# Difference: Meeting20070529MartinJurkovic (1 vs. 7)

Revision 7
14 Jun 2007 - Main.MartinJurkovic
Line: 1 to 1

 META TOPICPARENT name="HomepageMartinJurkovic"
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# Total scattering in RICH

Total scattering was calculated using the formula:

Theta_0 = 13.6MeV/(beta*c*p) * Z * sqrt(SUM) * {1 + 0.038 * ln(SUM)}
where SUM = sum(x_i / X0_i)
Taking into account electrons `=> beta =` Z == 1

# Small Angle Scattering devided in all RICH components

### Scattering in C4F10

Line: 110 to 121

• Theta correlation for positive leptons (signal left, conversion right): >
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• Total scattering angle as a function of polar angle and momenta: • Scattering angle as a function of momenta for different polar angles: META FILEATTACHMENT attr="" comment="Comparision delta theta (RICH - MDC) distribution of signal and conversion leptons" date="1180430486" name="compareSim.png" path="compareSim.png" size="23150" user="MartinJurkovic" version="1.1" attr="" comment="Phi correlation for positive leptons (signal left, conversion right)" date="1180430679" name="phiPos.jpg" path="phiPos.jpg" size="115438" user="MartinJurkovic" version="1.1" attr="" comment="Theta correlation for positive leptons (signal left, conversion right)" date="1180430761" name="thetaPos.jpg" path="thetaPos.jpg" size="121377" user="MartinJurkovic" version="1.1"
Line: 117 to 134

 META FILEATTACHMENT attr="" comment="3D scattering radiator" date="1181032027" name="scatteringRadiator.png" path="scatteringRadiator.png" size="26720" user="MartinJurkovic" version="1.1" attr="" comment="scattering radiator @ 50deg" date="1181033459" name="scatteringRadiator50.png" path="scatteringRadiator50.png" size="10186" user="MartinJurkovic" version="1.2" attr="" comment="Scatteing radiator for different Theta" date="1181032273" name="ScatteringRadiatorAll.png" path="ScatteringRadiatorAll.png" size="14802" user="MartinJurkovic" version="1.1"
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 META FILEATTACHMENT attr="" comment="Total scattering angle as a function of polar angle and momenta" date="1181640400" name="scatteringTotal.png" path="scatteringTotal.png" size="29356" user="MartinJurkovic" version="1.1" attr="" comment="Scattering angle as a function of momenta for different polar angles" date="1181640458" name="scatteringTotalSlice.png" path="scatteringTotalSlice.png" size="18128" user="MartinJurkovic" version="1.1"
Revision 4
06 Jun 2007 - Main.MartinJurkovic
Line: 1 to 1

 META TOPICPARENT name="HomepageMartinJurkovic"
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# Small Angle Scattering in RICH

• Properties of C4F10
• Density: 24.61kg/m**3 (at 20deg Celsius, 2.28bar, gas phase)
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# Small Angle Scattering in RICH

### Scattering in C4F10

• Properties of C4F10
• Density: 24.61kg/m**3 (at 20deg Celsius, 2.28bar, gas phase)

• Density: 1516kg/m**3 (at 20deg Celsius, liquid phase)
Changed:
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• Radiation Length X0 = 34.52g/cm**2 = 3200cm in the gas phase at atmospheric pressure
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• Radiation Length X0 = 34.52g/cm**2 = 3200cm in the gas phase at atmospheric pressure

Dependance of the length of the radiator on the emmision angle:
Line: 26 to 28
Momentum dependance of the small scattering angle for emmision angle Theta = 50deg: >
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### Scattering in the carbon shell

• Properites of CFK
• Mean thickness = 2.1mm
• Radiation length X0 = 30cm
Changed:
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Dependance of the small scattering angle on momentum:
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Dependance of the small scattering ang le on momentum: # Eliptic vs rectangular matching cut

Revision 2
05 Jun 2007 - Main.MartinJurkovic
Line: 1 to 1

 META TOPICPARENT name="HomepageMartinJurkovic"
>
>

# Small Angle Scattering in RICH

• Properties of C4F10
• Density: 24.61kg/m**3 (at 20deg Celsius, 2.28bar, gas phase)
• Density: 1516kg/m**3 (at 20deg Celsius, liquid phase)
• Radiation Length X0 = 34.52g/cm**2 = 3200cm in the gas phase at atmospheric pressure

Dependance of the length of the radiator on the emmision angle:

Small angle scattering as a function of momentum and emmision angle: Momentum dependance of the small scattering angle for different emmision angles: Momentum dependance of the small scattering angle for emmision angle Theta = 50deg: • Properites of CFK
• Mean thickness = 2.1mm
• Radiation length X0 = 30cm

Dependance of the small scattering angle on momentum: # Eliptic vs rectangular matching cut

Area difference between these two cuts is:
Line: 85 to 109

 META FILEATTACHMENT attr="" comment="Comparision delta theta (RICH - MDC) distribution of signal and conversion leptons" date="1180430486" name="compareSim.png" path="compareSim.png" size="23150" user="MartinJurkovic" version="1.1" attr="" comment="Phi correlation for positive leptons (signal left, conversion right)" date="1180430679" name="phiPos.jpg" path="phiPos.jpg" size="115438" user="MartinJurkovic" version="1.1" attr="" comment="Theta correlation for positive leptons (signal left, conversion right)" date="1180430761" name="thetaPos.jpg" path="thetaPos.jpg" size="121377" user="MartinJurkovic" version="1.1"