Status of J-PARC muon science facility at the year of 2005

Because of the large changes required in the design of the Materials and Life Science building, the construction schedule was delayed by at least eight months. Therefore, we started construction of the building in the beginning of the fiscal year of 2004, aiming at a first beam on November in the year 2007. After commissioning of the accelerator and beam transport sections in 2008, muon beams will be available for users in 2009. In this letter, the latest construction status of the J-PARC Muon Science Facility is reported. (c) 2005 Elsevier B.V. All rights reserved.