Main operational and interface parameters of the active cooling chain.
|Interface Sorption cooler-4He-JT cooler (4 K gas pre-cooling temperature)||17.2 K|
|Interface 4He-JT cooler-dilution cooler (dilution gas pre-cooling temperature)||4.37 K|
|Interface 1.4 K cooler-dilution gas precooling||1.34 K|
|Temperature of dilution plate (after regulation)||100.4 mK|
|Temperature of bolometer plate (after regulation)||103 mK|
|Temperature of 1.4 K plate (after regulation)||1.395 K|
|Temperature of 4 K plate (after regulation)||4.80 K|
|Dilution plate PID power||24.3–30.7 nW|
|Bolometer plate PID power||5.1–7.4 nW|
|1.4 K PID power||270 μW|
|4 K PID power||1.7 mW|
|4He-JT cooler stroke amplitude||3450 μm|
|Dilution cooler 4He flow rate||16.19–16.65 μmole/s|
|Dilution cooler 3He flow rate||5.92–6.00 μmole/s|
|Present survey life time (started 6 August 2009)||29.4 months|
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