PEN 2008 Beam Counter Response: GEANT+Data ------------------------------------------ Beam Counter thicknesses: B0= 3mm + 0.2mm wrapper Mylar Windows= 0.3mm DEG BC-408= 13mm + 1.0mm wrapper TGT BC-408= 15mm +0.3mm wrapper Measured pi+ stop point: z0=+4.99mm TGT front face=-1.75mm pi+ range in TGT: 6.7mm Using the thicknesses above we get GEANT3 deposited energies/measured E_ee: 77MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.93MeV 1.26 DEG 13.86MeV 6.97 TGT 3.79MeV 12.29 zTGT -6.80 mm out out 78MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.88MeV 1.26 DEG 13.03MeV 6.81 TGT 5.43MeV 11.36 zTGT -5.80 mm out out 79MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.89MeV 1.26 DEG 12.11MeV 6.72 TGT 6.62MeV 10.31 zTGT -4.90 mm out out 80MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.79MeV 1.26 DEG 11.57MeV 6.60 TGT 7.79MeV 9.65 zTGT -4.00mm out out 81MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.77MeV DEG 11.28MeV TGT 8.72MeV zTGT -3.40mm out out 82MeV/c Nominal Momentum (Range 5.2mm) pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.80MeV DEG 10.69MeV TGT 9.73MeV zTGT -2.30mm out out 83MeV/c Nominal Momentum (Range 6.0mm) pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.78MeV DEG 10.28MeV TGT 10.73MeV zTGT -1.5mm out out 83.7MeV/c Nominal Momentum (Range 6.8mm) <-- This is the best momentum based on 6.7mm range pi+DE mu+DE beam-e+DE runs 83500-84100, dialed-in 85MeV/c momentum (G3) (G3) (G3) ------------------------------------------- B0 1.72MeV 1.15 0.51 DEG 10.07MeV 6.10 2.52 TGT 11.44MeV 8.44 2.62 zTGT -0.70mm out out ------------------------------------------- 84MeV/c Nominal Momentum (Range 7.0mm) pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.72MeV DEG 9.94MeV TGT 11.68MeV zTGT -0.50mm out out //////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////// PEN 2009 Beam Counter Response: GEANT+Data ------------------------------------------ Beam Counter thicknesses: B0= 3mm + 0.2mm wrapper Mylar Windows= 0.3mm DEG BC-408= 5mm + 0.3mm wrapper at -98.4mm mTPC wires at -81 -71 -61 -51mm TGT BC-408= 15mm +0.3mm wrapper at -14-to-16mm, z0=+0.95, range 15mm Measured pi+ stop point: z0=+1.00mm TGT front face=-7.5mm pi+ range in TGT: mm (run , dialed-in 70 MeV/c) pi+ range in TGT: 8.5mm (run 90000, dialed-in 72 MeV/c) pi+ range in TGT: 10.6mm (run 91200, dialed-in 74 MeV/c) Using the geometry above we get GEANT3 deposited energies/measured E_ee: 70MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.23MeV DEG 5.81MeV TGT 8.28MeV zTGT -3.70mm out out 71MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.20MeV DEG 5.60MeV TGT 8.98MeV zTGT -3.10mm out out 72MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.20MeV DEG 5.33MeV TGT 9.90MeV zTGT -2.30mm out out 73MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.18MeV DEG 5.10MeV TGT 10.69MeV zTGT -1.50mm out out 74MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.04MeV DEG 5.04MeV TGT 11.28MeV zTGT -1.00mm out out 75MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.02MeV DEG 4.85MeV TGT 11.82MeV zTGT -0.10 mm out out 76MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 2.01MeV 1.33 DEG 4.64MeV 2.98 TGT 12.65MeV 9.01 zTGT 0.60mm out out 76.6MeV/c Nominal Momentum DATA (run 90000, nominal 72MeV/c!) pi+DE mu+DE beam-e+DE pi+ wavef beam mu+ wavef beam e+ wf decay mu+ decay e+ (G3) (G3) (G3) integral integral integral integral integral ------------------------------------------- ----------------------------------------------------------- B0 1.97MeV 1.34 0.51 DEG 4.60MeV 2.92 1.04 TGT 12.82MeV 8.90 2.65 603E3 450E3 144E3 159E3 50:250E3 zTGT 1.00mm out out (=11.12MeVee) (=8.28) (=2.65) (=2.93) (0.9-4.6) Q=0.87 Q=0.93 Q=1 Q=0.71 Q=1 77MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.88MeV 1.29 DEG 4.54MeV 2.84 TGT 13.23MeV 8.74 zTGT 1.20mm out out 78MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.88MeV DEG 4.39MeV TGT 13.62MeV zTGT 2.10mm out out 79.3MeV/c Nominal Momentum DATA (run 91200, nominal 74MeV/c!) pi+DE mu+DE beam-e+DE pi+ wavef beam mu+ wavef beam e+ wf decay mu+ decay e+ (G3) (G3) (G3) integral integral integral integral integral ------------------------------------------- ----------------------------------------------------------- B0 1.88MeV 1.26 0.51 DEG 4.24MeV 2.67 1.04 TGT 14.60MeV 8.05 2.65 655E3 460E3 141E3 149E3 zTGT 3.1mm out out (=12.31MeVee) (=8.64) (=2.65) (=2.80) Q=0.84 Q=1.07 Q=1 Q=0.68 Time-of-Flight: B0-TGT Distance: 3.612 mm For 72MeV/c nominal tune, measured t(beam e+) - t(beam pi+)=12.22ns (e+ in front of pi+) Expected: t(beam e+) - t(beam pi+)=14.22 ns Expected: t(beam mu+) - t(beam pi+)=4.88 ns (mu+ in front of pi+) //////////////////////////////////////////////////////////// PEN 2010 Beam Counter Response: GEANT+Data ------------------------------------------- Beam Counter thicknesses: B0= 3mm + 0.2mm wrapper Mylar Windows= 0.3mm DEG BC-408= 9mm + 0.3mm wrapper at 0.00mm mTPC wires at -00 -00 -00 -00mm TGT BC-408= 9mm +0.3mm wrapper at -15-to-15mm 80.3MeV/c Nominal Momentum pi+DE mu+DE beam-e+DE (G3) (G3) (G3) ------------------------------------------- B0 1.87MeV 1.22 0.51 DEG 7.41MeV 4.58 1.77 TGT 12.18MeV 8.69 2.65 zTGT 0.00mm out out