1. Solid-state based 60 kV 15 kA switch for the SPS vertical beam dumping kicker magnet L. Ducimetière, P. Faure, V. Senaj

2. Proposed strategy, discussion 1.Analysis of strong and weak points from LBDS experience Keep / reinforce strong points Improve weak point (fault analysis, etc.) 2.Further analysis Possible faults and consequences Redundancy Trigger specifications (rise / fall times, amplitude, duration,...) Trigger architecture (# of PTU’s / outputs, connections, …) Retriggering Slow surveillance (GTO voltage sharing surveillance, oil level / temp / opacity, spark detection, classical surveillance… ) Fast surveillance (erratic, missing, magnet spark, …) and actions... 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms2

3. Strong and Weak points from LBDS experience Table to be completed TypeLBDSProposed action RedundancyStrongKeep, proposed improvement ? RetriggeringStrongKeep, proposed improvement ? Passive trigger transformer StrongKeep, use fast-type 1/10 GTO surveillanceWeakUse voltage-> frequency converter + optical link ? Air insulationWeakOil immersion Gate contactWeakRing gate, soldered x4 PTU connectionWeakBolted lugs... 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms3

4. Design considerations – Power circuit 20 series-connected GTO’s Folded stack (2x10 GTO’s) 2 stacks in parallel --> Quad-Stack Switch (QSS) Ring gate GTO’s Low inductance stipline connections ‘Box in the box’ 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms4

5. Study status – Power circuit (1) 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms5

6. Study status – Power circuit (2) 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms6

7. Study status – Power circuit (1) 04/02/2015L. Ducimetière - Strategy meeting SPS-MKDV 2 Ohms7 Surveillance circuit (TBD) Snubber capacitors Soldered gate contacts