1KARPES_DAQ

Data acquisition software for the ultra low temperature ARPES system at the electronic structure research laboratory at Korea Advanced Institute of Science and Technology (KAIST).

User guide

Starting the software

1. Make sure that the HV rack switch is turned OFF.

2. Power on the DAQ PC (left) and log in with appropriate credentials.

3. Once the DAQ PC is on, power on the logging PC (right) and check if the network drive (D:) is connected.

4. On the logging PC, start the following programs from the desktop (order does not matter):

   • MG15
   • 🥶 Temperature controller
   • 😇 Motion controller
   • 🎛️ F70H (not required, but recommended to be always running)

   Check if the programs are running correctly by looking at value updates.

5. Once the programs are running, double click on Start Servers in the desktop. In the window that appears, click the three Start Server buttons.

6. On the DAQ PC, start SES.exe from the desktop.

7. In SES, click on Calibration -> Voltages.... Close the voltage calibration window after making sure that the lens mode is angular and the pass energy is sufficiently low.

8. In SES, click on DA30 -> Control Theta... and close the control theta window that appears.

9. Double click on Start DAQ in the desktop. The system is now ready for data acquisition.

Stopping the software

Stopping the software is a reverse process of starting it. Close each program in the reverse order of starting them. Remember to not close the terminal window that appears when starting some programs; they will close automatically when the main window of the program is closed.

Conducting scans

Setting up scans

The DAQ software serves as a front-end for the SES software. All scans must be started with the Start button in the DAQ software, not SES. The user will not have to interact with SES menu items directly.

The slit indicator in the GUI determines the analyzer slit information recorded in the data file. Remember to set the slit indicator to the correct value when changing the analyzer slit.

All attributes are recorded when the scan ends.

Development

Prerequisites

• Python 3.11 or higher
• Additional dependencies for each program are listed in the pyproject.toml file in each subdirectory under src

Installation

1. Install uv

2. Clone the repository and navigate to the root directory.

3. Run:

   uv sync --all-extras --dev

4. Install pre-commit hooks by running pre-commit install in the root directory.

Notes

• Builds must be trigerred manually from the GitHub Actions page.
• When adding or modifying dependencies, use uv to manage them. Do not modify the pyproject.toml files manually.

Build status