BNL FNAL LBNL SLAC HQLHQ Coil Parts Task

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BNL - FNAL - LBNL - SLAC HQ/LHQ Coil Parts Task Force January 6,

BNL - FNAL - LBNL - SLAC HQ/LHQ Coil Parts Task Force January 6, 2012 Coil Parts Task Force Video Mtg G. Ambrosio 1

HQ/LQ Hi. Pot Failures before the test F: Failure (current jumps > 1 mk.

HQ/LQ Hi. Pot Failures before the test F: Failure (current jumps > 1 mk. A) L: Current rises continuously, to > 1 mk. A S: Short (few W – tens of k. W) Coil PHA 01 F, F PHA 02 F, F PHB 01 F PHB 02 F, F, F LE IL Endshoe F, F, F, L LE OL Endshoe F, F, S, F RE IL Endshoe RE OL Endshoe Island HQ, LQ PHA 02 PHB 01 PHB 02 LE IL Endshoe S S F, L, L, L F, F RE IL Endshoe F L S, S L, F L, S, S, F, S

HQ/LQ coil failures during/after the test F: Failure (damage) S: Short Coil PHA 01

HQ/LQ coil failures during/after the test F: Failure (damage) S: Short Coil PHA 01 F, F PHA 02 F PHB 01 S PHB 02 S HQ, LQ PHA 02 PHB 01 PHB 02 LE IL Endshoe LE OL Endshoe RE IL Endshoe RE OL Endshoe Island S, S OL RE Spacer S

Issues and Remedies - I v Endshoes to coil/endshoe/heaters § BNL (LQ) OL instrumentation

Issues and Remedies - I v Endshoes to coil/endshoe/heaters § BNL (LQ) OL instrumentation procedure Action Items: § Replace saddles and extensions after HT with - Set specifications for coating insulated parts - Explore coating at 3 insulation labs • What (adhesive Kapton, coating, …)? - Decide coating material • What to doand withthickness available parts (remove some mills from selected surfaces, …)? Coil Parts Task Force Video Mtg Short term: add 2 mil Nomex, and reduce S 2_layer on OD (coil #15) Mid term: remove 10 mil from OD, and add coating on OD and cable surface (#17) Long term: new parts with less material on all surfaces, rounded edges, and coating on all surfaces. G. Ambrosio 4

Issues and Remedies - II v Heaters to coil § Reinforce insulation under heaters

Issues and Remedies - II v Heaters to coil § Reinforce insulation under heaters • How much? – Quick check of QP Action Items: • How much can fit the present HQ design? - Design procure new heaters § and Change heater design in order to avoid critical areas Short term: add 2 mil Kapton, and reduce S 2_layer on OD (coil #15) Mid term: … + new heater design (#16) Long term: after test results assess if 2 layers of Kapton are OK (if not: 3 mil E-glass/ other materials) Coil Parts Task Force Video Mtg G. Ambrosio 5

Issues and Remedies - III v Island spacers to coil § Reinforce insulation around

Issues and Remedies - III v Island spacers to coil § Reinforce insulation around ramp • How to do it (part modification, …)? § Coating/anodization/… • Start from island because of 2 times higher voltages, more likely to see quenches § Winding around end parts • Meeting with techs Coil Parts Task Force Video Mtg Short term: - NA Mid term: remove ? ? from parts (? ), and/or add coating Long term: new parts with less material on all surfaces, rounded edges, and coating on all surfaces 6 - Including G. wedges? Ambrosio

Coating Specs v Two options re HT: § Heat treatment resistant (up to 700

Coating Specs v Two options re HT: § Heat treatment resistant (up to 700 C in Argon) § No HT resistant (back up) v Cooldown resistance § Down to 2 K v Voltage breakdown § > 1 k. V v Compatible with potting § Epoxy, Cynate_Ester, Matrimid v Good bonding strength after several thermal cycles 2 – 300 K v ESH compliant Coil Parts Task Force Video Mtg G. Ambrosio 7

Coil Parts Task Force Video Mtg G. Ambrosio 8

Coil Parts Task Force Video Mtg G. Ambrosio 8

Other suggestions v By Maxim: § Trace layer thickness: study how it affects heat

Other suggestions v By Maxim: § Trace layer thickness: study how it affects heat transfer vs electrical integrity § Shoe-to shoe: thicker insulation is needed § Voltage tap traces may be shorting to LE OL Endshoe § Heater may be punched by Endshoes edges èAdd “Rounding of edges” to drawings and travelers v Other suggestions? Coil Parts Task Force Video Mtg G. Ambrosio 9

Coil Parts Task Force Video Mtg G. Ambrosio 10

Coil Parts Task Force Video Mtg G. Ambrosio 10

Coils Assembly and Alignment Keys Coil & heater Collars LARP DOE review, FNAL June

Coils Assembly and Alignment Keys Coil & heater Collars LARP DOE review, FNAL June 1 -2, 2011 S. Caspi, LBNL 11