Wednesday 19 March 2025
Scientists have been working on developing a new type of detector that can accurately measure the energy deposited by high-energy particles in silicon-based materials. This technology, called Low-Gain Avalanche Detectors (LGADs), has the potential to revolutionize our understanding of particle physics and could even lead to breakthroughs in medical imaging.
The latest research on LGADs focused on studying the behavior of these detectors when exposed to different types of particles. The scientists used a tandem accelerator at the University of Washington to bombard the LGADs with protons of varying energies, while also testing their response to beta particles from a radioactive source.
One of the key findings was that the gain in the LGADs decreased significantly as the angle of incidence increased. This is because the charge carriers in the detector drift towards the gain layer, which can cause the signal to become distorted and reduced. However, when the protons were incident at a shallow angle, the gain suppression effect was much less pronounced.
The researchers also found that the LGADs showed a significant amount of gain suppression compared to the response to minimum ionizing particles (MIPs) measured in laboratory tests. This is because the high-energy particles deposit more charge in the detector, causing the gain to become saturated and reducing its effectiveness.
Another interesting result was the comparison between LGADs from two different manufacturers, HPK and FBK. The FBK detectors had a very shallow gain layer, which led to a higher charge density after multiplication started and a greater suppression effect. This suggests that the design of the gain layer can have a significant impact on the performance of the detector.
The implications of these findings are far-reaching. For example, in particle physics experiments, accurate measurements of energy deposition are crucial for understanding the behavior of high-energy particles. The development of LGADs with improved gain suppression could lead to more precise measurements and new insights into the fundamental laws of nature.
In medical imaging applications, LGADs could be used to create high-resolution images of the body. By accurately measuring the energy deposited by X-rays or gamma rays, doctors could use this technology to diagnose diseases earlier and more effectively.
Overall, the latest research on LGADs has shed new light on the behavior of these detectors under different conditions. While there is still much to be learned, these findings have significant implications for both fundamental physics research and medical imaging applications.
Cite this article: “Unlocking the Secrets of Low-Gain Avalanche Detectors”, The Science Archive, 2025.
Silicon-Based Materials, Low-Gain Avalanche Detectors, Particle Physics, Medical Imaging, High-Energy Particles, Tandem Accelerator, Gain Layer, Charge Carriers, Minimum Ionizing Particles, Detector Performance
