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一台新的热真空设备最近在美国科罗拉多州丹佛市的马丁·马丽埃塔公司内建成,此设备由PDM公司和CVL公司(作为总体部)联合进行设计、制造、安装和调试。真空室有5.49×6.10m(宽×长)的平面地板和直径为5.49m的半圆柱室项。真空室的两端各有一扇全开式的大门。其中一扇门装有运行机构。此设备配有4台直径为0.91m的外接式低温泵。真空室的极限真空度为1.3×10~(-5)Pa(9×10~(-8)托)。热沉的最低温度为-179℃,热负载是316MJ/h用液氮冷却;同时热沉温度可用气氮进行调节,维持在-156～121℃范围内的任一恒定温度或以1.1℃/min的速率进行高低温交变。
A new thermal vacuum unit was recently built in Martin Marietta, Denver, Colorado, USA. The unit was jointly designed, manufactured, installed and commissioned by PDM and CVL as the head office. The vacuum chamber has a floor plank of 5.49 x 6.10 m (width x length) and a semicylindrical chamber entry of 5.49 m in diameter. Each end of the vacuum chamber has a full open door. One of the doors is equipped with operating mechanism. This unit is equipped with four external cryogenic pumps with a diameter of 0.91 m. The ultimate vacuum of the vacuum chamber is 1.3 × 10 -5 Pa (9 × 10 -8 Torr). The minimum heat sink temperature is -179 ℃, the heat load is 316MJ / h with liquid nitrogen cooling; while the heat sink temperature can be adjusted with nitrogen to maintain a constant temperature in the range of -156 ~ 121 ℃ or 1.1 ℃ / min rate of high and low temperature alternating.