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Matthias Liepe Zachary Conway CLASSE, Cornell University June 1, 2009

Explore high-field gradient SRF cavities for the International Linear Collider with accelerated R&D to improve technology and performance. Join the global effort to test, analyze, and diagnose cavity defects.

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Matthias Liepe Zachary Conway CLASSE, Cornell University June 1, 2009

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  1. Testing Superconducting RF Cavities of the Highest Field Gradients for the International-Linear Collider Matthias Liepe Zachary Conway CLASSE, Cornell University June 1, 2009

  2. What is the ILC? • ILC = International Linear Collider • The ILC is a proposed electron-positron collider with the ability to scan the center-of-mass energy between 200 and 500 GeV. • The two driver linacs for the ILC are designed around 1.3 GHz superconducting-niobium radio-frequency cavities, operating with an accelerating gradient of ~31.5 MV/m. • ~16,000 cavities are required. Zachary A. Conway

  3. What is the ILC? The 16,000 cavities are in 850 cryomodules Zachary A. Conway

  4. The ILC Cavities • The superconducting radio frequency (SRF) ILC cavities must perform at the limits of today’s technology. • Twenty years of R&D has advanced the understanding and the technology behind SRF cavities. • We are almost there. Today, only a small fraction of all cavities produced pass ILC acceptance tests. AKA, operate with an accelerating gradient above 35 MV/m. Zachary A. Conway

  5. Goals for the summer • Contribute to the international effort advancing the science and technology of SRF cavities. • Help test ILC cavities • Analyze the cavity performance • Help diagnose cavity defects which limit the cavity performance. • You will deal with a subset of: • low-temperature superconductors • E&M resonant cavities • Basic principles of SRF cavity preparation, testing, inspection, and repair • By the end of the summer, we hope, you will be able to take the results from a cavity test and diagnose what limited the cavity performance. Zachary A. Conway

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