Proton Calorimetry/Meetings/2021/03/17

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Minutes for UCL Proton Calorimetry Meetings, 17th March


Simon Jolly, Raffaella Radogna, Saad Shaikh, Fern Pannell

Saad Shaikh

  • Small efficiency improvement to FTDI code, optimising writing of averaged values and standard deviations to file.
    • CSV file format is now a column of: average value, standard deviation.
    • liveFit now also writes (x,y) points to output CSV file.
  • Benchmarked FTDI code on Raspberry Pi, approximate average time per acquisition below:
    • 170us with collecting and converting to hex
    • Hiccups with writing hex to file, 180us roughly. If no hiccups, keeps up with 170us
    • 530us with calculation of decimals for measurement record and rolling average, but not writing hex data to file.
    • 650us with calculation of averages and errors at 50Hz, but not writing hex or average values to file.
    • 750us with everything
  • Largely working on HEP summer school this week and next week.
  • Invited by Spyros to give a seminar for PART sometime in May.
  • Will meet with Clive tomorrow to further discuss daisy-chain problems.

Fern Pannell

  • Running the GUI locally has been successful with the http-server.
    • Dummy data is generated by running the java file that writes to the local CSV to be hosted by the server.
    • The http-server is launched in the directory containing the GUI files, available on the IP and port details given in the terminal.
    • Cache clearing problems with Chrome, so typically the GUI performs better on Safari.
    • Running http-server -c-1 will prevent cache issues in Chrome.
  • Won't set Saad up with the http-server as this requires several Javascript package managers and installations.
  • Apache is built in to MacOS, should now explore hosting the GUI with this instead.
    • Requires changing the directory apache serves from by editing the configuration file - having difficulties with this currently.
    • Will reach out to HEP support this week.
  • LibFTDI set up on a new Pi.
    • Slightly different installation process compared to last time.
    • C++ code compiles so the installation was successful, however a connection with the Nexys Video cannot be established.
    • Will investigate this further, update Pi software, new cabling etc.
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