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- W2189066514 abstract "For the Large Hadron Collider (LHC) at CERN, 21 superconducting 400 MHz single cell cavities have been produced by ACCEL using the technology of coating niobium on copper cavities. This technology was developed by CERN and transferred to industry within the scope of the LEP 200 project. The guaranteed values for the gradient and unloaded quality factor at a bath temperature of 4.5 K are E acc = 5 MV/m and Q 0 (5 MV/m) = 2·10 9 . The cavities have been tested in a vertical test stand at CERN. All cavities exceeded the guaranteed values, the best quality factor at 5 MV/m was 2.6 ·10 9 . During the vertical test gradients up to 10.5 MV/m were observed with Q 0 > 10 9 at 4.5 K. At a bath temperature of 2.5 K gradients up to 14.5 MV/m with Q 0 > 2.5·10 9 have been reached. For future applications such as high intensity proton linear accelerators, superconducting cavities designed for acceleration of particles with a velocity in the β range between 0.4 and 0.9 are desirable ( β = v/c, v = velocity of particle, c = speed of light). ACCEL has produced two single cell β = 0.8 cavities in a collaboration with Mitsubishi Electric Corporation (MELCO). The performance of this cavities is already close to the theoretical values. Further improvement can be accomplished by iteratively optimizing the coating parameters in the next step of R&D phase." @default.
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- W2189066514 date "1999-01-01" @default.
- W2189066514 modified "2023-09-27" @default.
- W2189066514 title "PRODUCTION OF NB/CU SPUTTERED SUPERCONDUCTING CAVITIES FOR LHC" @default.
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