"Static" steering correction on the DB Quadrupoles
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"Static" steering correction on the DB Quadrupoles Alexey Vorozhtsov 14 Dec 2010
description
"Static" steering correction on the DB Quadrupoles. Alexey Vorozhtsov 14 Dec 2010. DB QUAD parameters. Steerer for DBQ. Quadrupole coil. Steerer coil. Opera 2D 180deg model Quadrupole only , IW=4900[A], -for nominal ∫ Gdz =12.18[T]. - PowerPoint PPT Presentation
Transcript of "Static" steering correction on the DB Quadrupoles
"Static" steering correction on the DB Quadrupoles
Alexey Vorozhtsov14 Dec 2010
Alexey Vorozhtsov 2
DB QUAD parameters CLIC DB Quadrupole Parameters Units
MAGNET Magnet size H×S×L [mm×mm×mm] 390×390×286Magnet mass [kg] 149.2Full aperture [mm] 26
Good field region(GFR) diameter [mm] 11×2=22
YOKEYoke size H×S×L [mm×mm×mm] 390×390×180Yoke mass [kg] 29.4×4=117.6
COIL
Hollow Conductor size [mm] 6×6, Ø=3.5
Number of turns per coil 52
Total conductor mass [kg] 31.6
Operation mode10% of nominal Nominal 120% of nominal
Effective length [mm] 194.7 194 192.5Gradient at Z=0 [T/m] 6.26 62.78 75.85
Integrated gradient ∫Gdl [T] 1.218 12.18 14.6
Integrated gradient quality in GFR % 0.04 0.01 0.02
Electrical parameters
Ampere turns per pole [A] 432 4840 9100
Current [A] 8.3 93 175Current density [A/mm2] 0.3 3.6 6.8Total resistance [mOhm] 99 99 99Total inductance [mH] 40 40 40Voltage [V] 0.82 9.2 17.3Power [kW] 0.007 0.86 3.03
COOLINGAir (natural convection) Water Water
Cooling circuits per magnet 4 4
coolant velocity [m/s] 1.1 1.9
cooling flow per circuit [l/min] 0.6 1.1
Pressure drop [bar] 2.2 5.7Reynolds number 4122 8210Temperature rise [K] 5 10
IWLC10, WG6, 10/20/2010
Steerer for DBQParameters for CLIC DB Steerer
Parameter UnitIntegrated field ∫Bdz 12 [mTm]Magnetic length 195 [mm]Field at center B(0) 0.062 [T]Ampere-turns per pole 600 [A]Number of turns per coil 6Current 100 [A]
Steerer coil
Quadrupole 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]
11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 110.04
0.05
0.06
0.07
0.08
0.09
0.1
0.11
Corrector ONLY 600[A]
Corrector field in the Horizontal plane
X [mm]
By[
T]
• 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 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…
11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 110.04
0.05
0.06
0.07
0.08
0.09
0.1
0.11
Corrector ONLY 600[A]Corrector field 600[A] with QUAD on 4900[A]
Corrector field in the Horizontal plane
X [mm]
By[
T]
Non symmetrical field distribution(Iron saturation)
Non symmetrical field distribution(Iron saturation)
Opera 2D 180deg model Quadrupole +Corrector, IwCorr=60[A], IwQuad=430[A] (10% of nominal)
11 10 9 8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 9 10 114 10
3
5 103
6 103
7 103
8 103
9 103
0.01
0.011
Corrector ONLY 60[A]Corrector field 60[A] with QUAD on 430[A]
Corrector field in the Horizontal plane
X [mm]
By[
T]
