How would you approach the problem of plasma density control in an experimental setup?

Sample interview questions: How would you approach the problem of plasma density control in an experimental setup?

Sample answer:

1. Understand the Plasma Parameters: Begin by characterizing the plasma in your experimental setup. Measure the electron density, ion density, electron temperature, ion temperature, and any other relevant parameters. This will provide a baseline for understanding the plasma behavior and identifying the factors that influence its density.

2. Controllable Parameters: Identify the parameters in your experimental setup that can be controlled to influence the plasma density. This may include factors such as gas pressure, discharge current, magnetic field strength, and electrode geometry.

3. Theoretical Models: Utilize theoretical models and simulations to predict how changes in the controllable parameters will affect the plasma density. These models can provide valuable insights into the underlying physics and help you optimize your experimental setup.

4. Diagnostics and Feedback Loops: Implement diagnostic techniques to measure the plasma density and other relevant parameters in real-time. The feedback from these diagnostics can be used to adjust the controllable parameters and maintain the desired plasma density.

5. Open-Loop Control: Initially, use open-loop control techniques to establish a relationship between the controllable parameters and the plasma density. This involves manually adjusting the parameters based on the measured plasma density.

6. Closed-Loop Control: On… Read full answer

   Source: https://hireabo.com/job/5_0_9/Plasma%20Physicist