Difference between revisions of "2018-04-10 Cool Down Analysis"

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= 04/12/2018 Fridge Cooldown =
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The fridge was cool-down starting from room temperature on April 12. The steps that day can be summarized as:
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{| class="wikitable"
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|+ The table's caption
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! Time
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! Process
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!Comment
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|-
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! 10:30 am - 2 pm
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| Cooling down the separator || Both needle valves closed and Separator pump flow constant at ~ 5 slm
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|-
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! 2 pm - 5 pm
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| Nose cooldown to 1.2 K.
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| 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.
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|-
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! 5 pm - 10 pm
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|Thermal equilibrium conditions ~1.9 K.
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| 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.
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|-
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! 10 pm - 12 am
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| System off.
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| The needles valve were close and the separator pump was off.
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|}
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'''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.
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'''Magnet Temperatures and Helium lost estimations'''
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[[Image:04-12-2018 magnetT.jpg|1000px]]
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'''Fridge Temperatures during the complete day'''
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[[Image:04-12 fridgeT.png|1000px]]
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'''Fridge Temperatures during the cooling process'''
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[[Image:04-12 fridge coolingT.png|900px]]
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'''Fridge Temperatures when the nose was at 1.12 K '''
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[[Image:04-12 fridge 1KT.png|1000px]]
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'''Fridge Temperatures when the nose was at 1.9 K'''
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[[Image:04-12 fridge TET.jpg|1000px]]
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'''Target Temperatures during the complete day'''
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[[Image:04-12 targetT.jpg|1000px]]
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'''CCS3 and Vapor Pressure measurements'''
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[[Image:04-12-2018 targetgoodT.jpg|1000px]]
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'''CCS3 and Pumps Flows'''
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[[Image:04-12-2018 targetflowT.jpg|1000px]]
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'''Shells Pressure and CCSF1 in the Fridge'''
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[[Image:04-12 pressure shells.jpg|1000px]]
  
 
= 04/10/2018 Magnet Precool with LN2 =
 
= 04/10/2018 Magnet Precool with LN2 =
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[[Media:04-10-2018 magnet precool magnetT.pdf]]
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[[Image:04-10-2018 magnet precool magnetT.png|500px]]
 
[[Image:04-10-2018 magnet precool fridgeT.png|600px]]
 
[[Image:04-10-2018 magnet precool fridgeT.png|600px]]
 
[[Image:04-10-2018 magnet precool targetT.png|500px]]
 
[[Image:04-10-2018 magnet precool targetT.png|500px]]
 
[[Image:04-10-2018 magnet precool pressure shells.png|500px]]
 
[[Image:04-10-2018 magnet precool pressure shells.png|500px]]

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:

The table's caption
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

04-12-2018 magnetT.jpg

Fridge Temperatures during the complete day

04-12 fridgeT.png

Fridge Temperatures during the cooling process

04-12 fridge coolingT.png

Fridge Temperatures when the nose was at 1.12 K

04-12 fridge 1KT.png

Fridge Temperatures when the nose was at 1.9 K

04-12 fridge TET.jpg


Target Temperatures during the complete day

04-12 targetT.jpg

CCS3 and Vapor Pressure measurements

04-12-2018 targetgoodT.jpg

CCS3 and Pumps Flows

04-12-2018 targetflowT.jpg


Shells Pressure and CCSF1 in the Fridge

04-12 pressure shells.jpg

04/10/2018 Magnet Precool with LN2

04-10-2018 magnet precool magnetT.png 04-10-2018 magnet precool fridgeT.png 04-10-2018 magnet precool targetT.png 04-10-2018 magnet precool pressure shells.png

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