MAD MARS Beam Line Builder MMBLB its

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MAD MARS Beam Line Builder (MMBLB) & its application for ILC BDS N. Nakao, N. Mokhov (Fermilab) M. Kostin (Michigan State Univ. ) What’s MMBLB p How to make MMBLB p Recent application Beam Delivery System (BDS) of International Linear Collider (ILC) p Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 1

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 Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 2

3 Ge. V proton synchrotron of J-PARC (JAEA & KEK Japan) Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 3

e- du MARS 15 Geometry for ILC BDS mp IP e+ beam line Muon spoiler hall 14 & 14 mrad 1. 6 km from IP ILC Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 4

How to make MMBLB Subroutines to define each component p Tunnel_geo – geometry Tunnel_mat – material Tunnel_vol – volume (Optional) Tunnel_zonename – name of zone (Optional) p 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 Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 5

How to make MMBLB p 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) p m 1507. f (subroutines to be modified) uncomment related sentence for these subroutines * * IF (IND(13)) THEN : ENDIF reg 1 – 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 Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 6

How to make MMBLB MAD optics file Bend Sum. L L k 0 [m] [rad] “Keyword” “Type” “Name” "DRIFT" "DL 10" "SBEND" "H 20" "DRIFT" "DL 10" "SBEND" "H 20“ "DRIFT" "DL 10" "DPCBPM" "BPC 1" "DPCBBO" Specific MAD keywords (15) are allowed Noriaki Nakao (nakao@fnal. gov) 0. 2. 4 E-4 0. Ignored Type defined in name_func 1. 0 4. 0 3. 0 20. 0 16. 0 23. 0 20. 5 16. 0 Q Sx Oc k 1 k 2 k 3 Tilt [rad] Bend angle Element length May. 24, 2007 MARS MMBLB 0. 0. 0. Roll angle Gradient factors magnetic field 7

How to make MMBLB Main “Keyword” in OPTICS “DRIFT” “SBEND” “RBEND” “QUADRUPOLE” “SEXTUPOLE” “OCTUPOLE” “ECOLLIMATOR” “RCOLLIMATOR” etc. Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 8

Variety beam lines with same components using different OPTICS Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 9

Subroutine Tunnel_geo * Local beam line coordinates x=xlocmad y=ylocmad z=zlocmad Tunnel follows beam line shape Noriaki Nakao (nakao@fnal. gov) * Global MARS coordinates x=xglmad y=yglmad z=zglmad Tunnel is independent of beam line shape May. 24, 2007 MARS MMBLB 10

MMBLB application on ILC BDS 1 mile (1. 6 km) beamline to IP point ILC 250 Ge. V-~10 MW e+ e- beam collision at IP MARS model e+ beam line 250 Ge. V ~10 k. W(0. 1% loss) at 3 collimators Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 11

e- du MARS 15 Geometry for ILC BDS SP 2 SP 4 mp IP SPEX e+ beam line Muon spoiler hall 14 & 14 mrad 1. 6 km from IP ILC Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 12

Tunnel structure described in Tunnel_geo e- beam line e+ beam line Muon spoiler hall Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB IP 13

5 m wall muon spoiler defined as “DRIFT” at Keyword in OPTICS Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 14

Donut muon spoilers defined as “DRIFT” at Keyword in OPTICS Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 15

Donut muon spoilers defined as “DRIFT” at Keyword in OPTICS Donut muon spoiler “QUADRUPOLE” “DRIFT” Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 16

OPTICS for ILC BDS MAD optics file -----------------------------------“Keyword” “Type” “Name” -----------------------------------"DRIFT" "DL 10" “-” --- beam pipe (drift tube) "DRIFT" “MUSP 1" “-” --- muon spoiler Newly inserted in MARS “QUADRUPOLE" “QL 10" “-” --- quad magnet "SBEND" "H 20" “-” --- dipole magnet “ECOLLIMATOR" "PC 1" “-” --- thin collimator (8 mm etc. ) “RCOLLIMATOR" "AB 1“ “-” --- thick collimator (10~40 cm) -----------------------------------Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 17

MARS input STRUCT simulation results (each event is read from subroutine BEG 1) e+ source profiles Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 18

Muon Flux 1 1/100 1/20 Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 19

Prompt Dose 1 mrem/h 0. 01 mrem/h 0. 1 mrem/h Noriaki Nakao (nakao@fnal. gov) May. 24, 2007 MARS MMBLB 20

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