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HQ02 Plans for assembly

HQ02 Plans for assembly. Helene Felice 02/15/2013 HiLumi Meeting HQ Program. Outline. Magnet overview. HQ02 Assembly plan - Key focus areas. Assembly: timeline. Overview of the HQ magnet parameters.

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HQ02 Plans for assembly

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  1. HQ02Plans for assembly Helene Felice 02/15/2013 HiLumi Meeting HQ Program

  2. Outline • Magnet overview • HQ02 Assembly plan - Key focus areas • Assembly: timeline H. Felice

  3. Overview of the HQ magnet parameters In absence of HQ02 short sample limit, the HQ01e numbers will be used as references in these slides H. Felice

  4. 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 H. Felice

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

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

  7. 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 H. Felice

  8. Focus area #2Preload 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 H. Felice

  9. Focus area #2Preload 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 H. Felice

  10. Focus Area #3 • Apply a conservative preload to avoid degradation H. Felice

  11. HQ02 Preload Target summary • Conservative Azimuthal Target preload ~ 200 T/m • Target Preload at 300 K: • eqshell / pole = 863 me / -450 me • sq shell / pole = 66 /-63 MPa • Target Preload at 4.2 K: • eqshell / 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 H. Felice

  12. 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 • … H. Felice

  13. Additional Material

  14. Coil pole SG during assembly HQ01c HQ01d HQ01e H. Felice

  15. Shell SG during assembly HQ01c HQ01d HQ01e H. Felice

  16. HQ01d Coil sq distribution H. Felice

  17. HQ01 baseline H. Felice

  18. 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 • sqshell = 78 MPaat 300 K and 185 MPaat 4.2 K • sqpole = -76 MPaat 300 K and -159 MPa at 4.2 K H. Felice

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