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MAD MARS Beam Line Builder (MMBLB) & its application for ILC BDS. What ’ s MMBLB How to make MMBLB Recent application Beam Delivery System (BDS) of International Linear Collider (ILC). N. Nakao, N. Mokhov (Fermilab) M. Kostin (Michigan State Univ.).
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MAD MARS Beam Line Builder (MMBLB) & its application for ILC BDS • What’s MMBLB • How to make MMBLB • Recent application Beam Delivery System (BDS) of International Linear Collider (ILC) N. Nakao, N. Mokhov (Fermilab) M. Kostin (Michigan State Univ.) May.24, 2007 MARS MMBLB
What’s MMBLB Local coordinate (Definition of each component) 1.Tunnel 2.Beamline component beam pipe, dipole, quadrupole, collimator etc. Global coordinate (Put components on tunnel) Location, number, length, bending, magnetic field intensity of components are defined and changed by MAD “OPTICS” file May.24, 2007 MARS MMBLB
3 GeV proton synchrotron of J-PARC (JAEA & KEK Japan) May.24, 2007 MARS MMBLB
MARS15 Geometry for ILC BDS e- dump IP e+ beam line Muonspoilerhall 14 & 14 mrad 1.6km from IP ILC May.24, 2007 MARS MMBLB
How to make MMBLB Subroutines to define each component • Tunnel Tunnel_geo – geometry Tunnel_mat – material Tunnel_vol – volume (Optional) Tunnel_zonename – name of zone (Optional) • Beam line component (example: quad) quad_name_func – assign “Type” and “Name” in MAD OPTICS quad_init_func – initialization quad_geo_func – geometry quad_mat_func – material quad_field_func – magnetic field quad_vol_func – volume of zones quad_zonename_func – zone name May.24, 2007 MARS MMBLB
How to make MMBLB • MARS.INP Declaration of MMBLB INDX 13=T Define Vacuum in mother volume ZSEC 5000. 2501=0 (when 2=T) RSEC 1000. 101=0 (when 2=F) • m1507.f (subroutines to be modified) uncomment related sentence for these subroutines * IF (IND(13)) THEN : * ENDIF reg1 – define M_MAX PARAMETER (M_MAX= beamline_nof_zones + tunnel_nof_zones) field blinit – define initial condition blgeoinit – registration of all subroutines of beamline components May.24, 2007 MARS MMBLB
How to make MMBLB MAD optics file Bend Q Sx Oc “Keyword”“Type”“Name” SumL L k0 k1 k2 k3 Tilt [m] [m] [rad] [rad] "DRIFT" "DL10" "DPCBPM" 1.0 1.0 0. 0. 0. 0. 0. "SBEND" "H20" "BPC1" 4.0 3.0 2.4E-4 0. 0. 0. 0. "DRIFT" "DL10" "DPCBBO" 20.0 16.0 0. 0. 0. 0. 0. "SBEND" "H20“ "BPC1" 23.0 3.0 2.4E-4 0. 0. 0. 0. "DRIFT" "DL10" "DPCBBO" 20.5 16.0 0. 0. 0. 0. 0. Ignored Rollangle Specific MADkeywords (15) are allowed Bend angle Elementlength Gradient factors magnetic field Typedefinedin name_func May.24, 2007 MARS MMBLB
How to make MMBLB Main“Keyword”in OPTICS “DRIFT” “SBEND” “RBEND” “QUADRUPOLE” “SEXTUPOLE” “OCTUPOLE” “ECOLLIMATOR” “RCOLLIMATOR” etc. May.24, 2007 MARS MMBLB
Variety beam lines with same components using different OPTICS May.24, 2007 MARS MMBLB
Subroutine Tunnel_geo * Local beam line coordinates x=xlocmad y=ylocmad z=zlocmad * Global MARS coordinates x=xglmad y=yglmad z=zglmad Tunnel follows beam line shape Tunnel is independent of beam line shape May.24, 2007 MARS MMBLB
MMBLB application on ILC BDS 1 mile (1.6km) beamline to IP point ILC 250 GeV-~10MW e+ e- beam collision at IP MARS model e+ beam line 250 GeV ~10kW(0.1% loss) at 3 collimators May.24, 2007 MARS MMBLB
MARS15 Geometry for ILC BDS e- dump IP SP2 SP4 SPEX e+ beam line Muonspoilerhall 14 & 14 mrad 1.6km from IP ILC May.24, 2007 MARS MMBLB
Tunnel structure described in Tunnel_geo e- beam line e+ beam line IP Muonspoilerhall May.24, 2007 MARS MMBLB
5m wall muon spoilerdefined as “DRIFT” at Keyword in OPTICS May.24, 2007 MARS MMBLB
Donut muon spoilersdefined as “DRIFT” at Keyword in OPTICS May.24, 2007 MARS MMBLB
Donut muon spoilersdefined as “DRIFT” at Keyword in OPTICS Donut muon spoiler “QUADRUPOLE” “DRIFT” May.24, 2007 MARS MMBLB
OPTICS for ILC BDS MAD optics file ---------------------------------------------------------------------- “Keyword”“Type”“Name” ---------------------------------------------------------------------- "DRIFT" "DL10" “-” --- beam pipe (drift tube) "DRIFT" “MUSP1" “-” --- muon spoiler “QUADRUPOLE" “QL10" “-” --- quad magnet "SBEND" "H20" “-” --- dipole magnet “ECOLLIMATOR" "PC1" “-” --- thin collimator (8mm etc.) “RCOLLIMATOR" "AB1““-” --- thick collimator (10~40cm) ---------------------------------------------------------------------- Newly inserted in MARS May.24, 2007 MARS MMBLB
STRUCT simulation results MARS input (each event is read from subroutine BEG1) e+ source profiles May.24, 2007 MARS MMBLB
Muon Flux 1 1/100 1/20 May.24, 2007 MARS MMBLB
Prompt Dose 1 mrem/h 0.01 mrem/h 0.1 mrem/h May.24, 2007 MARS MMBLB