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RF Cavity Update: Latest Developments in Mechanical Engineering

This update covers the latest information on RF cavity developments as of February 2005, including sources like the MICE website, schematic drawings, presentations, and discussions with experts like Steve Virostek and Bob Rimmer. Changes in coupling coils and cavity design are highlighted, with insights into current status, test conditions at Fermilab, future phases, and ongoing collaboration with IC for tuning and support equipment. The text emphasizes key points such as prototype testing, design work progress, and challenges in defining cavity and shell parameters for manufacturing, operations, and design constraints. Stay informed with this comprehensive update.

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RF Cavity Update: Latest Developments in Mechanical Engineering

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  1. RF Cavity update Feb 2005 G. Gosling Mech Eng.

  2. Sources of latest information • MICE web-site (schematic drawings) • Derum Li presentation to LBNL colab. mtg • Discussions with: • Steve Virostek (LBNL) • Bob Rimmer (jLab)

  3. Coupling coils now defined. Greater spacing between cavities Main change - All cavities now identical and independent of each other.

  4. Current status • Port formation problem is now believed solved. • First 2 Be windows failed, third due soon and there is confidence from the supplier. • Cavity requires further electro-polishing before testing. • Cavity will be tested at Fermilab under non-representative external conditions.

  5. Fermilab test conditions • Cavity will be rigidly bolted through both stiffener rings to free-standing fixture. • Cavity will work in atmospheric conditions under internal vacuum. • Tuning will be conducted manually and must compensate for operating pressure difference.

  6. Next phase • Prototype cavity off for finishing and test at Fermilab – April 2005. • No current design work ongoing at LBNL. • IC to get involved and assist with design of tuning and cavity support equipment.

  7. RF 2D view

  8. Problems • Define Cavity and Shell parameters for: • Manufacturing tolerances • Physical properties • Behaviour under running conditions • Operators’ requirements • Design constraints • Materials, processes, available space.

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