Speaker
Description
The design of the ten additional CEBAF Upgrade Cryomodules leads to significantly higher fault rates than the 40 original cryomodules, due to sensitivity to microphonics. Cartridges that compress pellets of boron nitride nanotubes (BNNT) are mounted in parallel to the SRF cavities of two refurbished Upgrade Cryomodules. Now substituted into CEBAF, these cryomodules exhibit significant microphonics reduction such that their fault rates are the lowest of all cryomodules in CEBAF. The boron nitride nanotube pellets are developed and manufactured by BNNT LLC of Newport News, Virginia and the cartridge design, testing and installation was sponsored by a Small Business Innovative Research Grant from the US DOE Office of Science, Office of Nuclear Research. The cartridge design, its testing in a two-SRF cavity, Horizontal Test Bed, the details of incorporation into the CEBAF Upgrade Cryomodule and operational data are presented.
Funding Agency
US DOE Office of Science, Office of Nuclear Research, SBIR Grant #DE-SC0018489
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