Difference between revisions of "Geometry (25 MeV LINAC exit port)"

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=Critical angle=
+
=general setup=
  
<math>\Theta_C = \frac{m_ec^2}{E_{beam}} = \frac{0.511\ MeV}{25\ MeV} = 1.17\ ^o</math><br>
+
[[File:minimum_energy_condition.png]]
  
=Kicker angle and displacements on the wall=
+
=geometry calculation=
 
 
==accelerator's side wall==
 
 
 
  <math>\Delta_1 = 286\ cm\ *\ \tan(1.17^o) = 5.84\ cm</math> <br>
 
  <math>x^2+x^2 = 5.84^2\ cm \ \ \Rightarrow\ \  x = 4.13\ cm</math> <br>
 
  <math>\Delta_2 = 4.13\ cm \ \ \Rightarrow\ \ \tan^{-1}\left(\frac{2.36}{286}\right) = 0.827\ ^o</math>
 
 
 
==detector's side wall==
 
 
 
  <math>\Delta_1 = (286\ cm + 183\ cm)\ *\ \tan(1.17^o) = 9.58\ cm</math>
 
  <math>\Delta_2 = (286\ cm + 183\ cm)\ *\ \tan(0.827^o) = 6.77\ cm</math>
 
 
 
=Vacuum pipe location (<math> \Theta_c/2</math>)=
 
 
 
==collimator location==
 
 
 
1) center position:
 
 
 
  <math>286\ cm \cdot \tan (0.47) = 2.35\ cm</math>  (wall 1)<br>
 
  <math>(286 + 183)\ cm \cdot \tan (0.47) = 3.85\ cm</math>  (wall 2)
 
 
 
2) collimator diameter:
 
 
 
  <math>\Theta_c/2 = 0.67^o/2 = 0.335^o</math>
 
 
 
  <math>286\ cm \cdot \tan (0.335) = 1.67\ cm</math>  (wall 1)<br>
 
  <math>(286 + 183)\ cm \cdot \tan (0.335) = 2.74\ cm</math>  (wall 2)
 
 
 
==collimator critical angle==
 
 
 
  <math> AB = AC - BD/2 = (2.35 - 1.67/2)\ cm = 1.52\ cm </math><br>
 
  <math> A_1D_1 = A_1C_1 + B_1D_1/2 = (3.85 + 2.74/2)\ cm = 5.22\ cm </math><br>
 
  <math> ED_1 = A_1D_1 - A_1E = (5.22 - 1.52)\ cm = 3.70\ cm </math>
 
 
 
from triangle <math>BED_1</math>:
 
 
 
  <math> \tan (\alpha) = \frac{3.70\ cm}{183\ cm} \Rightarrow \alpha = 1.16^o</math>
 
 
 
==minimal distance from the wall==
 
 
 
from triangle FAB:
 
 
 
  <math> FA = \frac{AB}{\tan (1.16^o)} = \frac{1.52\ cm}{\tan (1.16^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)<br>
 
  <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)<br>
 
  <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><br>
 
  <math> A_1D_1 = A_1C_1 + B_1D_1/2 = (3.85 + 1.38/2)\ cm = 4.54\ cm </math><br>
 
  <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 (<math> \Theta_c/2</math>, pipe 3")==
 
 
 
[[File:vacuum_pipe_collimator_0.335_2.png]]<br>
 
 
 
==how it looks 1 (<math> \Theta_c/4</math>, pipe 3")==
 
 
 
[[File:vacuum_pipe_collimator_0.168_2.png]]<br>
 
 
 
==how it looks 2 (<math> \Theta_c/4</math>, pipe 3")==
 
 
 
[[File:vacuum_pipe_collimator_168_1.png]]<br>
 
 
 
==how it looks 4 (<math> \Theta_c/2</math>, pipe (2 1/2)" and then pipe 4")==
 
 
 
need to adjust to converter position
 
 
 
[[File:vacuum_pipe_collimator_335_4.png]]<br>
 
 
 
 
 
==how it looks 5 (<math> \Theta_c/2</math>, box 3"x4" and then pipe 4")==
 
 
 
need to adjust to converter position
 
 
 
[[File:vacuum_pipe_collimator_335_5.png]]<br>
 
  
 +
{| border="1" cellpadding="20" cellspacing="0"
 +
|-
 +
!width=40|beam energy
 +
!width=40|collimator diameter
 +
|<math>\Theta_{critical}</math>
 +
|<math>\Theta_{kicker}</math>
 +
|<math>\alpha_{collimator}</math>
 +
|<math>AC</math>
 +
|<math>A_1C_1</math>
 +
|<math>BD</math>
 +
|<math>B_1D_1</math>
 +
|<math>FA</math>
 +
|<math>GH</math>
 +
|-
 +
|25 MeV||<math>\frac{\Theta_{critical}}{2}</math>||<math>1.17^o</math>||<math>0.83^o</math>||<math>2.03^o</math>
 +
|4.13 cm||6.78 cm||2.92 cm||4.79 cm||75 cm||7.49 cm
 +
|-
 +
|25 MeV||<math>\frac{\Theta_{critical}}{3}</math>||<math>1.17^o</math>||<math>0.83^o</math>||<math>1.63^o</math>
 +
|4.13 cm||6.78 cm||1.95 cm||3.20 cm||111 cm||4.99 cm
 +
|-
 +
|25 MeV||<math>\frac{\Theta_{critical}}{4}</math>||<math>1.17^o</math>||<math>0.83^o</math>||<math>1.43^o</math>
 +
|4.13 cm||6.78 cm||1.46 cm||2.40 cm||136 cm||3.74 cm
 +
|-
 +
|}
  
  
 
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Latest revision as of 17:50, 20 June 2010

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general setup

Minimum energy condition.png

geometry calculation

beam energy collimator diameter [math]\Theta_{critical}[/math] [math]\Theta_{kicker}[/math] [math]\alpha_{collimator}[/math] [math]AC[/math] [math]A_1C_1[/math] [math]BD[/math] [math]B_1D_1[/math] [math]FA[/math] [math]GH[/math]
25 MeV [math]\frac{\Theta_{critical}}{2}[/math] [math]1.17^o[/math] [math]0.83^o[/math] [math]2.03^o[/math] 4.13 cm 6.78 cm 2.92 cm 4.79 cm 75 cm 7.49 cm
25 MeV [math]\frac{\Theta_{critical}}{3}[/math] [math]1.17^o[/math] [math]0.83^o[/math] [math]1.63^o[/math] 4.13 cm 6.78 cm 1.95 cm 3.20 cm 111 cm 4.99 cm
25 MeV [math]\frac{\Theta_{critical}}{4}[/math] [math]1.17^o[/math] [math]0.83^o[/math] [math]1.43^o[/math] 4.13 cm 6.78 cm 1.46 cm 2.40 cm 136 cm 3.74 cm


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