CNGS layout and systems: a progress report

The CNGS (CERN Neutrino beam to Gran Sasso) project was described in a conceptual technical design report in 1998 (the project was then called NGS, cf. report CERN 98-02 / INFN-AE/98-05). An addendum to that report was published in 1999, describing the improvements on the design and performance, in particular in view of the nt appearance experiments to be performed with the CNGS beam (cf. report CERN-SL/99-034(DI) / INFN/AE-99-05). In the time since the publishing of these two reports, the CNGS project was approved by CERN Council and construction work started in September 2000. A further note (SL-Note-2002-012) - written on the occasion of the first CNGS External Review in February 2002 - provided an update concerning changes to the overall layout of the CNGS facility. The present paper describes further layout changes and the modifications to the design of various systems and equipment. This work has been done in preparation of the second CNGS Review, held in April 2003.