Detector Test System (II)

(Click to enlarge) Page 1 - Page 2   Next figures (8 to 10) correspond to the integration process previous to the cryostat cooling and temperature control tests.   Fig. 8a Fig. 8b Fig. 8c Figs. 8a, 8b, 8c. Different components of the detector tests system: spare fan-out board free of detector and connections on its mounting interface (Fig. 8a), baffle system and mounting interface (Fig. 8b) and thermal links (Fig. 8c).   Fig. 9a Fig. 9b Figs. 9a and 9b. Cooling system: view of the thermal link connection mounted between the first and the second stages of the cold head of the cold cycle cooler (Fig. 9a) and detector fan-out board with thermal links and temperature control resistor attached (Fig. 9b).   Fig. 10a Fig. 10b Figs. 10a and 10b. Cold bench (Fig. 10a) mounted and connected to the cryostat cover and cold cycle cooler (underneath). View with most of the components mounted on it before closing the cryostat (Fig. 10b).   Fig. 11a Fig. 11b Figs. 11a and 11b. Cooling down temperature profile of the cryostat (Fig. 11a); working temperature of 70 K was reached in about 10 hours. First detector temperature control tests (Fig. 11b): the blue line shows the temperature controlled profile of the detector fan-out board; the pink line shows the cooling profile when control is disabled. Lower plot shows the temperature change rate of the upper profile (K/min.), giving an idea of the level of stabilisation (less than 1 K for constant temperature). The precision reached is of one cent of degree. Page 1 - Page 2