Slide 1

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

Slide 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 PTUs / 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. Ducimetire - Strategy meeting SPS-MKDV 2 Ohms2

Slide 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. Ducimetire - Strategy meeting SPS-MKDV 2 Ohms3

Slide 4

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

Slide 5

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

Slide 6

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

Slide 7

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