Feather2 in Fresca2 protection studies

Thursday 19 Nov 2020, 14:00 → 15:00 Europe/Zurich

1 Protection scheme and test plan

Speaker: Franco Julio Mangiarotti (CERN)

2020_11_19_Feather2 in Fresca2_ProtectionScheme.pdf

2020_11_19_Feather2 in Fresca2_ProtectionScheme.pptx

* Fresca2 not expected to quench. During energy extraction there may be quench-back distributed across the magnet

* Feather2 mutual inductance calculation may be worst-case because it does not include the copper rings

* Preliminary tests: may be better to do in increasing IxB order. Add overlay with expected IxB

* also look at maximum expected voltage, voltage difference

2 TU simulations

Speakers: Janne Ruuskanen (Tampere University of Technology), Tiina-Mari Salmi (Helsinki Institute of Physics (FI))

* Model is ready but no resources to run it during the next week

* Simulation case 5: extraction at high current (9 kA Feather2, 10.6 kA Fresca2): high currents in copper rings heat up Feather2. Feather2 current dumps very fast compared to standalone

* Current peak in Fresca2 not visible in the plots, will be checked

3 CERN calculations

Speakers: Glyn Kirby (CERN), Thomas Nes (Twente Technical University (NL))

4 Discussion