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Changes in FIDEL LHC models in 2010

Changes in FIDEL LHC models in 2010. P. Hagen February 2010. Summary of changes for 2010. Phys. Rev. ST Accel . Beams 12 102401 (27.10.2009). MQWB saga continues. These curves are BL(I) and not TF(I) ! First curve shows 0 to 200 A ( I_GEO ) The next curve shows 0 to 6 A.

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Changes in FIDEL LHC models in 2010

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  1. Changes in FIDEL LHC models in 2010 P. Hagen February 2010

  2. Summary of changes for 2010

  3. Phys. Rev. ST Accel. Beams 12 102401 (27.10.2009)

  4. MQWB saga continues These curves are BL(I) and not TF(I) !First curve shows 0 to 200 A ( I_GEO ) The next curve shows0 to 6 A The fit curve becomesquickly unphysical belowlowest meas point at 1Awhere RESMAG = 16 000 units of TFgeo Therefore I have in 2010modified IRNG_LOW=1 Afor the 2 circuitsoperating in this range,and IRNG_LOW=10 Aotherwise + fine tuningof RESMAG curves

  5. New MBXW S/T measurements show some difference wrt HALL integrals 3 similar magnet families with essentially only different field direction (H/V) and magnetic length: MBXWS lm=0.82, MBXWT lm=1.57, MBXWH lm=3.43 where lm taken from average of measurements.

  6. Measurements of MBXWS 3 with SSW Proposed change • The spread in HALL measurements is often small • and when not small it looks more like 1 of 3 outlier • So why not use the SSW to represent all 3 magnets !

  7. Measurements of MBXWT 2 with SSW Proposed change • Assume spread is due to measurement issues • Use the SSW to represent all 3 magnets ! • The saturation is underestimated in the FIDEL curve

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