1 / 12

EMMA Magnet Modelling

EMMA Magnet Modelling. Ben Shepherd ASTeC STFC Daresbury Laboratory EMMA Design Review 26-28 February 2007. Modelling carried out using CST EM Studio. F magnet. D magnet. now with ‘realistic’ steel – details provided by Tesla. Combined model. http://www.cst.com/. 3.0. Reference orbit.

sailor
Download Presentation

EMMA Magnet Modelling

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. EMMA Magnet Modelling Ben Shepherd ASTeC STFC Daresbury Laboratory EMMA Design Review 26-28 February 2007

  2. Modelling carried out using CST EM Studio F magnet D magnet now with ‘realistic’ steel –details provided by Tesla Combined model http://www.cst.com/ Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  3. 3.0 Reference orbit 2.9 Centre of F magnet Centre of D magnet F magnet 2.8 D magnet 2.7 2.6 2.5 2.4 2.3 -0.300 -0.200 -0.100 0.000 0.100 0.200 0.300 EMMA Cell Layout Magnets are now parallel within a cell (JSB, 19 Jan) Outside of ring Ld Lq F D Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  4. EMMA Parameter Sheet • Inscribed radii updated again: • F 36mm • D 53mm • Field clamp plates have been added to the design Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  5. Field Clamps • Tracking studies suggest that field clamps are needed • Reduce the amount of field leaking into the long straight • Symmetric or asymmetric? • Occupy space and increase power demand Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  6. Field Clamps • Integral gradient reduced by 11% (F); 18% (D) • Little effect on good gradient region • No saturation in the clamp plate Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  7. Field Clamps Field at clamp reduced by ~80% in each case F magnet D magnet Difference between asymmetric and symmetric windows is negligible Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  8. Shape Optimisation  • Two variables • tangent point • chamfer size • Optimise in terms of normalised integrated gradient quality integrate vertical field along z 0.1% region differentiate w.r.t x normalise to value at centre of vac chamber Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  9. size of chamfer 10mm chamfer No chamfer Variation of chamfer on pole ends Angle can be adjusted too – 45° used up to now Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  10. pole profile hyperbolic region tangent region Tangent point variation QBD – tangent point 10mm tangent point 48mm inscribed radius Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  11. QBD Optimisation • Asymmetric clamp plate included • Best result: • tangent point 22mm • chamfer length 9mm • good IG region 17.8mm(0.1%) Parameter space Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

  12. Further Work • combined model: finalise currents • complete yoke shape optimisation – both magnets • work with TY checking magnet code results • interface with tracking codes:field map  tracking  change model  field map etc. • more detailed injection/extraction modelling • get prototypes ordered! Magnet Modelling - Ben Shepherd /documents/emma/rev/mtg2/shepherd-070227.ppt

More Related