|
Size: 1141
Comment:
|
Size: 1692
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 15: | Line 15: |
| Note that the arm cavity g-factor is assumed to be negative (1.5km-1.9km), which usually gives slightly smaller beam sizes on the PRM. |
|
| Line 19: | Line 21: |
=== Layout files === The optical layout files corresponding to the above cases. [[https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/OptLayout/Layout/bLCGT_OptLayout.dxf|Case 1]] [[https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/OptLayout/Layout/bLCGT_OptLayout_add2m.dxf|Case 2]] [[https://granite.phys.s.u-tokyo.ac.jp/svn/LCGT/trunk/mif/OptLayout/Layout/bLCGT_OptLayout_add3m.dxf|Case 3]] |
Layout related issues
Location of PR2 tank
Is it possible to put the PR2 and SR2 vacuum chambers further away from the BS chamber ? The minimum separation is 2.7m (center-to-center). However, in order to improve the workability around the BS chamber, we want increase the separation.
Comparison Table
L_BS_PR2 is the separation between the center of BS chamber and the center of PR2 chamber. The following table shows the the Folding parameters with three different cases of L_BS_PR2. Case 1 is the default plan. Case 2 adds 2m to the BS-PR2 separation, and Case 3 adds 3m.
Note that the arm cavity g-factor is assumed to be negative (1.5km-1.9km), which usually gives slightly smaller beam sizes on the PRM.
|
L_BS_PR2 |
Folding Angle |
Lp1 |
Lp2 |
Lp3 |
PRM ROC |
PRM Beam Size |
PR2 ROC |
PR2 Beam Size |
PR3 ROC |
PR3 Beam Size |
Case 1 |
2.7m |
0.63deg |
14.76m |
12.07m |
14.76m |
310.42m |
4.05mm |
-3.13m |
4.05mm |
27.01m |
35.43mm |
Case 2 |
4.7m |
0.67deg |
14.09m |
11.40m |
16.10m |
295.3m |
3.95mm |
-2.88m |
3.95mm |
25.45m |
35.46mm |
Case 3 |
5.7m |
0.69deg |
13.76m |
11.06m |
16.76m |
287.75m |
3.91mm |
-2.75m |
3.91mm |
24.67m |
35.48mm |
Layout files
The optical layout files corresponding to the above cases.