SIS-300. Beam pipe geometry created with create_bpipe_geometry_v14o.C pipe_v14o = pipe_v14i + fixed sizes of vacuum chamber for mvd_v14a The beam pipe is composed of aluminium (excluding STS section (220-1700mm) made of beryllium with constant thickness 0.5mm) with a thickness proportional to the diameter (D(z)mm/60). It is placed directly into the cave as mother volume. The beam pipe consists of few sections (including RICH/MUCH section). Each section has a PCON shape (including windows). There are two windows: first one @ 220mm with R600mm and 0.7mm thickness, second one of iron @ 8800mm with R600mm and 0.2mm thickness. The STS section is composed of cylinder D(z=220-500mm)=22mm and cone (z=500- 1700mm). The STS (conical part) and RICH sections have half opening angle 1.6deg as a result of optimization. For downstream detectors the half opening angle of sections is left the same (2.5deg) as in SIS-100 and section have cylindrical shape at z=6000-8800mm - it must be regarded as an intermediate iteration, expecting feedback from subdetectors' groups. The PSD section of the beam pipe is missing because it is planned that it will be part of PSD geometry. Material: aluminium Thickness: D(z)mm/60 Beam pipe section: pipe1 - vacuum chamber i Z,mm Rin,mm Rout,mm h,mm 1 -50.00 25.00 25.70 0.70 2 -5.00 25.00 25.70 0.70 3 -5.00 400.00 400.70 0.70 4 230.17 400.00 400.70 0.70 5 230.17 110.00 400.70 290.70 6 230.87 110.00 130.70 20.70 Beam pipe section: pipe2 - first window @ 220mm, h=0.5mm, R=600mm, material: beryllium i Z,mm Rin,mm Rout,mm h,mm 1 220.00 11.00 11.00 0.00 2 220.50 11.00 23.66 12.66 3 221.25 30.00 36.66 6.66 4 223.51 60.00 63.97 3.97 5 227.29 90.00 92.96 2.96 6 230.17 107.04 110.00 2.96 7 230.67 110.00 110.00 0.00 Beam pipe section: pipe3 - STS section, material: beryllium i Z,mm Rin,mm Rout,mm h,mm 1 220.00 10.50 11.00 0.50 2 530.00 10.50 11.00 0.50 3 1250.00 34.40 34.90 0.50 4 1700.00 47.00 47.50 0.50 Beam pipe section: pipe4 - RICH section i Z,mm Rin,mm Rout,mm h,mm 1 1700.00 45.92 47.50 1.58 2 1800.00 45.92 47.50 1.58 3 3700.00 99.91 103.35 3.44 Beam pipe section: pipe5 - TRD & TOF section i Z,mm Rin,mm Rout,mm h,mm 1 3700.00 99.90 161.60 61.70 2 3702.00 99.90 161.60 61.70 3 3702.00 156.20 161.60 5.40 4 6000.00 253.27 262.00 8.73 5 8800.00 253.27 262.00 8.73 Beam pipe section: pipe6 - second window @ 6000mm, h=0.2mm, R=600mm, material: iron i Z,mm Rin,mm Rout,mm h,mm 1 8743.24 0.00 0.00 0.00 2 8743.44 0.00 3.42 3.42 3 8747.34 66.58 70.00 3.42 4 8759.80 138.88 140.00 1.12 5 8781.19 209.35 210.00 0.65 6 8799.80 252.28 253.27 0.99 7 8800.00 253.27 253.27 0.00