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Quench Antenna Discussion Summary

This is a biweekly meeting to discuss progress and plans related to the quench antenna project. The meetings include updates on past meetings, upcoming tasks, and short-term plans. The discussion covers various topics such as mechanical structure, channel numbering, gain settings, quench propagation, and assembly drawings.

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Quench Antenna Discussion Summary

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  1. Quench Antenna Discussion Summary Meeting every Friday at 8/10/11am (LBNL/FNAL@IB2/BNL) Past Meetings Kick-off June 07 June 14 https://indico.fnal.gov/event/21024/ June 21 https://indico.fnal.gov/event/21063/ June 28 https://indico.fnal.gov/event/21111/ July 12 https://indico.fnal.gov/event/21211/

  2. To Do / Laundry list • Top priority: • Overlay drawing of the QA with mechanical structure is top priority to identify quench location on structure. – Input from Dan is needed! • To Do • Confirm the channel numbering in DAQ and Antenna (BNL) – done • QA disk distance measurement with tape measure (BNL) – done • Generate an assembly drawing (BNL) – done • Check the gain settings (BNL) – done • Determine the mechanical center of the magnet w.r.t. QA location • Check interface box has capacitors or not,  have them identical.  – done • Check orientation, idea is the coil looks at the inner layer – done • Quench propagation in low field region estimate (Giorgio) • Inner layer: 8mm/ms - done • This will determine the QA distance needed

  3. Short term plan, • Next test in next Thermal cycle with better coverage of QA. 8mm/ms with ~10ms: 16cm spacing or 25 elements needed, e.g. 50 channels. – 2nd thermal cycle cancelled, adapt for A3 • Maxim • Send existing PCB boards and parts to BNL, and schematics for assembly.  – done • Send interface board drawing to BNL – done • BNL • Assemble PCB boards – start week Aug05 • Assemble interface box – not needed • Assemble a cable for 8+1 channels – start week Aug05 • 32 more channels available, cards would need to be bought, 4 more cards ($2.2k/card).  – done • Measure the extra resistors on the boards to ensure is everything is the same – done • Change DAQ range from 1V to 100mV – done • Plastic spacer manufacturing and procurement - get the right length (maybe Maxim has spares).  • -> 3D printed version to go forward as no savings with Delrin rod possible. – done • PCB boards are notched – done • All of them

  4. Before next test • Confirm QA gain settings, and test of full assembly with long cables before insertion. – done • Fermi: • Investigate how more elements can be added. Check if alternative to PCB antenna exists, can be made or re-used (suggestion Stoyan/Joe DiMarco design). • Discuss cost with L2

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