| Title |
An Experimental Study on the Thermal Load of a Cryochamber with Radiation Shields |
| Authors |
김영민(Young Min Kim) ; 강병하(Byung Ha Kang) ; 박성제(Seong-Je Park) |
| Keywords |
극저온 용기 ; Infrared ; 적외선 검출기 ; 복사 차폐막 ; 증발률 실험 ; 적층단열재 Cryochamber ; Infrared ; IR detector ; Radiation shield ; Boil-off test ; Multi-layer insulation ; |
| Abstract |
Infrared (IR) detectors are widely used for such applications as thermoelastic stress analysis, medical diagnostics and temperature measurement. Infrared detectors com-monly need to be refrigerated below 80 K, and thus a cooling system should be equipped together with the detector system. The cooling load, which should be removed by the cooling system to maintain the nominal operating temperature of the detector, critically depends on the insulation efficiency of the cryochamber housing the detector. Thermal load of a cryo-chamber is attributed to the conduction heat transfer through a cold finger, the gases con-duction and radiation heat transfer. The thermal loads of an infrared detector cryochamber with a radiation shield are investigated experimentally in present study. Since the effect of radiation heat transfer on thermal loads is significant, radiation shields is installed in the cold finger part to protect heat input through radiation. |