The NSLS 100 element solid state array detector

Area of Science:

• Materials Science
• Analytical Chemistry
• Instrumentation

Background:

• X-ray absorption studies of dilute samples rely on fluorescence detection.
• Solid-state detectors are crucial for trace element analysis due to their ability to differentiate fluorescence from scattered photons.
• Current 13-element germanium (Ge) array detectors are nearing saturation at high-brightness synchrotron sources.

Purpose of the Study:

• To design and develop a next-generation detector with significantly higher count rates for X-ray absorption spectroscopy.
• To address the limitations of current detectors in handling high photon fluxes from advanced synchrotron sources.

Main Methods:

• Development of a 100-element silicon (Si) array detector in a 10x10 matrix configuration.
• Utilizing ultrahigh purity silicon and a liquid nitrogen dewar assembly.
• Employing charge-sensitive preamplifiers, shaping amplifiers, single-channel analyzers, and scalers for signal processing.
• Implementing a comprehensive electronic system for diagnostics and calibration, controlled by LabView software.

Main Results:

• The 100-element Si array detector is designed to achieve substantially higher total count rates compared to existing detectors.
• The detector incorporates advanced electronics for precise signal processing and channel calibration.
• The instrument is controlled via LabView software, facilitating data collection and beamline integration.

Conclusions:

• The developed 100-element Si array detector represents a significant advancement for X-ray absorption spectroscopy.
• This new instrument will enable more efficient and sensitive trace element measurements at high-brightness synchrotron facilities.
• The detector design overcomes current technological bottlenecks, paving the way for future research.