CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL1

Insulation Status for QXF Cables

D.R. Dietderich, LBNLLARP-CERN Collaboration meeting

April 9, 2013

bnl – fnal – lbnl – slacUS LHC Accelerator Research Program

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL2

Outline

• Status of QXF R&D– Target Thicknesses

• 0.125 mm or 0.150 mm per side

• HQ/LHQ insulation R&D experience– HQ/LHQ Target thickness

• 0.100 mm per side

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL3

NEW QXF Insulation R&D

• New England Wire (NEW)• Target thickness 0.150 mm

per side• AGY S2-glass fibers (66

tex) with 933 silane sizing• 2 ply fibers twisted with a

pitch length of 3”.  • 48 carriers• Braided has 15.4 P/I

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL4

Braid Thickness

• Reference pressure is 1,000 ksi

• ~18.2 P/I to obtain 0.150 mm

• ~12.4 P/I to obtain 0.125 mm

y = 0.0044x + 0.0694

0.125

0.13

0.135

0.14

0.145

0.15

12 14 16 18 20Picks per inch

Th

ickn

ess

per

sid

e (m

m)

R&D results

Extrapolated

Linear (R&D results)

R&D Results

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL5

New England Wire Braid on QXF Cable

Flat-bed scanner image of three cables

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL6

Insulation 14.1 P/I

Grey-scale image of the selected area

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL7

Number of pixel: 1028176 Number of white pixel (threshold 170): 973336 (94.67%)

Number of black pixel: 54840 (5.33%)

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL8

CM20 Meeting April 9, 2013 D.R. Dietderich, LBNL9

Summary and Plans

• Have 0.130 mm thickness • 2 ply braid may produce insulation with target

thickness of 0. 125 mm and 0.150 mm with either 12.4 P/I (picks per inch) or 18.3 P/I, respectively

• Do not plan to make any new R&D runs for 2 to 3 months

• Going to focus on QXF cable R&D