Slide 1

HQ Coil 18 Test Impregnation LARP Video Meeting November 21, 2013 Dan Cheng Slide 2 HQ Coil 18 Status HQ Coil 18 was impregnated Impregnation was designed to test the effect of trace lamination layer thicknesses Used both.001 and.002 additional Kapton layers on traces Examined materials, and improved processing Also incorporated splice insulation changes Utilized new batch of CTD epoxy Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 2 Slide 3 Coil 18 Trace Prep Procedures Instrumentation Trace Wipe down with alcohol Rough up surfaces with Scothbrite pad Wipe with Acetone, then alcohol Tin solder pads Lamination layer Wipe with alcohol Rough up surface with Scotchbrite pad Wipe down with acetone, alcohol Lamination Apply.375 wide strip of Scotch VHB transfer tape down center Apply lamination layer to trace (handled using gloves) Cut VT slits (not done for this coil) Perforate trace layers with hole pattern Apply to coil Solder connections (not performed) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 3 Slide 4 Trace Lamination Layer Layout Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 4 OL RE:.001 Kapton, Plain OL LE:.002 Kapton, Plain IL RE:.002 Kapton layer IL LE:.001 Kapton, B-Stage* * It is possible that earlier coils (11-14) might have used a.001 Kapton that had Scotch 2290 B-stage epoxy applied to one side (matl was not clearly labeled). Slide 5 Coil Impregnation Coil pre-heated to 60C and pumped down overnight Pressure based outSlide 6 IL RE (.002 Kapton) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation6 Slide 7 OL RE (.001 Kapton, Plain) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation7 Perforations Slide 8 IL Center (.001 -.002 Transition) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 8 Perforations Transition Slide 9 OL Center (.002 -.001 Transition) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 9 Perforations Transition Slide 10 IL LE (.001 Kapton, B-Stage) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation10 Perforations Slide 11 OL LE (.002 Kapton) Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation11 Perforations Slide 12 RE Endshoe Coverage IL (.002 Kapton) Very good wetting OL (.001 Kapton, plain) Very good wetting Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation12 Slide 13 LE Endshoe Coverage IL (.001 Kapton, B-stage) Virtually unwetted OL (.002 Kapton) Very good wetting Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation13 Slide 14 Coil 18 Trace Layer Performance Summary.002 inner layer RE looks good Soak time and material adequate Endshoe coverage is excellent.001 outer layer RE is okay Soak time may not be adequate Endshoe coverage is excellent Irregular surface over coil possibly affects ability to fill.001 inner layer LE does not look good Soak time not be adequate; material questionable Endshoe coverage is not good B-stage epoxy layer possibly prevents wetting.002 outer layer LE does not look good Soak time not adequate But endshoe coverage is excellent Irregular surface over coil needs more time to fill Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 14 Slide 15 Trace Lamination Conclusions.002 Kapton backing appears to fill trace layers betterif given enough soak time over irregular surface areas.001 Kapton seems to suffer from the effects of irregular surfaces that prevent complete filling.001 Kapton with B-stage seems to prevent wetting of trace layers with epoxyeven extended soak times may not have been adequate These conclusions support our experiences with HQ coils 15- 21 (impregnated with.002 Kapton layers) These conclusions also also seem to support our experiences with the use of.001 layers HQ01-type: Examined in detail Coils 11 & 14 HQ03-type: Coils 22-23 so far observed same behavior Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 15 Slide 16 Additional Slides Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 16 Slide 17 HQ Coil 22 Status HQ Coil 22 has arrived from BNL OL trace shows same lack of fill between trace layers as Coil 23 did SG bonding/installation is on hold until we examine issues in prior magnets/coils (recent LQ/HQ) Can be CMMd while we wait Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 17 Slide 18 Coil 22, As Received Outer layer, REOuter layer, LE Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation18 Slide 19 Coil 22, As Received Inner layer, REInner layer, LE Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation19 Slide 20 HQ Coil 23 Status SG bonding/installation Was completed before decision to examine SG installation Wiring is currently incomplete All processes currently on hold Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 20 Slide 21 HQ Coil 25 Status Reaction fixture has been opened All VTs show continuity, none lost Impregnation preparations on hold Nov 21, 2013 D. Cheng - HQ Coil 18 Test Impregnation 21