BNL FNAL LBNL SLAC LHQ Goals and Status

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BNL - FNAL - LBNL - SLAC LHQ Goals and Status Giorgio Ambrosio Fermilab

BNL - FNAL - LBNL - SLAC LHQ Goals and Status Giorgio Ambrosio Fermilab 2 nd LARP / Hi. Lumi Collaboration Meeting FNAL May 7 -9, 2012 LHQ Task Leaders: Coil Fabrication + Instrum & Traces – J. Schmalzle (BNL), R. Bossert and M. Yu (FNAL), R. Hafalia (LBNL) Mechanical Structure & Assembly – H. Felice (LBNL) Test preparation and test – G. Chlachidize (FNAL) Materials – A. Ghosh (BNL) and D. Dietderich (LBNL) 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 1

LHQ Features & Goals • LHQ is the main “Nb 3 Sn technology demonstrator”

LHQ Features & Goals • LHQ is the main “Nb 3 Sn technology demonstrator” • • — For technology selection for the LHC IR upgrade — Deadline: 2014 -15 Aperture: 120 mm (as HQ) Coil x-section: 2 nd generation HQ Coil length: 3. 4 m (~as LQ) Success criteria: — Nominal gradient = 80% of SSL based on extracted strands • HQ/LHQ Grad ~ 160/175 T/m (@ 4. 2/1. 9 K) — Quenches to nominal gradient: 3 — Quenches to 110% of nominal gradient: 10 — Quenches to nominal gradient after therm. cycle: 1 — Magnetic requirements from HL-LHC Design Study 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 2

Conductor • Strand for LHQ: — 0. 778 mm — OST RRP 108/127 •

Conductor • Strand for LHQ: — 0. 778 mm — OST RRP 108/127 • • Jc: > 2650 A/mm 2 (4. 2 K 12 T) Jc: > 1400 A/mm 2 (4. 2 K 15 T) Cu/non_Cu: 1. 22 Effective Filament size: ~52 um — Ta or Ti doping • Ta for practice coils • 5 UL with Ta and 5 UL with Ti for LHQ 01/02 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 3

Cable and Insulation • Cable: — With 25 um stainless steel core — As

Cable and Insulation • Cable: — With 25 um stainless steel core — As in “ 2 nd generation” HQ coils • Insulation: — 0. 1 mm per side — Baseline: braided S 2 glass • Tests in progress at NEEW: 15 mm wide cable. 1 st trial with S 2 glass with 933 binder, 15 m 14. 8 mm wide cable. 2 nd trial with S 2 glass with 933 binder, 97 m 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 4

Cross Section • LHQ X-Section = Revised HQ X-Section — thinner and less wide

Cross Section • LHQ X-Section = Revised HQ X-Section — thinner and less wide cable — Improved insulation strength: • 500 um layer-layer insulation • Coating of metal parts • Thicker insulation under protection heaters — New design of saddle extensions for electrical connections 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 5

Coil Fabrication Technology • Same coil fabrication technology of revised HQ — winding (Ti-Al-V

Coil Fabrication Technology • Same coil fabrication technology of revised HQ — winding (Ti-Al-V pole parts) — curing of ceramic binder (CTD 1202) — potting (CTD 101 K) — reaction (T = 210, 400, 650 °C) • 650 °C plateau for 48 hours • Long coil features: — gaps among pole pieces (for longitudinal diff. CTE) • 4 mm/m as in latest HQ coils — Lifting and handling procedures used for LQ coils 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 6

Cooling channels through pole/island 2. 5% 2. 4% 3. 2% 2. 7% Using existing

Cooling channels through pole/island 2. 5% 2. 4% 3. 2% 2. 7% Using existing holes Middle long keys: 6 pairs A =7054. 51 mm 2 Φ 6. 73 δ = Ahole/A 0. 45% Φ 6. 73 0. 45% Φ 5. 11 0. 29% Φ 6. 73 0. 45% Φ 6. 73 in mm 0. 45% Σδ = 2. 4% 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 7

Supporting Structure • Supporting structure: — X-section: LHQ = HQ • With holes for

Supporting Structure • Supporting structure: — X-section: LHQ = HQ • With holes for cooling — Scale up-features similar to LQ • Segmented shell (4) • Al-collars, pads and yoke made of laminations • Masters and keys 2 m long Dedicated talk in this session 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 8

Quench Protection • Analysis performed with Quench. Pro and Roxie • Experimental data from

Quench Protection • Analysis performed with Quench. Pro and Roxie • Experimental data from HQ (1 m) and LQ (4 m) — LHQ can be protected by extracting some energy (R = 40 m. W) and using LQ type heaters on coil ID and OD — T peak < 400 K (without quench back) — V max < 1000 V Dedicated talk in this session 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 9

Test • Test at FNAL VMTF: — T = 4. 6 – 2. 3

Test • Test at FNAL VMTF: — T = 4. 6 – 2. 3 K • no superfluid He with present top plate FNAL structural plate — support similar to HQ test at CERN — new He recovery line — new warm bore for magnetic measurements: • 63 -68 mm ID FOUR SUSPENSION RODS 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 10

LHQ Schedule | 2012 | 2013 | 2014 | 2015 Tooling and parts procurement

LHQ Schedule | 2012 | 2013 | 2014 | 2015 Tooling and parts procurement Practice coils Coil test in mirror Structure develop. & mech. model LHQ 01 coils (5) LHQ 01 assembly & test LHQ 01 b assembly & test LHQ 02 coils (5), assembly & test 4 + 10 coils, 1 coil test, 3 magnet tests by Fall 2015 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 11

Conclusions • The LHQ is LARP’s last step for demonstrating Nb 3 Sn technology

Conclusions • The LHQ is LARP’s last step for demonstrating Nb 3 Sn technology for the LHC Luminosity Upgrade • It builds upon the whole LARP R&D (HQ, LQ, …) with contributions from other programs • LHQ magnet test results are expected in 2014 - 15 For more Luminosity at the LHC! 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 12

Additional slides 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ

Additional slides 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 13

Fabrication and Test Plan • Cable: — Cabling: LBNL — Insulation: NEEW (or other

Fabrication and Test Plan • Cable: — Cabling: LBNL — Insulation: NEEW (or other vendor) • Coils: — Winding & curing: FNAL — Reaction & potting: BNL, LBNL — Instrumentation: BNL, FNAL, LBNL — Shipment structure (long version of HQ one): BNL • Structure: — Pre-assembly & magnet assembly: LBNL — Shipment similar to LQ • Test: — Warm and cold measurements: FNAL 2 nd LARP / Hi. Lumi Collaboration Mtg, May 9, 2012 LHQ Goals and Status – G. Ambrosio 14