Call to MCR (Main Control Room):
If there is no Shift Leader, then each Target Operator (TO) should, at the beginning of their shift, call MCR (3721) and report your name and that you are taking over for that particular shift.For Example: "This is John Doe, with FNAL ID number for SpinQuest at NM4 taking over for the Day, Evening, or Owl shift."
Each Target Operator needs to make an FNAL ECL Elog as specified as follows:
To create a new elog, choose the shift based on your status (either you are going to begin your shift or end your shift) under the Form (in the above picture) and choose Category 'Target.'
Write the Entry Subject as Target Operator Morning Shift (Beginning).
Change your shift timing accordingly in the Entry Subject.
- Morning Shift 08:00-16:00
- Swing Shift 16:00-00:00
- Owl Shift 00:00-08:00
Write the People on Shift as the status of the target system at the beginning of the shift, such as the configuration of the fridge system valves, nose level, GV bypass status, Root Pumps status, Microwave status, and polarization level.
Sample:
At the beginning of the morning shift, the fridge nose was 97%, the run and bypass were fully closed, and the GV bypass was set on PID at 100 torr to lower consumption. We plan to refill the fridge before starting microwave tests.
Similarly, at the end of the Target Operator(TO) shift, each TO needs to make a Target Operator summary:
Ensure the TO writes down every piece of information about filling cryogenics (LHe and LN2), playing around the microwave, taking TE measurements, and polarizing the target material. If you are not sure, please contact to the target expert.
Write the Entry Subject as Target Operator Morning Shift (Ending) Summary:
Sample of elog:
Before 14:00, the fridge was in a steady state. We filled the fridge at 14:00 to prepare it for the microwave test. The microwave test is going on, along with the target lifter tests. During making this entry, the polarization is ~30%. The scope of this test is to do some tests to regenerate the AFP (Adiabatic Fast Passive), which flips the polarity of polarization. After this test, we will put the fridge on standby mode to reduce the consumption in the fridge.
Plans for Next Target Operator:
We planned to keep the cold vapors from Dewar A flowing by opening VJVA and VJVT. We have to tweak the flow on the Magnet Return Bypass, equivalent to the production rate of Liq A and ps (plus-minus) 10slm, which helps Liq A be in liquefy mode. Then, occasionally, we decrease the flow on the Magnet Return Bypass a little bit to keep the flow lower. If the Liq A goes to Idle mode due to lowering the flow on Magnet Return Bypass, then again increase the flow on Magnet Return Bypass to bring the Liq A into Liquid mode. We have to follow this strategy to prepare for the Magnet fill in the evening. This helps reduce the boil-off of liquid helium and cools the transfer lines.
After filling the magnet, we do not need to follow the above strategy. We only need to follow it when Liquefier A or B is idle. Then, we can use that dewar to cool down the transfer lines using the above configuration. The magnet filling team will fill the magnet and return the liquefiers to liquefy mode.
About Fridge filling:
We planned to fill the fridge before the magnet filled before midnight. The plan for the fridge after filling it is to keep the fridge dry but not let the sensors go above 60K. These target parameters are Insert#7, Insert#8, Annealing A, and Annealing B. We plan to keep the fridge in a steady state. While drying off the fridge, if these target parameters go above 60K, open the Run valve at 0.65 turns to keep the target material cold using the cold vapors from the Separator, which will be set at seven slm. Try to keep the Main Return flow between 25-35 slm. Do not let the temperature on the target operator parameters be above 90K. If you cannot lower the temperature on target parameters (Insert#7, Insert#8, Annealing A, and Annealing B), immediately call the Target Expert.