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• HFI design, qualification, and performance
  ...operated at a temperature of ~0.1 K by means of a space qualified dilution cooler coupled to a high precision temperature control system. A 4He-JT system pro .... The focal plane unit is attached to the 20K stage cooled by the sorption cooler. This is detailed in Section [[HFI_detection_chain]].
  5 KB (758 words) - 09:41, 3 February 2015
• LFI design, qualification, and performance
  ...also provides 18 K pre-cooling to the HFI helium J-T cooler. Two sorption cooler units are included in the flight hardware. * Sorption Cooler Subsystem (SCS);
  50 KB (7,826 words) - 22:29, 4 February 2015
• Operational history
  ...st piping of the dilution cooler was activated at 03:30 UT, and the 4He-JT cooler compressors were turned on at low stroke at 05:20 UT. After these essential ...-K stage was higher than originally expected. Optimisation of the sorption cooler operation led to an improvement, though they still remained ∼25% higher t
  11 KB (1,616 words) - 12:31, 26 March 2014
• Radiation environment
  VG3, the coldest of three so-called V-grooves, to which the sorption cooler is heat-sunk. The disturbances on the curve are due to adjustments of the operational parameters of this cooler.
  6 KB (921 words) - 17:19, 3 September 2013
• LoadTest2
  ...luctuations in gas-liquid flow, and fluctuations in cosmic ray flux on the dilution and bolometer plates. These fluctuations do not compromise the science data
  42 KB (7,697 words) - 16:43, 4 October 2012
• The Planck mission
  piping of the dilution cooler was activated at 03:30 UT, and the 4He-JT cooler compressors were turned on at low stroke
  13 KB (2,044 words) - 09:08, 21 August 2013
• The satellite
  *Dilution control unit *Sorption cooler radiator
  14 KB (2,170 words) - 09:29, 21 May 2014
• TOI processing LFI
  The antenna temperature is a function of the dilution factor, according to: ...ent view is to take a reference dilution factor <math> D_0 </math>, as the dilution factor for a standardized angular diameter for the planet and fiducial beam
  34 KB (5,468 words) - 15:34, 4 February 2015
• HFI cryogenics
  ==The dilution cooler== The HFI dilution cooler cools the bolometers down to 0.1 K through
  5 KB (754 words) - 02:48, 29 October 2014
• List of acronyms
  * '''DCE''' : Dilution Cooler Electronics * '''J-T''' : Joule-Thomson (cooler)
  6 KB (650 words) - 23:43, 1 February 2015
• HFI operations timeline
  14/05/2009 17:39:39 HFI: open dilution cooler valves 14/05/2009 18:52:33 HFI: set 4-K cooler internal frequency at 40Hz
  27 KB (2,766 words) - 19:41, 11 December 2014
• References2
  title = {Design and performance of the dilution cooler system for the Planck mission},
  39 KB (5,438 words) - 09:40, 20 May 2014
• HFI performance summary
  ...or 30 months, the maximum autonomy expected for the helium of the dilution cooler. The telescope pointing was achieved with an accuracy better than expected
  2 KB (303 words) - 06:48, 10 December 2014
• The Planck mission WiP
  piping of the dilution cooler was activated at 03:30 UT, and the 4He-JT cooler compressors were turned on at low stroke
  16 KB (2,511 words) - 18:59, 14 October 2014
• The satellite WiP
  *Dilution control unit; *Sorption cooler radiator;
  14 KB (2,136 words) - 09:37, 3 February 2015
• Terminology
  ;4K lines: EMI/EMC influence of the 4K cooler mechanical motion on the bolometer readout electronics. ;DCE : Dilution Cooler Electronics
  10 KB (1,539 words) - 15:11, 21 July 2014
• ADC correction
  ...ted signal taking into account the 40 Hz parasitics associated with the 4K cooler drive electronics. ...ional tests done during the LFI extension of the mission when the dilution cooler did not operate anymore. For this reason, there is no reason to detail more
  1 KB (168 words) - 17:10, 4 February 2015