Difference between revisions of "2018-04-10 Cool Down Analysis"
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|Thermal equilibrium conditions ~1.9 K. | |Thermal equilibrium conditions ~1.9 K. | ||
| The bypass valve was closed and the heat exchanger was opened slightly. The roots were off and a secondary small roughing pump was pumping the cryostat space. | | The bypass valve was closed and the heat exchanger was opened slightly. The roots were off and a secondary small roughing pump was pumping the cryostat space. | ||
| + | | | ||
| + | ! 10 pm - 12 am | ||
| + | | System off. | ||
| + | | The needles valve were close and the separator pump was off. | ||
|} | |} | ||
| − | [[Image:04-12-2018 magnetT.jpg|1000px]] | + | |
| + | [[Image:04-12-2018 magnetT.jpg|frame|thumbnail|1000px|Magnet temperatures and Helium lost estimations.]] | ||
| + | |||
[[Image:04-12 fridgeT.png|1000px]] | [[Image:04-12 fridgeT.png|1000px]] | ||
[[Image:04-12 fridge coolingT.png|900px]] | [[Image:04-12 fridge coolingT.png|900px]] | ||
| Line 29: | Line 35: | ||
[[Image:04-12-2018 targetgoodT.jpg|1000px]] | [[Image:04-12-2018 targetgoodT.jpg|1000px]] | ||
[[Image:04-12-2018 targetflowT.jpg|1000px]] | [[Image:04-12-2018 targetflowT.jpg|1000px]] | ||
| − | [[Image:04-12 | + | [[Image:04-12 pressure shells.jpg|1000px]] |
= 04/10/2018 Magnet Precool with LN2 = | = 04/10/2018 Magnet Precool with LN2 = | ||
Revision as of 15:38, 23 April 2018
04/12/2018 Fridge Cooldown
The fridge was cool-down starting from room temperature on April 12. The steps that day can be summarized as:
| Time | Process | Comment | ||||
|---|---|---|---|---|---|---|
| 10:30 am - 2 pm | Cooling down the separator | Both needle valves closed and Separator pump flow constant at ~ 5 slm | ||||
| 2 pm - 5 pm | Nose cooldown to 1.2 K. | The needle valves were opened (both). The roots were on When the temperature in the nose decrease bellow 4 K, the bypass valve was closed and the heat exchanger was opened slightly. | ||||
| 5 pm - 10 pm | Thermal equilibrium conditions ~1.9 K. | The bypass valve was closed and the heat exchanger was opened slightly. The roots were off and a secondary small roughing pump was pumping the cryostat space. | 10 pm - 12 am | System off. | The needles valve were close and the separator pump was off. |
Magnet temperatures and Helium lost estimations.
04/10/2018 Magnet Precool with LN2
