Mark-1 Cryostat Status Report Q1 and Q2, FY03
摘要
The Mark 1 now has a completion date goal of mid-FY05 . The original concept for the Mark-1 cryogenics was based upon a liquid helium (LHe) reservoir, which was developed in collaboration with a group of cryogenic experts from Commissariat a L'Energie Atomique (CEA) in France. This concept meets all requirements and a conceptual design review was held in November 2002. However, meeting the completion date goal would be very difficult with this approach. Subsequent interaction with colleagues at the University of Rochester Laboratory for Laser Energetics (URLLE) generated a modified concept with the LHe cryogenics replaced with a commercial mechanical cryo-cooler. This offers ease of operation, reduced cost, and a shorter schedule. However, some functional requirements cannot be met, and change requests are being written for review and acceptance. A high-level schedule for the cryo-cooler-based Mark-1 has been created, with a more detailed plan for the risk reduction and concept/component testing phase, which extends into the first half of FY04. A complete detailed schedule is in preparation.