A particle detector is a scientific instrument used to observe and measure particles, such as electrons, protons, and other subatomic entities. These detectors are essential in fields like physics and astrophysics, helping researchers understand the fundamental components of matter and the forces that govern their interactions. There are various types of particle detectors, including scintillation detectors, semiconductor detectors, and cloud chambers. Each type operates on different principles, such as detecting light or electrical signals produced when particles pass through a medium. These tools play a crucial role in experiments conducted at facilities like the Large Hadron Collider.