| Paper | Title | Page |
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MOPP042 |
Validation of FRIB Fundamental Power Couplers at MSU | |
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Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661. For the FRIB driver linac, two different types of fundamental power couplers will be used to provide cw rf power to four cavity types. A cold window design is being used to power the two 80.5 MHz QWR cavity types for β=0.041 and β=0.085. A warm window design is being used to power the 322 MHz HWR cavity types for β = 0.29 and β = 0.53. Topics discussed include coupler preparation & assembly methods, acceptance criteria, diagnostics and RF conditioning. |
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TUPP044 |
Validation of FRIB SRF Coaxial Resonators at MSU | |
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Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661 Michigan State University is currently testing production cavities as part of final validation of fully dressed 80.5 MHz β=0.085 quarter wave resonators (QWR) and β=0.53 half wave resonators (HWR), which are being produced for a driver linac for the Facility for Rare Isotope Beams. This paper updates the developments for the FRIB and ReA resonators as preparations at MSU are being made for production runs. |
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| THPP046 | SRF Highbay Technical Infrastructure for FRIB Production at Michigan State University | 954 |
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Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE- SC0000661 Michigan State University (MSU) has funded the construction of a new 27,000 square foot high bay building to house the Superconducting Radio Frequency (SRF) infrastructure for the Facility for Rare Isotope Beams (FRIB) production requirements. The construction has been completed and beneficial occupancy began on May 19th, 2014. The new SRF highbay includes over 4,000 square feet of cleanroom and chemistry facility space, automated cavity etch tools, ultra pure water systems, cold mass component inspection area, hydrogen degassing furnace, SRF testing capabilities for three vertical test Dewars and two horizontal cryomodule test bunkers with dedicated helium refrigeration system. The status of the technical equipment design, installation and commissioning will be presented. |
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THPP047 |
Integrated Testing of SRF Resonators with Couplers and Tuners in the Vertical Test Configuration at MSU | |
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Funding: This material is based upon work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661. A robust and extensive program of testing using the superconducting cavity vertical test facility at MSU has been used to validate cavities and ancillary systems for FRIB. The facility has been used to validate final designs of dressed HWR & QWR cavities with integrated tuners and LLRF control systems. In each test (QWR & HWR), the FRIB coupler is working at the full rated power at the full cavity field for long term operation integrated with the FRIB LLRF controller. The final validation of the SRF subsystems are achieved with long term stable lock with FRIB specified parameters for amplitude and phase control. Topics discussed include the dynamic loads of couplers and tuners, microphonics affects & QWR mechanical mode damping, and the model used to predict RF BW requirements for stable operation based on fundamental design parameters. |
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