XraySetup < Main

Main Web>DetectorRD>XraySetup (2012-03-28, MartinVanBeuzekom) (raw view)

---+ Setup description

The X-ray setup consists of a radiation shielding enclosure hosting a downward pointing X-ray source. Interlock devices allow to operate the setup in a fully safe condition.

---+ Specifications of the Hamamatsu microfocus X-ray source L9421-02
   * Voltage range: 0-90 kV
   * Current range: 0-200 &mu;A (maximum current depends on voltage)
   * Output window material: 150 &mu;m thick Be
   * Focal spot size: 7 &mu;m @ 90 kV (5 &mu;m @ 90 kV/4 W)
   * Maximum X-ray emission angle: ~ 39 degrees
   * Focal length from X-ray output window (FOD): 9.5 mm
   * Tungsten target
---+ Experimental settings

The setup is currently equipped with the following experimental settings.
---++ Transmission

In this case the detector is simply placed in front of the source. Between the detector and the source a sample can be placed, as well as a beam filter (e.g. 20 mm Al).
---++ Fluorescence

The primary beam is sent to a metal sample. The detector is placed in the backward direction in order to detect the fluorescent photons emitted from the sample. The detector is enclosed in a lead shield in order to prevent contamination from background radiation.
---++ Computed Tomography

Between the source and the detector a stepper motor is placed which allows controlled rotation of the sample while the X-rays are shot. The alignment of the stepper motor axis with respect to the detector is ensured by a system of micrometric translational and tilting stages.
---+

Topic revision: r2 - 2012-03-28 - MartinVanBeuzekom

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