| 시설장비 설명 |
I. Dilution Refrigerator System 1) Insert - Insert outer diameter : 126mm with 109mm IVC - Silver heater-exchanger dilution refrigerator unit with 94mm gold-plated copper bottom mixing chamber - Minimum temperature outside Mixing Chamber : <10mK(±10%) - Cooling power outside M.C. : 450㎼ @ 120mK ±10% - 3(three) Φ17mm clear-shot tubes to IVC (one of them is usded for wiring) - 1K pot and still resistance thermometers( with typical calibration) - MC calibrated thermometer - 40 shielded phosphor bronze wires in twisted pairs (two Fischer 24 pin connectors) anchored at 50mK plate or mixing chamber (8 wires are used for mixing chamber, still and 1K pot thermometers) - 6 wires in a Fischer connector for the still, MC and sorb pump heaters - Double 1K pot circuit and double 3He condensing circuit - Radiation shields at still temperature (gold plated) 2) Oil-free 3He-4He gas handling system - Turbo pump mounted inside the cabinet, backed by dry pump - Two external nitrogen cold traps with dewar - Two helium traps inside insert - Vacuum gauges(1 pirani and 1 penning/pirani) - Flow meter - Sorb-pump - Triple power supply (for still, MC and sorb pump heaters provided with LabView drivers) - Microprocessor controlled electrical valves with manual and automatice operation. Automatic operation using pre-programmed microprocessor with LabView drivers (not included computer with LabView-5, GPIB interface and 3X-RS 232 interfaces) |
