1. QXF Cable with Annealed Wire D.R. Dietderich QXF Working Group Video Meeting, Feb. 12, 2014

2. 2Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich QXF Cable Parameters Mid-thickness = 1.525 mm +/- 0.010 mm Width = 18.15 mm +/- 0.050 mm K.S. angle = 0.55 deg. +/- 0.10 deg. Pitch Length= 109 mm +/- 3 mm To be determined – Annealed or un-annealed wire Need to assume that cables will have to be managed during coil winding – By using either the winding block or CTD binder

3. 3Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich RRP Wire in Cables Same billets in cables 1048Z and 1049Z – RRP 14070 and 14397 Billets in cable 1050Z – RRP 14396, 14516, and 14721 Billets in cable 1051Z – RRP 14394 and 14396 All billets RRP 108/127 – Standard Sn – Nb-Ta filaments Future billets for project or 132/169 – 5% reduced Sn to retain high RRR – Pure Nb filaments – Doped with Ti via a Nb-47 wt.% Ti rod

4. 4Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Damage Score Method for Cable 1048Z (Un-annealed) How is the damage score determined? The number of sheared sub-elements in the wires at the each edge of the each cable is determined. This sum is then divided by the number of wires at each edge, i.e. T and Q has 3 wires while R has only 2. A “Damage Score” is the average for each edge to the number of cables used, i.e. 6. For the minor edge the score is: (0+2.66+0+0+3.66+2.33)/6=1.44 However, if one only count edges with T’s then the damage scores are: – Minor: (2.66+3.66+2.33)/3=2.88

5. 5Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Damage Score QXF Cable 1048Z – Wire as received (un-annealed) Billet Ta doped with Reg. Sn

6. 6Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Damage Score QXF Cable 1049Z – Annealed Wire 10 170 C for 15 hrs. Failed self-bend test Billet Ta doped with Reg. Sn 10/12 strands

7. 7Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Triplet Only Scores for Front and Tail-end of Cable Annealed wire has fewer sheared sub- elements By a factor of ~3 1042Z-12 Thin Edge

8. 8Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Highest Score in Strand This may be the best method if one assumes that the RRR at the edge of a cable is determined by the wire with the highest number of sheared sub-elements

9. 9Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich

10. 10Feb. 12, 2014QXF Cable R&D -- Annealed Wire - D.R. Dietderich Damage Score vs. OXF Cable Width for Pitch Length of 109 mm 18.47 mm calc. width for 109 mm Need 17.95 mm width for Cable Winding score of zero 1042Z-13 Target = 18.15 mm RRP 108/127, ~1.50 mm thick