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Statistical Check of FIDEL Transfer Function 2008-2012 Analysis by Per Hagen

Detailed analysis by Per Hagen on the statistical discrepancies found in the transfer function data of FIDEL from 2008 to present. The study examines the significant mismatches in MQY magnets data and proposes corrections for better accuracy.

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Statistical Check of FIDEL Transfer Function 2008-2012 Analysis by Per Hagen

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  1. Statistical check of FIDEL Transfer Function2008 (start) – 2012 (present) Per Hagen (TE/MSC) FiDeL Team03.07.2012

  2. Background • Stephane F. remarked that the spread of the transfer function in FIDEL is large for MQY magnets • I checked the spread in the MQY measurement data against FIDEL and found significant mismatch • The MQY were all measured at “warm” but not all have “cold” data • Since the MQY has higher than nominal permeability in the collars (like MQ), I computed my own permeability corrections and “warm-to-cold offset”. • When I compared my own data with FIDEL I found several MQY circuits with strange mismatch • I gave the errors to Rogelio in ABP for further cross-check • I checked the spread in the other magnet families (measurements and FIDEL data) and found good agreements

  3. Statistics for TF geo-gamma dipoles(correctors not included)

  4. Statistics for TF geo-gamma quads(correctors not included)

  5. More MQY statistics (these magnets had high mu in some collars)

  6. Details for MQY circuits • (comparison FIDEL versus SM18 DB and Per’s mu and warm-to-cold offset)

  7. Presumed errors in FIDEL MQY TF • (Per’s private TF data set compared to FIDEL) Why are there only large negative errors?

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