DLD High Voltage Power Supply

⚠️ DANGER — HIGH VOLTAGE

The DLD high-voltage power supply operates at lethal voltages of up to several kilovolts.

Users must not modify, disconnect, reconnect, or otherwise alter any of the high-voltage connections.

If there is a problem with the connections or cabling, do not attempt to fix it yourself. Contact the responsible beamline staff.

Switching On and Setting the Voltages

Operating Voltages

The following voltages should be used during normal operation:

Channel

Voltage

MCP_B

2400 V

U_DLD

400 V

Rep

500 V

Procedure

  1. Power on the device
    Switch on the device using the Power switch.

  2. Wait for Standby mode
    The display will show an animated logo while the device scans for the internal high-voltage (HV) modules and loads the settings. Once the initialization is complete, the device will enter Standby mode.

  3. Switch on the high voltage
    Press the Start/Standby button located in the lower-left corner of the display. Alternatively, press the Channel control knob, then you will be in edit mode, dont press twice else you will go to stanby mode and all volatges will be zero again.

  4. Set the channel voltages
    Select each channel using the Channel knob and gradually adjust the voltage to the required value using the Adjust knob:

    • MCP_B → 2400 V

    • U_DLD → 400 V

    • Rep → 500 V

    ⚠️ CAUTION — MCP_B

    Be especially careful when setting MCP_B. Ramp the voltage slowly and gradually up to 2400 V. Do not increase the voltage abruptly.

  5. Start the measurement
    Once all three channels have reached their specified voltages, the detector is ready for measurement. You should observe some dark counts even when no signal is present.

High Voltage Power Supply

DLD High Voltage Power Supply

DLD High-Voltage Power Supply

DLD High Voltage Power Supply values

Operating voltage settings

How to Reset the Interlock

The interlock cannot be reset without power cycling the high-voltage power supply.

To reset the interlock:

  1. Switch off the high-voltage power supply.

  2. Wait for the unit to power down completely.

  3. Switch the high-voltage power supply on again.

  4. Wait until the device has completed initialization and entered Standby mode.

  5. Proceed with the normal start-up procedure described above.

⚠️ IMPORTANT

If the interlock trips again after power cycling, do not repeatedly reset the system. Contact the responsible beamline staff to identify the cause of the interlock.