PDG ESTIMATES OF MATERIAL INTERACTIONS |
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by Carl Gagliardi |
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Temperature (K) = |
300 |
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Radiation |
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Total |
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Length |
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Total |
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Thickness/unit (mg/cm^2) |
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Min ionizing/unit (MeV) |
Min ionizing contrib (MeV) |
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X_0 (gm/cm^2) |
Thick/X_0 per unit |
Thick/X_0 |
ENTER: |
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Number of mylar foils = |
3 |
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0.825 |
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1.52E-03 |
4.57E-03 |
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39.95 |
2.065E-05 |
6.196E-05 |
cm of DME = |
0.8 |
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1.870 |
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3.87E-03 |
3.10E-03 |
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38.89 |
4.808E-05 |
3.846E-05 |
cm of He N2 = |
5 |
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0.192 |
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3.68E-04 |
1.84E-03 |
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74.63 |
2.571E-06 |
1.285E-05 |
cm of CF4 iso-C4H10 = |
0 |
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3.333 |
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5.88E-03 |
0.00E+00 |
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35.22 |
9.465E-05 |
0.000E+00 |
Mylar target foil (assume 125 um) |
0 |
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17.375 |
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3.21E-02 |
0.00E+00 |
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39.95 |
4.349E-04 |
0.000E+00 |
Graphite on target (assume 45 um, rho=2) |
0 |
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9.000 |
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1.57E-02 |
0.00E+00 |
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42.70 |
2.108E-04 |
0.000E+00 |
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Total: |
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9.51E-03 |
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1.13E-04 |
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Assumed typical |cos(th)| = |
0.75 |
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PDG Estimates: |
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theta^rms_plane coef = |
0.1 |
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Enter |cos(th)| = |
0.950 |
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(theta^rms_plane)^2 coef = |
0.01 |
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Energy loss (MeV) = |
1.00E-02 |
+ |
E * |
1.19E-04 |
<--valid for e+ or e- only! |
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RMS theta in plane = |
9.75E-02 |
/ |
(p*beta) |
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Enter p*beta = |
30.00 |
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He N2 calcs: |
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Energy loss = |
1.36E-02 |
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MeV |
<--valid for e+ or e- only! |
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He fraction = |
0.97 |
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RMS theta in plane = |
3.25E-03 |
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radians |
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Effective molecular weight = |
4.72 |
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Weight fraction He = |
0.822 |
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94.32 |
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Weight fraction N2 = |
0.178 |
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37.99 |
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1 / He N2 X_0 = |
0.01 |
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He N2 X_0 = |
74.63 |
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CF4 iso-C4H10 calcs: |
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CF4 fraction = |
0.8 |
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Effective molecular weight = |
82 |
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Weight fraction C in CF4 = |
0.117 |
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42.70 |
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Weight fraction F in CF4 = |
0.741 |
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32.93 |
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Weight fraction iso-C4H10 = |
0.141 |
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45.07 |
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1 / CF4 iso-C4H10 X_0 = |
0.03 |
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CF4 iso-C4H10 X_0 = |
35.22 |
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