HES-HKS & KaoS meeting 19/June/2012 Toshi Gogami

Contents ENGE+SPL TOSCA – New map debut !

SPL + ENGE ( TOSCA calculation )

Process Ever 1.ENGE+SPL 3D-CAD  SAT file 2.Create combined model directly New strategy – ENGE + SPL 3D-CAD  SAT file  1.SPL 2.SPL + tilt ….(1) 3.ENGE 4.ENGE + tilt …..(2) 5.Combine (1) and (2) Errors….

The way to SPL+ENGE mag. Field map 1.SPL Fill holes in CAD to avert volume mesh errors. B vs. current density scan instead of B-I curve.  Set the current density which can reproduce the measurements of magnetic flux density. 2.SPL + tilt ….(1) Read precise positions and angles in global coordinates from 3D-CAD file.  Input With no symmetry 3.ENGE Fill holes in CAD to avert volume mesh errors. B vs. current density scan instead of B-I curve.  Set the current density which can reproduce the measurements of magnetic flux density. 4.ENGE + tilt …..(2) Read precise positions and angles in global coordinates from 3D-CAD file.  Input With no symmetry 5.Combine (1) and (2) 1.Set coordinates system to the same as GEANT4 code 2.Solve  Map

SPL SPL holes  Chose [ A/cm 2 ] ( ~1.7 T )

SPL + tilt (with no symmetry)

ENGE

ENGE (current density scan) ( -50.0, -75.0, 0.0 )  Chose [A/cm 2 ] ( ~1.56 T )

SPL + ENGE model

Backgrounds One box background Could not meshed well anyhow…. Two boxes background

Same coordinate system as GEANT4 code Rotated to set them same as GEANT4 code

Incidence of an electron Okayasu Dr thesis Track Particle = electron p = 300 MeV φ = 1.67 rad θ = 87.2 mrad

The effects from the other magnet The effect on magnetic field from the other side of magnet. – 4 Points P1 = (40, 15, 100) P2 = (20, 10, 80 ) P3 = (10, 5, 70 ) P4 = ( 5, 3, 60 ) – 5 sets SPL + ENGE model – SPL (ON) + ENGE (ON).... Set1 – SPL (OFF) + ENGE (ON)....Set2 – SPL (ON) + ENGE(OFF)....Set3 ENGE model....Set4 SPL model....Set5 Want to see  Set1 vs. Set2+Set3 and Set1 vs. Set4+Set5 Comparison 2 Comparison 1

Set4 – Set2 (comparison 1)

Set5 – Set3 (comparison 2)

考察 The effects on the calculation of mag. field Depend on the shape and the configuration of magnets Less than a few % effects for each component Optical nature is intricately changed according to these plots which shows the effects for all components are different. To obtain magnetic fields which have practical nature of optics When one calculate a magnet, put another magnet on the setup. (relatively finer mesh) – Add up those magnetic field together later. (to see this is ok or not, need do check Set1 vs. Set4+Set5) Calculate magnetic field for those magnets at once. (relatively rough mesh)

Summary and To do Summary – ENGE+SPL TOSCA calculation New map is now available (combined version) To obtain magnetic fields which have practical nature of optics – When one calculate a magnet, put another magnet on the setup. (relatively finer mesh) – Calculate magnetic field for those magnets at once. (relatively rough mesh) To do – Output and implement new maps (E01-011) ENGE ONLY SPL ONLY ENGE + SPL – Matrix tuning mtune – Cross sections of Λ,Σ 0 and 12 Λ B g.s. Efficiencies (Trigger, Tracking, DAQ, K + selection, Burned effects, absorption, decay….)

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