SAD: Synchrotron Radiation SAD: Synchrotron radiation check Photon energy cut 1eV for round-off error Photon.sad: SADScript to calculate SR photon distribution after SAD traking IP 4 Gy (m) 0 0 Gx (m) 1500 SAD: Synchrotron Radiation 3x10-3 Beta & Energy Collimation Final Focus IP Gz (m) x -3x10-3 -4 Gy -4.337473 (m) 0 SAD: Synchrotron Radiation sx=0.727mm sy=0.186mm 4x10-4 Last bend (6.08mm) Gz (m) 0 IP x x -4x10-4 0 Gy-4.337473 (m) 0.02 SAD: Synchrotron Radiation sx=0.727mm sx=0.326mm sy=0.186mm sy=0.124mm S=0 qx=0.112mrad qx=0.117mrad qy=27.3mm qy=18.0mm sx=0.740mm sx=0.727mm sy=0.231mm sy=0.156mm S=3.51m SAD: Synchrotron Radiation s=0 Muon backgrounds MUCARLO (Namito version) 4 Muon attenuators 37mx2,45m,70m (option 15m,20m) Electron beam: 250GeV Muon generation point: Spoiler,Absorber Drift space IP 20m 25m 37m 37m 48m 77m JLC Design BDS Magnetic field of muon attenuators Raduis and sands of muon attenuators 10 7 inner 11cm & outer 31cm + sands inner 18cm & outer 78cm + sands All sands 6 10 5 10 4 e/mu 10 400 600 800 1000 1200 Distance from IP (m) 1400 1600 Inside and outside field of muon attenuators 7 10 10kG mu+ inside & large radius 10kG mu- inside & large radius 10kG mu+ & sands 6 e/mu 10 5 10 4 10 400 600 800 1000 1200 Distance from IP (m) 1400 1600 Short muon attenuators e/mu 10 9 10 8 10 7 10 6 10 5 10kG large radius & sands 10kG large radius & sands & 2 short attnuators 400 600 800 1000 1200 Distance from IP (m) 1400 1600
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