individual nine-cell, 1300Mhz superconducting cavities, their RF equipment, a superferric quadrupole doublet and dipole steering coils and all diagnostic elements are combined in a 12m long accelerator module, housed in a single cryostat. The TTF linac consists of four such modules. Cavities are cooled by superfluid two-phase Helium at 1.8K and the quadrupole windings at 4.5K.

The liquid Helium distribution and cold gas recovery system are incorporated into the cryostat providing additional savings by the reduction of the number of transfer lines and other hardware on the outside of the cryostat enclosure.

on leave of absence from CERN, Geneva