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General

HAICU (Hydrogen Antihydrogen Infrastructure at Canadian Universities) is an experimental facility designed for research and development of techniques relating to the trapping of atomic Hydrogen and Antihydrogen. This wiki is the definitive repository of documentation regarding this setup.

HAICU vector.svg

Experimental Setup

Software

Git Repositories

(Most of) the various software packages used for the control and monitoring of the HAICU setup are kept in the TRIUMF gitlab at https://gitlab.triumf.ca/groups/haicu/. In general, each repository should have a README file as well as Doxygen documentation accessible from the "Gitlab Pages" link or from a link at the start of the README. Specifically the software packages are:

  • magnet_control, which contains the drivers, test code, and frontends for Raspberry Pi box controlling the magnet power supplies
  • PPG Client, which contains the code to load and run sequences on the Programmable Pulse Generator (or sequencer)
  • PPG Firmware, which contains the Quartus project of the PPG-Chronobox FPGA code
  • Vacuum Control Software, which contains frontends for the Agilent gauges and turbopumps
  • Teensy Software, which contains both firmware and Midas frontends for the flow and temperature monitoring Teensy boards
  • HV supply, which controls the CAEN DT5533 high voltage supply
  • SiPM bias, which controls the SiPM bias distribution and amplification box (LolX-box)
  • Interlock Watchdog Firmware, which contains the firmware for the Arduino Due "Watchdog"
  • Interlock Watchdog Frontend, which contains the MIDAS frontend to interact with the watchdog
  • Network Status Monitor, which monitors the network reachability of certain devices and throws an interlock if they are not seen
  • Water Pump Monitor, which monitors the operation of the recovery pump. May be different in final setup.

Procedures

Cooling Water Valves

As of now, this procedure applies to the quadrupole test stand in the HAICU area, it will likely be amended for the final setup. Plumbing schematics should also be added.

Water TURN ON procedure

This entire sequence should be performed step-by-step, DO NOT PROCEED if one of the steps fails.

  1. Ensure the interlock input labelled "Flow" is bypassed (yellow LED on)
  2. Check function of both solenoid valves connecting the manifold in the magnet testing area to the cooling lines via the interlock:
    • If open (yellow arrows point along flow direction), manually lift float switch in overflow bucket to trip interlock, observe valves closing, then reset "water mains" interlock output, observe them opening
    • If closed, reset "water mains" interlock output, then follow above procedure
  3. walk up to or call main control room (7333) and let them know you'll turn on HAICU cooling water and they might see a pressure drop
  4. Ensure the pressure release valve on the red line near the AE Techron and the coil test stand is closed
  5. Open manual return valve (red valve above the left solenoid valve)
  6. Confirm that quadrupole is starting to leak water (this is very subtle now and not vital)
  7. Reset water return pump interlock
  8. Open manual supply valve (red valve above right solenoid valve, mounted in a way that cannot be fully opened)
  9. Confirm LEDs on both flow switches on the manifold turn green
    • If they do not, manual valves on the individual branches may not be fully open, check
  10. Arm flow switch interlock by turning off bypass on "Flow" input
  11. Confirm water return pump turns on and off regularly

Water TURN OFF procedure

This entire sequence should be performed step-by-step, DO NOT PROCEED if one of the steps fails.

  1. Close manual supply valve (red valve above right solenoid valve, mounted in a way that cannot be fully opened)
    • This should trip the interlock, with a hiss right next to your head
  2. Close manual return valve (red valve above the left solenoid valve)
  3. Confirm that quadrupole stops leaking water

Main Trap Vacuum (TV551 Navigator pump)

Vent Procedure

  1. Check vent connections
    • Confirm vent valve is installed and cable connected to controller
    • Confirm gas line is connected to dry nitrogen or dry air supply
  2. Pressurize vent line slightly (no more than 0.5 bar or so)
  3. Check controller vent settings
    • Hold left ◀ and right ▶ buttons for 2s to enter menu
    • Use up/down keys to find "Pump Settings", right ▶ to enter
    • Navigate to Vent Valve Mode and confirm it is set to AUTOPUMP SPEED
    • Navigate to Active Stop and confirm it is set to YES
  4. On Gauge controller, navigate to Ion G line and select OFF (use +/-, then OK)
  5. Double check you really want to vent
  6. Press "Start/Stop" on pump controller (if you're still in settings mode, hold "Previous" and "Next" for 2s to exit first)
  7. If display doesn't show useful information, press "Measures" to access operational variables
  8. Observe display and/or Midas history and listen to spin down until display says "STOPPED"
  9. Turn off backing scroll pump
  10. Close off dry gas input to avoid overpressurizing, unless you're opening and want to flow gas

Pumpdown Procedure

  1. Confirm dry gas supply is closed (automatic vent valve is likely open)
  2. Turn on backing scroll pump
  3. Wait for convection gauge reading to drop to 10-2 torr range
  4. Temporarily disable the "Turbopump (TV-551) Controller" and "Turbopump (TV-551) Power" MIDAS alarms (click on the alarm name and set "Active" to NO)
  5. Press "Start/Stop" on Turbo controller (if this is the first time pumping down after major modifications, you may want to first want to navigate to "Pump Settings -> Soft Start" and turn it on, to ramp the pump up more slowly)
  6. Wait for convection gauge to bottom out and turbo to spin up for a few minutes
  7. On Gauge controller, navigate to Ion G line and select Fil1 On or Fil2 On (use +/-, then OK)
  8. Observe pump spinning up to full speed, monitoring pump power draw and temperature readback (press "Measures" if variables are not shown)
    • During spin up power draw can go over 80W, but at full speed should settle below 20W
    • Controller temperature may go up to 60C, but if it goes any higher, it may cut the pump power
    • Most importantly, Bearing temperature should not rise over 35C or so, any more indicates a significant leak leading to higher gas load
  9. Once power draw has dropped well below 30W, reactivate "Turbopump (TV-551) Controller" and "Turbopump (TV-551) Power" MIDAS alarms

Resources and Manuals


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