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Detector Lab

Detector Lab
contact:

Elias Hamann

Detector lab

Detector Lab

Figure 1: 3D sketch of the Detectorlab. 1: X-ray setup. 2: Visible light setup. 3: Control electronics.
4. X-ray control interface. 5: Visible-light control interface.


The application, commissioning and development of 2D and 3D X-ray imaging techniques are some of the main tasks of the Imaging group. Therefore, a detector lab has been established at ANKA which is dedicated to R&D of imaging detectors. In this lab, detectors can be characterized, calibrated and tested “off-line”, independently of the synchrotron storage ring status and/ or user operation. Two experimental stations are available in the lab (Figure 1):

  • An X-ray setup, including a high-energy, high-power microfocus X-ray tube (160 kVp, 320 W) and a 5-axispositioning system mounted on an optical breadboard for moving one or more detectors and test samples independently. The X-ray setup is surrounded by a fully accessible lead cabin and can be controlled remotely. The goal is to implement standardized procedures which allow qualitative and quantitative detector testing.
  • A complementary optical setup to characterize the visible light components of indirect converting X-ray detectors. The setup consists of a broad-band visible-light source, as well as a general purpose manipulator mounted on along optical rail. A photodiode is available to measure the transmission of optical components, as well as to calibrate the flux of the light source. In the future, an upgrade with a remotely controllable visible-light monochromator is foreseen. The detectors currently available include indirect converting scintillator-based systems as well as direct converting semiconductor pixel-detector systems. ANKA is part of several collaborations like SCINTAX, Galapad,UFO, the HGF detector initiative, and the Medipix3 collaboration, which all aim for developing and improving X-ray imaging detector systems. The detector lab at ANKA is one big step forward towards playing a major role in these activities.

Available detector systems

Medipix detectors:
256×256 pixels, 55 µm pixel pitch, active area 14×14 mm²
Different readout chips: Medipix2 MXR, Timepix, Medipix3
Sensor materials: Si, GaAs and CdTe
Hexa modules (matrix of 2×3 chips, active area 42×28 mm²)
Readout systems: FitPix (UTF Prague), X-KIT (IPE collaboration)

 

Other detectors:
Dexela 1207 (CsI scintillator, 75×75 µm² pixel size, 115×65 mm² active area)
Perkin Elmer XRD 1621 flat panel (Gadox scintillator, 200×200 µm² pixel size, 400×400 mm² active area)
UFO camera (IPE collaboration, 2048×1088 pixels) 

UFO camera prototype (IPE)

UFO camera prototype (IPE)
Medipix Single and Hexa assembly

Medipix Single and Hexa assembly
Perkin Elmer flat panel

Perkin Elmer flat panel

Applications

Medical / (small) animal imaging

Medical / (small) animal imaging
3D reconstruction / rendering

3D reconstruction / rendering
Material testing / quality assurance

Material testing / quality assurance
„Spectroscopic“ CT

„Spectroscopic“ CT

Current lab upgrade

Upgrade plans:

  • New mechanics for the X-ray tube
  • Add-on for Grating Interferometry (method transfer synchrotron ↔ lab)
  • Integration of DESY‘s high speed Medipix3 readout „LAMBDA“
  • Spectroscopic CT in combination with Grating Interferometry
  • Upgrade of the visible light setup
Recently delivered GaAs and CdTe Medipix3 Hexa assemblies for LAMBDA readout

Recently delivered GaAs and CdTe Medipix3
Hexa assemblies for LAMBDA readout
Grating Interferometry add-on

Grating Interferometry add-on
 

Collaborations

BIRD: Scintillator and semiconductor based imaging detectors

  • FMF Freiburg

GALAPAD: Development of GaAs sensors and pixel detectors

  • DESY
  • TSU Tomsk
  • FMF Freiburg

HiZPad / HiZPad2: High Z pixel detectors

  • Synchrotrons: ESRF, DESY, ELETTRA, DIAMOND, SLS, SOLEIL
  • CPPM, RAL
  • FMF Freiburg, University of Surrey
  • Dectris

EDAS: CdTe pixel detectors

  • FMF Freiburg