Journal Archive
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| Herschel Cryostat Cooldown |
| The Herschel spacecraft is set up in the ESTEC cleanroom where it is going through a cooldown, with the main helium tank in the cryostat vacuum vessel (CVV) slowly being filled with liquid helium. The setup for this carefully monitored process was started end January with a smooth cooldown of the helium tank to a temperature of about 4 K and complete filling with more than 2000 litres of liquid helium. |
| Date: 20 Mar 2008 |
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