Vacuum power feedthrough with ConFlat (CF) flanges are manufactured with the purpose of passing electrical power, signals, or fluids and containing ultra-high vacuum (UHV) integrity). Their applications are very scientific and industrial, given that they have robust sealing capabilities and can endure extreme environments. Among these, feedthroughs fusion energy research is a critical field where these enable breakthroughs in clean energy technology.
1. The Role Of Vacuum Power Feedthroughs In Fusion Reactors
Reactor power plants like ITER, China Fusion Engineering Test Reactor or CFETR need UHV conditions for high-temperature plasma confinement. Vacuum power feedthrough with CF flanges are used to:
Transmit High-Current Power: Electric TF coils of reactors with superconducting magnets (SF ones) have continuous currents of over 50 kA. Extreme electrical loads must be managed without losing vacuum on the vessel bottom.
Ensure Thermal Stability: CF flanges are elastic metal seals so work at all temperatures. They allow for rapid temperature fluctuations during stable reactor operation quickly.
Support Diagnostics And Control Systems: Sensing elements and drives vacuum chamber position control units actuators.
2. Advantages of CF Flange Design from a Technical Perspective
The unique sealing mechanism of CF flange with a copper gasket gives it unparalleled performance in fusion applications:
Leak-Free Sealing: CF flanges are capable of achieving leak rates smaller than 1 x 10-10 mbar·L/s which is vital for sustaining Ultra-High Vacuum (UHV) in plasma confinement systems.
Voltage and Ampacity: Feedthroughs such as these: Ideal Vacuum A6203-1-CF are rated at 25 kV and 50 A which is adequate for powerful superconducting magnets.
Physical States Compatibility: Conductors made of stainless steel or copper are not corroded by the reactive gases thus ensuring durability in harsh fusion environments.
3. Case Study: Use in CFETR’s Superconducting Coils
The CFETR project utilizes vacuum power feedthroughs in the construction of TF coils. These coils contain Cables-in-Conduit (CICC) which have superconducting cables that require vacuum pressure impregnation (VPI) for insulation. With CF flange:
Aiding Electrical Testing: With VPI, feedthroughs permit real time resistance measurement to check the insulation’s monitoring quality.
Enduring Mechanical Strain: CF flange’s rigid structure can endure thermal growth and electromagnetic forces during coil operation.
4. Challenges and Innovations
While vacuum power feedthroughs are critical, fusion research demands continuous innovation:
High Radiation Resistance: Future reactors like DEMO require feedthrough materials that withstand neutron irradiation without degradation.
Integration with Advanced Diagnostics: Emerging technologies, such as plasma-facing sensors, necessitate compact, multi-channel feedthrough designs.
The Vacuum Power Feedthrough with CF Flange is used in fusion energy research and allows for power transmission in harsh conditions. As commercial-grade projects like ITER and CFETR develop, the requirements for high-quality feedthroughs will increase. For businesses looking at robust Ultra High Vacuum systems, understanding the fine details like voltage limits, material selection, and sealing methods is crucial for maximizing reactor efficiency.