Static Steering Correction in DB Quadrupoles: Analysis and Parameter Models
This document by Alexey Vorozhtsov, dated December 14, 2010, explores the static steering correction mechanisms in the DB quadrupoles. It details the parameters of the steerer for the DBQ quadrupole coil, focusing on Opera 2D modeling with specifications of current and field properties. Significant points include measured field errors, effects of iron saturation, non-symmetrical field distributions, and a full spectrum of forbidden harmonics. Key operational values are provided for quadrupole and corrector configurations, illustrating the relationship between magnetic field performance and steering adjustments.
Static Steering Correction in DB Quadrupoles: Analysis and Parameter Models
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Presentation Transcript
"Static" steering correction on the DB Quadrupoles Alexey Vorozhtsov 14 Dec 2010
DB QUAD parameters Alexey Vorozhtsov
Steerer for DBQ Quadrupole coil Steerer coil
Opera 2D 180deg modelQuadrupole only, IW=4900[A], -for nominal ∫Gdz=12.18[T]
Opera 2D 180deg modelCorrector only, IW=600[A], B1=0.062[T], ∫Bdz=12[mTm] • Field error =50% at GFR=11[mm] • Sextupole component B3 w.r.t. B1(main): B3/B1=50%
Opera 2D 180deg modelQuadrupole +Corrector, IwCorr=600[A], IwQuad=4900[A] Non symmetrical field distribution(Iron saturation) Non symmetrical field distribution(Iron saturation) • Non symmetrical field distribution due to the iron saturation. • Dipole field decreased from 0.062T to 0.045[T] (Iron saturation) • Full spectrum of “forbidden” harmonics in quadrupole : B3,B5…
Opera 2D 180deg model Quadrupole +Corrector, IwCorr=60[A], IwQuad=430[A] (10% of nominal)
