What are the Challenges Associated with Cold Field Emission Sources?
Despite their advantages, CFES face several challenges: 1. Surface Contamination: The sharp tips are prone to contamination, which can degrade performance and stability. Maintaining ultra-high vacuum conditions is critical. 2. Tip Stability: The emission characteristics are highly sensitive to the geometry of the tip, which can change over time due to ion bombardment or contamination. 3. Manufacturing Complexity: Producing and maintaining the ultra-sharp tips required for efficient field emission is technically challenging and costly.
