LABCOM group is responsible for the LHD data acquisition and archiving system called the LABCOM System. Here, we provide various kinds of data related support for the LHD staffs and collaborators in data acquisitions and managements, and also in remote participation for the experiment. For more information, click the links for what you'd like to see or do.
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Install a diagnostics system

Follow the steps below to set a new diagnostics data-collecting system.

  1. Configure digitizer and decide where to install

    Decide what modules and how many units of them to use (including the number of channels to use, sampling speed, digitizer category, etc…). Decide where to install.
    *The LHD main room and the LHD basement room of the LHD building are better to be excluded considering future work of the device's upgrading.

  2. Check module availability

    Check the list of available modules. If the modules you wish to use are on the list, apply for the joint purchase of modules. If not, make a request for the use of modules yet to be listed.
    *Please understand that it may take time to prepare a new module.

  3. Apply for installation

    Name the diagnostics system. Name the modules and give them station/device numbers. Apply for the installation/argumentation of a diagnostics system.

  4. Purchase required peripherals

    Buy what is necessary among the options below at our online shop, LABCOM/X Original Products e-Shop.

  5. Prepare for data transmission

    Follow the directions given to the place to install. (Details will be given to you on a case-by-case basis.)

    The Data Acquisition Room in the first basement of the LHD Building (the CAMAC Room)

    1. Channel planning
      Check the layout of coaxial cable ducts and optical termination boxes and decide how to set up a channel for your system.
    2. Apply for CAMAC Room use
      Make request for CAMAC rack power use/wiring/carrying in devices into the CAMAC Room.
      *Please note that the CAMAC/PXI/WE is to be installed within one of the CAMAC racks that contain BNC connecters.
    3. Prepare for data transmission
      Have everything ready for data transmission, such as setting crates/chassis/stations, inserting modules, installing a crate controller/interface and connecting cables.
      *Hand the interface to PCs to LABCOM (This is for PXI only).
      *LABCOM will make preparation for data-collecting system (i.e. PC) and network connection.
    4. Install diagnostics timing demodulator
      Place a timing demodulator and have it connected to the CAMAC/PXI/WE using a cable carrying a coax LEMO connecter for trigger and clock.
      LABCOM will take care of the wiring of the timing demodulator to the master modulator as well as the network connection of the device.
    5. Contact LABCOM
      Call 2452 or send an email to when things are all set.
      *LABCOM will test the system and let you know whether it is working properly.

    Diagnostics Rooms, Heating Power Equipment Room, RF Control Room, Control Devices Room, LHD Main Room, LHD Basement Room

    *The LHD Main Room and the LHD Basement Room are better to be excluded considering the prospective LHD augment work.

    1. Channel planning
      See the layout of coaxial cable ducts and optical termination boxes and decide how to set up a channel for your system.
    2. Prepare for data transmission
      Have the system units ready for data transmission, such as setting crates/chassis/stations, inserting modules, installing a crate controller/interface, connecting cables and so on.
      *Hand the interface to PCs to LABCOM (PXI only).
      *LABCOM will make preparation for data-collecting system (i.e. PC) and network connection.
    3. Secure network channels
      Secure duplex channels between an optical media convertor and the Diagnostics Computer Room of the LHD Control Building, which is necessary for network connection.
      1. Purchase an optical fiber cable as follows:
        FC/SC duplex cable 1pc:
        This is for the connection within a same room between the convertor to an optical termination box.
      2. Check the list of optical termination boxes in use to see whether a duplex channel from the installation location to the CAMAC Room/the Diagnostics Computer Room is available or not. Make request for the use of optical termination box to secure the channel.
        *LABCOM will set up a channel beyond the CAMAC Room.
      3. Connect the converter to the allotted termination box via the optical fiber cable that you have purchased.
        *Please lay an optical fiber cable beneath a raised floor or using a cable-through ladder.
    4. Install timing demodulator
      Bring in a diagnostics timing demodulator and have it connected to CAMAC/PXI/WE using a cable carrying a coax LEMO connector for trigger and clock.
      *LABCOM will handle the network connection of the demodulator. Let us know where you install the device. Call 2452, or send email to .
    5. Secure channel to master modulator
      Secure a single-conductor channel for connecting your demodulator to the master modulator at the CAMAC Room.
      1. Purchase an optical fiber cable as follows:
        FC/FC (single core) cable: 1 pc
        This is to connect between the demodulator and an optical termination box in the same room.
      2. See the list of optical termination boxes in use to check if there is a single-conductor channel available from the room to the CAMAC Room. Make request for the use of an optical termination box for the connection.
        *LABCOM will take care of the wiring within the CAMAC Room from the termination box to the master modulator.
      3. Have the timing demodulator connected to the allotted optical termination box via the optical fiber cable that you have purchased.
        *Please lay optical fiber cables beneath a raised floor or using a cable-through ladder.
    6. Contact LABCOM
      Call 2452 or send email to when things in the room are all set.
      *LABCOM will test the system and let you know whether it is working properly.

  6. Set digitizer and timing

    Go to the Setting for Data Acquisition to set the digitizer's operation parameters. Click here to see how to do the setting. To configure timing (trigger and clock), you need to download and install a software application “Plasma Diagnostics Control Client System”, through which you set timing parameters. Click here to see how to install/use the software.

  7. Test performance

    Before starting your system, you may have calibration data using the LABCOM system. Go to Test with LABCOM System.

  8. See collected raw data

    Download and install Retrieve, a program of diagnostics data acquisition procedure, so that you may have a look at raw data/one-stage processed data. Click here to see how to use Retrieve.
    *Go to Search for the Collected to see the progress of data acquisition.
    *Use Retrieve Plot to see diagnostics data in graphs. Click here to see how to use the Retrieve Plot.

Now, you are all set for the diagnostics.