Photon Counting Controls

Note

This page describes photon counting controls for the NI FlexRIO 5771 high speed digitizer module.

Integration Mode

Photon Counting Mode

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This GUI is opened from the Main Window menu. View > Photon Counting Controls

See Photon Counting for more information.

Note

More information about Photon Counting can be found on the Photon Counting concept page.

Photon Counting Controls

Uniform Pixel Bin Size

Disables the geometry correction for the non-uniform resonant scanning speed (see Line Formation)

Photon Counting Controls - Integration Mode

Differentiate Before Integration

Apply centered differentiation on signal for photo current integration

Absolute Value BeforeIntegration

Take the absolute value on signal for photo current integration

Enable Integration Threshold

Ignore any values below threshold for photo current integration

Integration Threshold

Value of integration threshold (in ADC units)

Disable Mask Averaging

Disables the division after sample binning (see Line Formation).

Photon Counting Controls - Photon Counting Mode

Configure Photon Discriminator

Shows the photon discriminator GUI

Show Photon Histogram

Shows the photon histogram

Photon Selection Mask

For time correlated photon counting; Binary mask that selects photons after laser pulse used to display in channel

Disable Mask Averaging

Disables the division after sample binning (see Line Formation). Should be ON for photon counting.

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Photon Discriminator

Grab Data

Grab raw digitizer data. (Sync)

Save Configuration

Save the current photon configurator settings to disk

Load Configuration

Load photon configurator settings from disk

Signal Conditioning

Click into box to open configuration dialog

Scale by Power of 2

Scale signal by 2^x

Offset

Offset signal by x

Differentiate

Apply centered differentiation filter (0: disabled, 1: enabled)

FIR Filter Enable

Enable/Disable the FIR filter

Filter Coefficients

Click in FIR filter plot to open dialog. Maximum of 32 taps, filter values must be integers

Photon Discriminator

Click into box to open configuration dialog

Peak Threshold

Threshold for photon detection

Peak Window

Window size (in samples) for peak detection, must be odd number

Debounce

Debounce samples

Plots

Mouse wheel zooms, drag with mouse to pan

Yellow threshold line

Drag with mouse to set photon peak threshold

Photon

Click on detected photons, drag window and debounce line to adjust values