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 | ! 10 pm - 12 am | ||
| System off. | | System off. | ||
| The needles valve were close and the separator pump was off. | | The needles valve were close and the separator pump was off. | ||
|} | |} | ||
| + | |||
| + | |||
| + | '''Note: ''' Due to connection problems the separator flow wasn't reading all the time. The separator was woking from 10:30 am to 10:30 pm, which means that any 0 reading in the separator flow during that time is a false reading. | ||
| + | |||
| + | '''Magnet Temperatures and Helium lost estimations''' | ||
[[Image:04-12-2018 magnetT.jpg|1000px]] | [[Image:04-12-2018 magnetT.jpg|1000px]] | ||
| + | |||
| + | '''Fridge Temperatures during the complete day''' | ||
| + | |||
[[Image:04-12 fridgeT.png|1000px]] | [[Image:04-12 fridgeT.png|1000px]] | ||
| + | |||
| + | '''Fridge Temperatures during the cooling process''' | ||
| + | |||
[[Image:04-12 fridge coolingT.png|900px]] | [[Image:04-12 fridge coolingT.png|900px]] | ||
| + | |||
| + | '''Fridge Temperatures when the nose was at 1.12 K ''' | ||
| + | |||
[[Image:04-12 fridge 1KT.png|1000px]] | [[Image:04-12 fridge 1KT.png|1000px]] | ||
| + | |||
| + | '''Fridge Temperatures when the nose was at 1.9 K''' | ||
| + | |||
[[Image:04-12 fridge TET.jpg|1000px]] | [[Image:04-12 fridge TET.jpg|1000px]] | ||
| + | |||
| + | |||
| + | '''Target Temperatures during the complete day''' | ||
| + | |||
[[Image:04-12 targetT.jpg|1000px]] | [[Image:04-12 targetT.jpg|1000px]] | ||
| + | |||
| + | '''CCS3 and Vapor Pressure measurements''' | ||
| + | |||
[[Image:04-12-2018 targetgoodT.jpg|1000px]] | [[Image:04-12-2018 targetgoodT.jpg|1000px]] | ||
| + | |||
| + | '''CCS3 and Pumps Flows''' | ||
| + | |||
[[Image:04-12-2018 targetflowT.jpg|1000px]] | [[Image:04-12-2018 targetflowT.jpg|1000px]] | ||
| + | |||
| + | |||
| + | '''Shells Pressure and CCSF1 in the Fridge''' | ||
| + | |||
[[Image:04-12 pressure shells.jpg|1000px]] | [[Image:04-12 pressure shells.jpg|1000px]] | ||
Latest revision as of 16:01, 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. |
Note: Due to connection problems the separator flow wasn't reading all the time. The separator was woking from 10:30 am to 10:30 pm, which means that any 0 reading in the separator flow during that time is a false reading.
Magnet Temperatures and Helium lost estimations
Fridge Temperatures during the complete day
Fridge Temperatures during the cooling process
Fridge Temperatures when the nose was at 1.12 K
Fridge Temperatures when the nose was at 1.9 K
Target Temperatures during the complete day
CCS3 and Vapor Pressure measurements
CCS3 and Pumps Flows
Shells Pressure and CCSF1 in the Fridge
04/10/2018 Magnet Precool with LN2
