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Outside gaseous helium tank
If this pressure reading gets below 45 psig, then IMMEDIATELY check with the Target Expert. You can check this pressure remotely using the strip charts.
https://e906-gat1.fnal.gov/data-summary/e1039/target-all-auto.php
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Outside Liquid Nitrogen (LN2) tank
If this level is below 24 In.H2O, then please follow the steps on How to order LN2 refill to the tank, gHe tube-trailer, LN gHe cylinders, and LN2 portable Dewars at FNAL to arrange a refill.
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- Checking the LN2 portable (180L) dewars. Note: If snow falls, we must put the LN2 portable dewar inside the NM4 hall near the loading dock because, due to cold, the 22 psi relief valve on the dewar will freeze and keep venting all the time, which will empty the dewar soon. During beam operations, we cannot put the LN2 portable dewar in the NM4 hall.
- The material (CH2/CD2 & NH3 (10g)) is filled with LN2 in the target preparation/handling area. This activity should be performed weekly. Check with the target expert for the week and arrange the material dewar refill with LN2.
- Checking the ODH sensors reading for the NM4 hall (for cryo platform) and NM4 ground level (for NM3). Please put the reading for four sensors, two for the cryo platform (ODH 1 & ODH 2) and two for NM3 (ODH 1 & ODH 2), in the above spreadsheet.
The normal reading is 20.8. If it is changing \pm 0.3, then inform Kun.
- Recording the pressure gauge value for the LCW supply to the Roots pump. Please see the following pictures, whose value needs to be recorded in the above spreadsheet.
- Note: If the pressure values go below 50 psi or goes above 55 psi, please inform in the discord channel.
You can make various viewpoints of the full system strip charts using this page: https://e906-gat1.fnal.gov/data-summary/e1039
The Target TV page 'https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-tv.php' gives you an overall idea about the full system (but not all the parameters).
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6. Outside gaseous helium tank
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If this pressure reading gets below 45 psig, then IMMEDIATELY check with the Target Expert. You can check this pressure remotely using the strip charts.
https://e906-gat1.fnal.gov/data-summary/e1039/target-all-auto.php
If there is a need to arrange the gHe tube trailer to refill, please follow the steps on How to order LN2 refill to the tank, gHe tube-trailer, LN gHe cylinders, and LN2 portable Dewars at FNAL
7. Outside Liquid Nitrogen (LN2) tank
If this level is below 24 In.H2O, then please follow the steps on How to order LN2 refill to the tank, gHe tube-trailer, LN gHe cylinders, and LN2 portable Dewars at FNAL to arrange a refill.
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