Helene Felice 02/15/2013 HiLumi Meeting HQ Program HQ02 Plans for assembly Helene Felice 02/15/2013 HiLumi Meeting HQ Program

Outline Magnet overview HQ02 Assembly plan - Key focus areas Assembly: timeline 02/15/2013 H. Felice

Overview of the HQ magnet parameters 4.3 K 1.9 K Typical Iss 17.3 kA 19 kA Gradient at Iss 195 T/m 213 T/m Peak Field at Iss 13.6 T 14.8 T Stored energy at Iss 0.9 MJ 1.1 MJ Fx per octant per unit length at Iss 2.7 MN/m 3.15 MN/m Fy per octant per unit length at Iss -3.9 MN/m -4.7 MN/m Fz per magnet end at Iss 1.06 MN 1.28 MN In absence of HQ02 short sample limit, the HQ01e numbers will be used as references in these slides 02/15/2013 H. Felice

Structure and assembly steps overview Collar-pack assembly 4 collars bolted against the full length G10 keys Shimming of the alignment key to ensure contact between collar and keys Coil-pack assembly 4 pads bolted around the collars Final assembly and loading Master/bladders and Keys stack is prepared based on coil-pack assembly Insertion of the coil-pack in the yoke shell sub-assembly by sliding on the bottom masters Insertion of the side and top masters Masters include load keys and bladders + pull shims Key parameters to watch Preload level Alignment: collar and key must be in contact Preload uniformity Coil-pack assembly Collar pack assembly Bladder slot Master 02/15/2013 H. Felice

HQ02 Azimuthal Preload Target Room temperature preload transfer function Conservative Target preload ~ 200 T/m Target Preload at 300 K: eq shell / pole = 863 me / -450 me sq shell / pole = 66 /-63 MPa Target Preload at 4.2 K: eq shell / pole = 1905 me / -720 me sq shell / pole = -169 / -147 MPa 02/15/2013 H. Felice

Focus area # 1: Alignment (I) Room temperature preload transfer function Different transfer function depending on: collar / key contact or absence of contact 02/15/2013 H. Felice

Focus area # 1: Alignment (II) Room temperature preload transfer function Different transfer function depending on: collar / key contact or absence of contact HQ01a-b: no alignment HQ01c-d-e: alignment Importance of key/collar shimming Use of pins and feeler gauges to quantify gaps 02/15/2013 H. Felice

Focus area #2 Preload distribution and uniformity Previously HQ assemblies and previous LARP magnets exposed the importance of matching the coil OD to the collar/pad ID Preload distribution on the coil OD can be controlled by adjusting the radial shims Attempt to correlate with CMM measurements Adjustment made using Fuji pressure sensitive film during collar pack assembly 2 IR collars available 02/15/2013 H. Felice

Focus area #2 Preload distribution and uniformity among coils HQ01d HQ01e Assembly Assembly θ = -62 6 MPa θ = -43 20 MPa Adaptive shimming made based on coil pole SG readings improved preload uniformity among coils Excitation Coil 8 Excitation Coil 8 02/15/2013 H. Felice

Focus Area #3 Apply a conservative preload to avoid degradation 02/15/2013 H. Felice

HQ02 Preload Target summary Conservative Azimuthal Target preload ~ 200 T/m Target Preload at 300 K: eq shell / pole = 863 me / -450 me sq shell / pole = 66 /-63 MPa Target Preload at 4.2 K: eq shell / pole = 1905 me / -720 me sq shell / pole = -169 / -147 MPa Axial Preload sz rod = 60 / 160 MPa Axial preload was never an issue in HQ Fuji paper used to evaluate ideal radial shimming Adaptive shimming is a possible option if spread between SG is larger than 10 MPa 02/15/2013 H. Felice

Timeline By the end of the week: coil arrangement Week of 02/18/2013: Iteration on collar pack assembly Week of 02/25/2013 Coil pack finalized Electrical QA of the coil-pack Coil pack insertion in the yoke-shell sub-assembly Coil end-shoe preparation for axial pushers and bullets Week of 03/04/2013 Azimuthal and axial Preload Starting week of 03/11/2013 Electrical QA before pizza-box assembly Pizza-box assembly Instrumentation prep for testing at FNAL … 02/15/2013 H. Felice

Additional Material

Coil pole SG during assembly HQ01c HQ01d HQ01e 02/15/2013 H. Felice

Shell SG during assembly HQ01c HQ01d HQ01e 02/15/2013 H. Felice

HQ01d Coil sq distribution 02/15/2013 H. Felice

HQ01 baseline 02/15/2013 H. Felice

Azimuthal HQ01a Preload Targets Initial preload target based on Gss = 219 T/m at 19.6 kA (design values) Targets: eq shell = 1028 me at 300 K and 2086 me at 4.2 K eq pole = -536 me at 300 K and -828 me at 4.2 K In terms of stress sq shell = 78 MPa at 300 K and 185 MPa at 4.2 K sq pole = -76 MPa at 300 K and -159 MPa at 4.2 K 02/15/2013 H. Felice