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QXF Quench Protection: issues and plans Giorgio Ambrosio Fermilab QXF Video-meeting August 1, 2013 The HiLumi LHC Design Study is included in the High.

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Presentation on theme: "QXF Quench Protection: issues and plans Giorgio Ambrosio Fermilab QXF Video-meeting August 1, 2013 The HiLumi LHC Design Study is included in the High."— Presentation transcript:

1 QXF Quench Protection: issues and plans Giorgio Ambrosio Fermilab QXF Video-meeting August 1, 2013 The HiLumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement Work supported by the US LHC Accelerator Research Program (LARP) through US Department of Energy contracts DE-AC02-07CH11359, DE-AC02-98CH10886, DE-AC02-05CH11231, and DE-AC02-76SF00515

2 Outline Status Issues Plans June 18, 2013G. Ambrosio and P. Ferracin2

3 Status See paper presented at MT23; polyimide thickness: 50 um June 18, 2013G. Ambrosio and P. Ferracin3

4 Status See paper presented at MT23; polyimide thickness: 50 um June 18, 2013G. Ambrosio and P. Ferracin4

5 Issues With present assumptions T hot-spot is too high We need to have redundancy We need to protect these magnets at 90% of ssl for training June 18, G. Ambrosio and P. Ferracin

6 Open questions and Action Items Conductor: – T hot-spot is lower if bronze is included in the computation  measure impact of bronze on strand/cable electrical conductivity at 300 K (after HT) June 18, G. Ambrosio and P. Ferracin

7 Open questions and Action Items Heaters optimization: – What is the “best design” w present technology? – What is the correct heater delay time with best design? – What is the correct time to quench the whole OL?  Test LHQ coil with different heaters and compare with simulations Possible advantages in exploring “best design” for HQ03? June 18, G. Ambrosio and P. Ferracin

8 Open questions and Action Items Heaters optimization: – Can we reduce heat diffusion time and/or increase dielectric strength? Minimize polyimide and add layer of different material Use doped polyimide Use alternative material btw trace and coil – Can we have heaters btw layers? – Can we have heaters on IL w/o bubbles?  How can we test options faster than in a mirror? June 18, G. Ambrosio and P. Ferracin

9 Open questions and Action Items Simulations: – Are simulations conservative? How much?  Compare HQ simulations with HQ02 test results Improve simulation of inner layer quench; … – Do we have dynamic effects with a small dump?  Do HQ02 tests and simulations with small dump  Start analysis of dynamic effects (if present w small dump)  Rerun QXF analysis after the previous points have been addressed June 18, G. Ambrosio and P. Ferracin

10 Open questions and Action Items Redundancy – Can we use CLIQ to have a redundant QP system?  Do analysis of CLIQ on MQXF  Test is on HQ02/03? – If not, what is the best lay-out for providing enough redundancy? June 18, G. Ambrosio and P. Ferracin

11 Open questions and Action Items Tests: – LHQ coil test for heater optimization – HQ02 for dynamic effects with small dump – Test CLIQ on HQ02/03? – What is the maximum acceptable T hot-spot ?  Do high-MIITs test on HQ02 June 18, G. Ambrosio and P. Ferracin

12 Plans Working groups are going to address questions and action items A new task force will coordinate and steer the whole effort June 18, G. Ambrosio and P. Ferracin


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