... Near Infrared Camera and Multi-Object Spectrometer Instrument Handbook for Cycle 17 > Appendix E: The NICMOS Cooling System > E.1 The NICMOS Cooling System . E.1 The NICMOS Cooling System . ... Second, the system is capable of providing large cooling power. ... The Neon gas, driven by a high speed circulator pump and cooled via the heat exchanger to the cryocooler loop, circulates through the cooling coil at the aft end of the NICMOS dewar (see Figure E.2 ), thus cooling the entire instrument. ...