Special Shift on 2023-Apr-12
Currently, only Liquefier A is running and will be automatically switched to "Idle" mode.
If you see the pressure PT503A goes above 8psi, then call Kenichi/Ishara/Dustin
Special Shift on 2023-Apr-10
Currently, only Liquefier A is running. So basically, we wanted it to keep producing LHe.
If you see the following behaviors on Dewar pressure (PT503) and cold head temperatures (TI502,504,506,508,510), and make sure the LQ-A produces liquid (level should keep going up).
then contact Ishara/Kenichi/Dustin as soon as possible.
Use this dedicated page for this monitoring: https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-shift-20230409.php
- The Liq pressure (PT503) changes by >0.5 psi.
- The Liq inflow (FC501I) shows a scattered plot and most of those are zeros.
- The Liq outflow (FCI) changes on average by > 5 SLM.
- The cold-head temperatures (TI50*) go below 4 K or above 5 K.
Note: TI506A has been showing larger values than 5K, so for that one let's use the upper limit as 7K; but the rest of cold-head temps. have to be in the range of 4K-5K. - https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-shift-20230409.php
Special Shift on 2023-Apr-09
The purpose is to make sure that the Liquefiers A & B are producing liquid, avoiding blocking or avoiding higher Dewar pressure.
The person on this special shift monitors the conditions of both Liq A and Liq B. The conditions are checked every 30 minutes at least. The shifter calls the on-call person if
- The Liq pressure (PT503) changes by >0.5 psi.
- The Liq inflow (FC501I) changes on average by > 5 SLM.
- The Liq outflow (FCI) changes on average by > 5 SLM.
- The cold-head temperatures (TI50*) goes below 4 K or above 5 K.
- https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/target-shift-20230409.php
Shift Schedule
| Date | 09 (Su) | 10 (Mo) | 11 (Tu) | 12 (Wed) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Time | 00-08 | 08-16 | 16-24 | 00-08 | 08-16 | 16-24 | 00-08 | 08-16 | 16-24 | 00-08 | 08-16 | 16-24 |
| Monitoring Person | Farooq | Kenichi | Zulkaida | Farooq | Eric | Liliet & Ernesto | Yoshiki | Eric | Jay | |||
| On-Call Person | Kenichi | Kenichi | Kenichi | Ishara | Ishara | Ishara | Kenichi | Kenichi | Kenichi |
If the on-call person does not respond to phone call, try other ways (Discord, e-mail, WhatsApp) or Kenichi/Ishara/Dustin.
Past Shifts
Tasks are mentioned below:
Monitor the fridge temperatures, IVC, flows (fridge, magnet, separator), magnet LHe level, etc.. the full system in general.
In order to look out for these parameters, use the following links:
- https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/IVC_magnet_pressure.php
- https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/fridge_temp_level.php
- https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset/return_flow.php
- Or more under https://e906-gat1.fnal.gov/data-summary/e1039/target-par-preset.php
Shift Schedule
As of 2022-12-22.
| Time | 06:00-10:00 | 10:00-14:00 | 14:00-18:00 | 18:00-22:00 | 22:00-02:00 | 02:00-06:00 |
|---|---|---|---|---|---|---|
| Monitoring Person | Ishara | Vibodha | Ernesto | Farooq | Kenichi | Zulkaida |
| On-Call Person | Vibodha and Farooq | |||||
If anybody is going to shuffle the shift blocks, kindly inform the discord group in advance.
Discord Passive Alarms
The Cryo Control Panel sends out a Discord message in case any of the following parameters become out of its valid range. The table below was updated manually on 2022-12-23.
| Parameter | VI | LO | HI | Unit |
|---|---|---|---|---|
| IVC Pressure | TPG361 | n/a | 1e-5 | Torr |
| Nose LHe Level | Fridge Valve | 65 | 85 | % |
| Tank B, Coil T, Coil B | ITM10 | n/a | 5 | K |
| M1, M2, M3 | Roots-Pump LCW | 0.3 | n/a | GPM |
| WFS1 | Roots-Pump LCW | 1.3 | n/a | GPM |
Non-Monitoring Tasks
The following tasks have to be done by onsite people.
As of 2022-12-22.
- Refill LHe to the fridge (up to Heat-Ex Top) and start the standby mode — At 06:00.
- Refill LHe to the fridge (up to level = 80%) — At 18:00.
- Refill Magnet space with LHe — At 19:00
- Refill LN2 to the Purifier & the shield — When the LN2 level becomes reasonably low.