SRF Cavity Testing Using a FPGA Self Excited Loop
- Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
This document provides a detailed description of procedures for very-high precision calibration and testing of superconducting RF cavities using digital Low-Level RF (LLRF) electronics based on Field Programmable Gate Arrays (FPGA). The use of a Self-Excited Loop with an innovative procedure for fast turn-on allows the measurement of the forward, reflected and transmitted power from a single port of the directional coupler in front of the cavity, thus eliminating certain measurement errors. Various procedures for measuring the quality factor as a function of cavity fields are described, including a single RF pulse technique. Errors are estimated for the measurements.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- SC0012704
- OSTI ID:
- 1458517
- Report Number(s):
- C-A/AP/591; CERN-ACC-NOTE-2018-0039; BNL-114286-2017-TECH; TRN: US1901674
- Country of Publication:
- United States
- Language:
- English
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