Synchrotron applications of an amorphous silicon flat-panel detector

Area of Science:

• Materials Science
• Physics
• Engineering

Background:

• The GE Revolution 41RT (GE 41RT) flat-panel detector has been operational at the Advanced Photon Source for over two years.
• This detector features a large 41 cm x 41 cm active area with 200 microm x 200 microm pixels, optimized for approximately 80 keV photons.

Purpose of the Study:

• To detail the physical setup and utility software of the GE 41RT detector system.
• To comprehensively characterize the performance of the GE 41RT detector for scientific applications, particularly in synchrotron diffraction.

Main Methods:

• Detector response linearity was measured at 80.7 keV.
• Lag (memory effect) was quantified across various exposure times and gain settings.
• Modulation transfer function (MTF) was determined using a tungsten slit.
• Background signal was measured under different gain and exposure conditions.
• Radial geometric flatness was assessed using a CeO(2) powder standard.

Main Results:

• The GE 41RT detector exhibits a large active area and high data acquisition rates (8 frames/s radiography, 30 frames/s fluoroscopy).
• Performance metrics such as linearity, lag, MTF, background signal, and flatness were successfully measured.
• The detector demonstrated effectiveness in pair distribution function measurements using amorphous SiO(2) and in strain-stress experiments with Cu/Nb multilayers.

Conclusions:

• The GE 41RT detector's specifications make it highly suitable and versatile for synchrotron diffraction experiments.
• Characterization confirms its reliability and effectiveness for advanced materials analysis and structural studies.