Gallery

Test Cryostat for NISP

Fig. 11.1. Sectional view of the cryostat with optical path
Fig. 11.2. Cryostat (opened)
Fig. 11.3. Cryostat (closed, in vertical configuration) — Fig. 11.1. Sectional view of the cryostat with optical path Fig. 11.2. Cryostat (opened) Fig. 11.3. Cryostat (closed, in vertical configuration)

Fig. 11.1. Sectional view of the cryostat with optical path

Fig. 11.2. Cryostat (opened)
Fig. 11.3. Cryostat (closed, in vertical configuration)

The cryostat, cooled by liquid nitrogen, is intended for interferometric testing of the optical design of the NISP instrument. In particular, optical components and detectors operating in the infrared range, are to be tested. For the tests, the components must be cooled to temperatures of about 77 K (-196 ° C). Generally, there are two configurations in which the measurements are to be performed. Firstly, a design wherein the optic and the detection unit are located within the cryostat (and the detection unit is also cooled) and on the other hand, a structure in which the detector unit is located outside the cryostat.