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| | ==how it looks 1 (<math> \Theta_c/2</math>, box 3"x4" and then pipe 4")== | | ==how it looks 1 (<math> \Theta_c/2</math>, box 3"x4" and then pipe 4")== |
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| − | [[File:vacuum_pipe_collimator.png]]<br> | + | [[File:vacuum_pipe_collimator_.png]]<br> |
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| | ==how it looks 2 (<math> \Theta_c/4</math>, box 3"x4" and then pipe 4")== | | ==how it looks 2 (<math> \Theta_c/4</math>, box 3"x4" and then pipe 4")== |
Revision as of 05:54, 11 June 2010
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Critical angle
[math]\Theta_C = \frac{m_ec^2}{E_{beam}} = \frac{0.511\ MeV}{25\ MeV} = 1.17\ ^o[/math]
Kicker angle
[math]\Delta_1 = 286\ cm\ *\ \tan(1.17^o) = 5.84\ cm[/math]
[math]x^2+x^2 = 5.84^2\ cm \ \ \Rightarrow\ \ x = 4.13\ cm[/math]
[math]\Delta_2 = 4.13\ cm \ \ \Rightarrow\ \ \tan^{-1}\left(\frac{2.36}{286}\right) = 0.827\ ^o[/math]
Vacuum pipe location ([math] \Theta_c/2[/math])
collimator location
1) center position:
[math]286\ cm \cdot \tan (0.827) = 4.13\ cm[/math] (wall 1)
[math](286 + 183)\ cm \cdot \tan (0.827) = 6.77\ cm[/math] (wall 2)
2) collimator diameter:
[math]286\ cm \cdot \tan (1.17/2) = 2.92\ cm[/math] (wall 1)
[math](286 + 183)\ cm \cdot \tan (1.17/2) = 4.79\ cm[/math] (wall 2)
collimator critical angle
[math] AB = AC - BD/2 = (4.13 - 2.92/2)\ cm = 2.67\ cm [/math]
[math] A_1D_1 = A_1C_1 + B_1D_1/2 = (6.77 + 4.79/2)\ cm = 9.165\ cm [/math]
[math]\bigtriangleup BED_1 \Rightarrow \tan (\alpha) = \frac{(9.165 - 2.67)\ cm}{183\ cm} \Rightarrow \alpha = 2.033^o[/math]:
minimal distance from the wall
[math]\bigtriangleup FAB \Rightarrow FA = \frac{AB}{\tan (2.033^o)} = \frac{2.67\ cm}{\tan (2.033^o)} = 75\ cm [/math]
Vacuum pipe location ([math] \Theta_c/4[/math])
collimator location
1) center position:
[math]286\ cm \cdot \tan (0.47) = 2.35\ cm[/math] (wall 1)
[math](286 + 183)\ cm \cdot \tan (0.47) = 3.85\ cm[/math] (wall 2)
2) collimator diameter:
[math]\Theta_c/4 = 0.67^o/4 = 0.168^o[/math]
[math]286\ cm \cdot \tan (0.168) = 0.84\ cm[/math] (wall 1)
[math](286 + 183)\ cm \cdot \tan (0.168) = 1.38\ cm[/math] (wall 2)
collimator critical angle
[math] AB = AC - BD/2 = (2.35 - 0.84/2)\ cm = 1.93\ cm [/math]
[math] A_1D_1 = A_1C_1 + B_1D_1/2 = (3.85 + 1.38/2)\ cm = 4.54\ cm [/math]
[math] ED_1 = A_1D_1 - AB = (4.54 - 1.93)\ cm = 2.61\ cm [/math]
from triangle [math]BED_1[/math]:
[math] \tan (\alpha) = \frac{2.61\ cm}{183\ cm} \Rightarrow \alpha = 0.82^o[/math]
minimal distance from the wall
from triangle FAB:
[math] FA = \frac{AB}{\tan (0.82^o)} = \frac{1.93\ cm}{\tan (0.82^o)} = 135\ cm [/math]
Funny pictures...
how it looks 1 ([math] \Theta_c/2[/math], box 3"x4" and then pipe 4")
File:Vacuum pipe collimator .png
how it looks 2 ([math] \Theta_c/4[/math], box 3"x4" and then pipe 4")
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