Institute Science and Technology of Accelerating Systems
Quadrupole Resonator (QPR)
New material treatment techniques for niobium (e.g., nitrogen infusion) and new SRF materials (such as multilayer superconductors) can have a dramatic impact on SRF operation, especially for CW systems. Sample tests are best suited to analyze these materials in a controlled manner over a wide range of parameters. The quadrupole resonator provides a very flexible system to analyze the RF performance of materials over a wide range of temperature and RF field level at multiple frequencies, which can rapidly be adjusted for parameter scans. The surface resistance can be measured down to nano-Ohm resolution.
Capabilities
- Measure surface resistance vs RF magnetic field (up to 120 mT)
- Measure surface resistance vs temperature (1.5 K - > 20 K)
- Measure surface resistance vs RF frequency (@417 MHz, 850 MHz, 1300 MHz)
- Measure superheating field
- Measure penetration depth
- Perform trapped flux studies
- Measure Tc
