Tuned CT - Bergoz Instrumentation - #1

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For beam loss monitoring in low energy hadron accelerators Measures current difference between two monitoring points with 0.05% resolution. E.g. measures 5% loss with 1% resolution To keep machine activation low enough for hands-on maintenance, personnel safety and environmental protection To protect machine parts from beam radiation damage To achieve efficient beam transport To measure beam loss along an accelerating structure, when no secondary particles can exit the vacuum chamber, the only option is to measure the beam current at regular intervals. Non-interceptive current transformers can be used for this purpose. But wideband transformers cannot measure the beam current accurately because their response is dependant on the frequency spectrum, thus dependant on the bunch width. Tuned-CT is a narrowband transformer tuned to the beam fundamental frequency. Its output is a nearsinewave independant of the bunch width. It is therefore a solution when beam loss must be measured in low-energy hadron accelerators, an area where, so far, no non-destructive diagnostics existed. Resolution < 5E-4 Stability < 5E-4 Thickness 40 mm No noticeable temperature dependance No dependance on external magnetic fields Radiation resistant Bakable Vacuum down to 1E-10 mbar on option Shown on picture: PEFP Tuned-CTs (non-Conflat flanges) The Tuned-CT was developed in collaboration with KAERI the Korean Atomic Energy Research Institute and PAL Pohang Accelerator Laboratory, to measure beam loss along the PEFP acceleration path. V.2.0 Tuned-CT Narrowband Current Transformer