Specifications include, but are not limited to: Dilution Refrigerator System. Reference BlueFors Model LD400 Dilution Refrigerator System with Vector 3-axis Magnet or equivalent. QTY 1 EACH; (1) Side-axis (6ft tall) free-space optical viewports through vacuum can (window diameter 40mm), 50k rad. Shield (window diameter 30mm), 4k rad. shield(window diameter 30mm), still rad. shield.(window diameter 30mm).; (2) Cold-plate allowing for free-space mirror to be placed between the still flange and Mixing chamber.; (3) Bottom loading probe system with automatic loading, load-lock configuration, and top viewport for free-space optical excitation.; (4) Vector magnetic with 9-1-1 field configuration and 96mm bore.; (5) 25-pin twisted pair wiring and 25-pin low resistance wiring for attocube positioners.; (6) Compatibility with an existing BlueFors dilution unit for comparable measurements with a vector magnet system using the same laser systems.; (7) 20uW cooling power at 20mk temperature, 400uW cooling at 100mk temperature on the probe.; (1) System must include a one (1) year service and maintenance plan. This service and maintenance plan is to begin only after the system is accepted in writing by the University of Maryland.; (2) If multiple tiers of service and maintenance are available, this should be the lowest tier service contract available. The bid response must include detailed information regarding what is included with the service and maintenance support.; (3) The option to purchase the same level of service and maintenance for years two (2) through three (3). These service contact options must be quoted as separately exercisable one-year terms that will be renewable after the initial one (1) year term expires.; (4) Identify the point of contact for UMD that will be responsible for scheduling and providing on-going service and maintenance.
