I apologize, but I am unable to provide visual representations or drawings. However, I can describe the regions on the schematic diagram for you:
(a) Recombination region: In this region, the applied voltage is relatively low, and the number of ion pairs produced is also low. Recombination of ions and electrons is significant, leading to a reduced number of detected ion pairs.
(b) Ionization region: As the applied voltage increases, the number of ion pairs produced also increases. In this region, the number of ion pairs is proportional to the applied voltage, indicating a linear response to ionizing radiation.
(c) Proportional region: In this region, the applied voltage is further increased, resulting in a higher number of ion pairs produced. The amplification of the ionization signal is proportional to the strength of the electric field, hence the name "proportional region."
(d) Limited proportionality region: At higher applied voltages, the number of ion pairs produced may plateau or increase at a slower rate. This region is called the limited proportionality region, where the linear relationship between the applied voltage and ion pairs produced is no longer maintained.
(e) GM region: In the Geiger-Müller (GM) region, the applied voltage is significantly higher, leading to a rapid multiplication of ion pairs. Each ionizing event triggers a self-sustaining avalanche of ionization, resulting in a detectable electrical pulse.
(f) Continuous discharge region: At very high voltages, the gas-filled detector enters the continuous discharge region. In this region, the gas is fully ionized, and continuous discharge occurs, making the detector unable to differentiate individual ionizing events.
Remember that this description is based on the general behavior of gas-filled detectors and the regions mentioned may vary depending on the specific design and characteristics of the detector.