Main Page

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.

Experimental Setup

• Hydrogen Source
• Magnetic Decelerator
• Halbach Bender
• Electromagnetic Bender
• Lasers
• Magnetic Trap
• Detectors
• Interlock System

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

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. Open manual return valve (red valve above the left solenoid valve)
5. Confirm that quadrupole is starting to leak water (this is very subtle now and not vital)
6. Plug in water return pump
7. Open manual supply valve (red valve above right solenoid valve, mounted in a way that cannot be fully opened)
8. Confirm LEDs on the flow switches on the manifold turn green
9. Arm flow switch interlock by turning off bypass on "Flow" input
10. 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. Unplug water return pump
2. 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 loud hiss right next to your head
3. Close manual return valve (red valve above the left solenoid valve)
4. Confirm that quadrupole stops leaking water

Resources and Manuals

• Equipment Manuals
• Miscellaneous Resources