摘要
综述了天文用ＣＣＤ激光探测器对天文杜瓦的要求，介绍了研制的ＴＷＤ型杜瓦的特点和试验情况。试验结果表明，在无探测腔时，Ⅱ型和Ⅲ型杜瓦容器的技术指标分别达到：有效容积２．５Ｌ和１．２５Ｌ；质量２．０５ｋｇ和３．０２ｋｇ；液氮保存期１１０ｈ和１１６ｈ．真空寿命达２年以上．接探测腔后，Ⅱ型杜瓦液氮保存期为４０ｈ；ＣＣＤ冷盘温度可达到－１００～－１２０℃．
his article sums up the demand of cryogenically cooled dewars for astronomical CCD detector. The general situation of the dewars in China, the characteristics of the TWD type dewar and its test are described. The test results show that Mark Ⅱ and Mark Ⅲ dewars vessel without detector achieve the technical targets as follows:effective volume 2.5L and 1.25L, mass 2.05kg and 3.02kg, preservation time of liquid nitrogen 110h and 116h respectively. Vacuum keeping for more than two years. After connecting with detector, the preservation time of Mark Ⅱ dewars for liquid nitrogen is 40h, the temperature of CCD cold plate achieves-100～-120℃.
出处
《中国空间科学技术》
CSCD
北大核心
1995年第1期47-52,共6页
Chinese Space Science and Technology
