Keck-PAD (Pixel Array Detector)

Direct Detection of Hard X-Rays at MHz Rates

The Sydor Keck-PAD acquires 8 independent images at rates of up to 6.6 MHz in the tender and hard X-ray domains. Beamlines with tender to hard x-ray energies can deploy a Si-based sensor, and harder X-ray beamlines can choose CdTe as their sensor material of choice.

The on-chip capacitors store the data and readout during acquisition, thereby allowing the Sydor Keck-PAD to maintain low noise and high dynamic range of 10e3 at a 6.6 MHz acquisition rate. Each of the 8 frames can be triggered independently allowing ultimate flexibility to extend the measurement duration by varying the frame spacing and exposures. At the end each sequence of 8 frames the data is read out, and the sequence can be repeated continually at rates of 100 Hz. This makes this detector specifically suited for irreversible experiments like Materials in Extreme Conditions (MEC), shock physics, and Equations of State (EOS).

The Sydor Keck-PAD was designed with a modular and tileable design. The standard units are 256 x 128 and 512 x512 arrays of 150 μm pixels, with customizable n×n configurations available to match your experimental requirements.

Keck-PAD Applications

  • Materials in Extreme Conditions with x-ray
    and/or laser probes
  • Shock Physics
  • Time-resolved experiments
  • Destructive experiments

Keck-PAD Features

  • Frame rates up to 10 MHz
  • Maximum QE with silicon (Si) or cadmium
    telluride (CdTe) sensor
  • Configurable frame length and inter-frame
    spacing for up to 8 frames in a burst
  • Full well exceeds 103 photons/pixel/frame
  • Tiled design enables potential for custom
    configuration

Keck-PAD Specifications

  • Sensor Material: 500 µm thick Si or 750 µm CdTe
  • Sensor Format: Eight submodules of 256 x 128 pixels; Standard detector array is a 512 x 512 pixel format
  • Pixel Pitch: 150 µm
  • Full Well Capacity: ~10⁴ photons
  • Read Noise: ~ 0.5 photons/pixel @ 8 keV
  • Dark Current: 2 photons/pixel/s @ 8 keV
  • Frame Rate: up to 10 MHz (for 8 frames)
  • Minimum Integration Time: 50 ns
  • Maximum Continuous Frame Rate: up to 1 kHz
  • Spectral Range: up to 20 keV with Si sensor or greater
    than 20 keV with CdTe sensor
  • Cooling Method: Thermoelectric Cooler (TEC) with
    water waste heat removal
  • Physical Dimensions: 220 x 220 x 300 mm, 10 kg
  • User Interface: EPICS and/or proprietary Sydor
    Control Interface

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