Progress Report on the TESLA TEST FACILITY The TESLA Collaboration reported

An R&D RF cavity production and test program is un-derway to evaluate the practicality of superconducting RF cavity systems for future linear collider applications in the 500 GeV energy region. An international collaboration[l] organized by DESY is assembling a TESLA test facility to assess gradient, systems, and manufacturing cost issues of the superconducting RF collider option. Construction of a state of the art cavity processing facility is underway. It is proposed to build four 12 m long cryounits each with eight S-ccl1 superconducting cavities operating at 1.3 GHz. Two 4.5 Mwatt, 2 msec pulse length klystrons will distribute power to the total 32 cavities. An electron gun and injec-tor section will be included in this test facility, and beam tests with energies of about 500 MeV will be carried out