• KAGRA
• Subgroups
• VAC
• RaspberryPi

Vacuum DAQ for the old Raspberry Pi system

List of Raspberry Pi

• JGW-L2516462

DAQ Software

System diagram

• [ CC10.py @client_1 ] --(5000/tcp)--> | CC10Listener.py |
                                        |                 | --(Serial)--> [ CC10 device ]
  [ CC10.py @client_2 ] --(5000/tcp)--> |  @raspberrypi   |

System Component

• CC10Listener.py
  • Server application launched on each Raspberry Pi

    • pi@raspberrypi: Documents/bin/CC10Listener.py

    • controls@DGS: /users/DAQ/EpicsDAQ/bin/CC10Listener.py

  • Managed by systemd-user

    • pi@raspberrypi:~ $ systemctl --user status CC10Listener.service 
      ● CC10Listener.service - CC10Listener
         Loaded: loaded (/home/pi/.config/systemd/user/CC10Listener.service; enabled; vendor preset: enabled)
         Active: active (running) since Wed 2026-01-28 13:11:12 JST; 20h ago
        Process: 21836 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
       Main PID: 21839 (python3)
         CGroup: /user.slice/user-1000.slice/user@1000.service/CC10Listener.service
                 └─21839 /usr/bin/python3 /home/pi/Documents/bin/CC10Listener.py --ipaddr 172.16.34.189 --port 5000

  • Service control

    • pi@raspberrypi:~ $ systemctl --user {start,stop,restart,enable,disable} CC10Listener.service

  • Server side logs

    • pi@raspberrypi:~ $ journalctl --user-unit CC10Listener.service
      -- Logs begin at Wed 2026-01-28 07:07:38 JST. --
      Jan 29 10:31:04 raspberrypi python3[21839]: [2026/01/29 10:30:18] Read devices from 172.16.33.11
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB0 2.5e-05 b'\x020S1\r\x020S2505\r'
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB1 1.3e-05 b'\x020S1\r\x020S1305\r'
      Jan 29 10:31:04 raspberrypi python3[21839]: [2026/01/29 10:30:34] Read devices from 172.16.33.39
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB1 1.3e-05 b'\x020S1\r\x020S1305\r'
      Jan 29 10:31:04 raspberrypi python3[21839]: [2026/01/29 10:30:34] Read devices from 172.16.33.39
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB0 2.5e-05 b'\x020S1\r\x020S2505\r'
      Jan 29 10:31:04 raspberrypi python3[21839]: [2026/01/29 10:30:48] Read devices from 172.16.33.11
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB0 2.5e-05 b'\x020S1\r\x020S2505\r'
      Jan 29 10:31:04 raspberrypi python3[21839]:     /dev/ttyUSB1 1.3e-05 b'\x020S1\r\x020S1305\r'

• CC10.py
  • Client application launched on k1script1

    • controls@DGS: /users/DAQ/EpicsDAQ/bin/CC10.py

  • Managed by crontab

    • controls@k1script1:~ $ crontab -l
      * * * * * /users/DAQ/EpicsDAQ/bin/CC10.py --daq --wait 15 > /tmp/crontest-cc10.log 2>&1
      * * * * * /users/DAQ/EpicsDAQ/bin/CC10.py --daq --wait 45 >> /tmp/crontest-cc10.log 2>&1

  • Client side logs

    • controls@k1script1:~$ cat /tmp/crontest-cc10.log 
      [2026/01/29 10:43:19] Write to EPICS
          K1:VAC-PRESSURE_FLAG: 0.0 => 0
          K1:VAC-PRESSURE_X_IXA: 2.2e-05 => 2.2e-05
          K1:VAC-PRESSURE_Y_IYA: 2.6e-05 => 2.6e-05
          K1:VAC-PRESSURE_Y_15: 9.3e-07 => 9.3e-07
          K1:VAC-PRESSURE_X_15: 1e-06 => 1e-06
          K1:VAC-PRESSURE_X_EXGV: 9.9e-06 => 9.9e-06
          K1:VAC-PRESSURE_X_EXA2: 1.9e-05 => 1.9e-05
          K1:VAC-PRESSURE_X_EXA1: 9.5e-06 => 9.5e-06
          K1:VAC-PRESSURE_Y_EYGV: 1.6e-05 => 1.6e-05
          K1:VAC-PRESSURE_CS_BSSR2: 3.3e-05 => 3.3e-05
          K1:VAC-PRESSURE_CS_PR2: 2.6e-05 => 2.6e-05
          K1:VAC-PRESSURE_CS_PR3: 2.6e-05 => 2.6e-05
          K1:VAC-PRESSURE_X_EXT: 2.5e-05 => 2.5e-05
          K1:VAC-PRESSURE_X_EXC: 1.3e-05 => 1.3e-05
          K1:VAC-PRESSURE_Y_EYT: 4.7e-05 => 4.7e-05
          K1:VAC-PRESSURE_CS_OMMTGV: 4.8e-05 => 4.8e-05
          K1:VAC-PRESSURE_CS_SRMGV: 3.4e-05 => 3.3e-05

Channel definition

• DAQ-ed VAC channels are available in /opt/rtcds/kamioka/k1/chans/daq/K1EDCU_VAC_GAUGE.ini.
• EPICS records in DGS network are defined by vac_ioc@k1script1

  • controls@k1script1:~$ sudo supervisorctl status vac_ioc
    vac_ioc                          RUNNING   pid 762, uptime 314 days, 1:32:06
    
    controls@k1script1:~$ cat /etc/supervisor/conf.d/k1vac.conf
    [program:vac_ioc]
    command=bash -c 'cd /opt/rtcds/kamioka/k1/target/k1vac/iocBoot/iock1vac/ && ./st.cmd'
    autorestart=true
    autostart=true
    redirect_stderr=true
    stdout_logfile=/opt/rtcds/kamioka/k1/target/k1vac/vac_ioc.log