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* [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=7588|Wide Angle Baffle assembly-procedure manual (Zeidler)]] * [[https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4660|Calculations regarding the back-scattering of different Wide Angle Baffle designs (Zeidler)]] * [[https://nbviewer.jupyter.org/urls/dl.dropbox.com/s/niycmhy8178ed0y/WAB20170224.ipynb|Personal calc of WAB's stray light noise by Akutsu]]; due to several uncertain parameters there are several results and no one would know the actual effect! |
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* Don't forget to add some heat links (Cu?) to the top of the suspension... | |
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== PIN Assign == * Summary of the pin assign of burndy connector inside the cryostat. NOTE: The meaning of color for thermometer cable is <<BR>> RED = I- , YELLOW = I+ , GREEN = V- , BLACK = V+ P22 ||Pin Name||Resistance|| Equipment || Assign || Comment1 || Comment2 || Connection || ||A||75 ohm|| Thermometer || V- || Green || Cryocon CH A || ○ || ||B||75 ohm|| Thermometer || V+ || Black || || ○ || ||C||4 ohm|| Thermometer || I- || Red || || ○ || ||D||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||E||75 ohm|| Thermometer || V- || Green || Cryocon CH B || ○ || ||F||75 ohm|| Thermometer || V+ || Black || || ○ || ||G||4 ohm|| Thermometer || I- || Red || || ○ || ||H||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||J||75 ohm|| Thermometer || V- || Green || Cryocon CH C || ○ || ||K||75 ohm|| Thermometer || V+ || Black || || ○ || ||L||4 ohm|| Thermometer || I- || Red || || ○ || ||M||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||N||Blank|| || || || || || ||P||75 ohm|| Thermometer || V- || Green || Cryocon CH D || ○ || ||R||75 ohm|| Thermometer || V+ || Black || || ○ || ||S||4 ohm|| Thermometer || I- || Red || || ○ || ||T||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||U||75 ohm|| Thermometer || V- || Green || Cryocon CH E || ○ || ||V||75 ohm|| Thermometer || V+ || Black || || ○ || ||W||4 ohm|| Thermometer || I- || Red || || ○ || ||X||4 ohm|| Thermometer || I+ || Yellow || || ○ || ||Y||Blank|| || || || || || P23 ||Pin Name||Resistance|| Equipment || Assign || Comment1 || Comment2 || Connection || ||A||75 ohm|| Thermometer || V- || Green || Cryocon CH F || × || ||B||75 ohm|| Thermometer || V+ || Black || || × || ||C||4 ohm|| Thermometer || I- || Red || || × || ||D||4 ohm|| Thermometer || I+ || Yellow || || × || ||E||75 ohm|| PS PD || V- || || || × || ||F||75 ohm|| PS PD || V+ || || || × || ||G||4 ohm|| PS LED || I- || || || × || ||H||4 ohm|| PS LED || I+ || || || × || ||J||75 ohm|| PS PD || V- || || || × || ||K||75 ohm|| PS PD || V+ || || || × || ||L||4 ohm|| PS LED || I- || || || × || ||M||4 ohm|| PS LED || I+ || || || × || ||N||Blank|| || || || || || ||P||75 ohm|| PS PD || V- || || || × || ||R||75 ohm|| PS PD || V+ || || || × || ||S||4 ohm|| PS LED || I- || || || × || ||T||4 ohm|| PS LED || I+ || || || × || ||U||75 ohm|| CM Act. || I- || || || × || ||V||75 ohm|| CM Act. || I+ || || || × || ||W||4 ohm|| Heater || I- || || || ○ || ||X||4 ohm|| Heater || I+ || || || ○ || ||Y||Blank|| || || || || || {{attachment:burndy_cryostat.png | Diagram|width="300" }} |
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== OpLev == * Optical lever installed at the +X/-Y side of the IYC * Path-length inside the chamber (viewport to viewport): ~3000 mm {{attachment:ETMchamber_WAB_oplev_beams3.PNG| Diagram|width="500"}} == WAB Alignment == * Alignment done with 2 laser-leveler inside the IYC * Regarding the used terms: * As the baffle is placed along the Y-arm, +Y and -Y refer to both long ends of the baffle toward the Y-end and toward the center area, respectively! * The same holds true for the horizontal dimension in x-arm direction (+X means toward X-end and -X toward center/PSL) === Yaw === * laser-leveler needs to be close to the -Y main-beam entrance in a height 300 - 400 mm above the optical table * Vertical laser line to be adjusted to the main-beam indication on the optical table and the inner wall of the cryostat * Checked the line by using the slids of the flanges on top the WAB (each slid is ~3.5 mm broad) * For both slids, the laser line is mismatched (not centered) toward -X by ~0.5 mm (@ +Y slid) and ~1 mm (@ -Y slid) That means that there is probably also a -X offset! * The flanges have a distance of 170 mm which indicates a maximum yaw-tilting of ~0.1 degrees '''Note:''' taking the distances is very hard as the position of the slids is not easy to access === Pitch === * laser-leveler outside the cryostat (but inside IYC) set to give a horizontal line along length side of the baffle * Found a slight mismatch for the outer screw holding the OpLev mirrors in +Y,+X and -Y,+X * Difference is ~1 mm (+Z @ -Y, so -Y-side is higher than +Y-side) * With approx. 500 mm distance between both screws, the maximum pitch is ~0.1 degrees === Roll === * Took the height of the OpLev mirror screw-holes (@ -Y,+X and -Y,-X) with a vertical ruler and the horizontal line of the laser-leveler outside the cryostat * Measured a difference of 2.5 mm which makes it a roll of 0.55 degrees (radius of baffle ~130 mm); -Y,-X is higher! * Then took the height of baffle-wings which are mounted on the flanges and could not measure any difference (within an error of 0.5 mm) * Hence, only the baffle is slightly rolled within the flanges! {{attachment:baffle_wing_+X_laser_level.jpg| Diagram|width="500"}} |
Wide Angle Baffle Cooling Test 2018
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Links to knowledge
Calculations regarding the back-scattering of different Wide Angle Baffle designs (Zeidler)
Personal calc of WAB's stray light noise by Akutsu; due to several uncertain parameters there are several results and no one would know the actual effect!
Heat links positions (by Obuchi) fmkopgehpapgdkcc.png
Task list
Note: some of the tasks can be done in parallel.
- Place/install the WAB suspension.
- Measure several relative dimensions to get useful information for the future commissioning; concretely speaking:
- What....?
Test the saving mode of the WAB suspension.
Don't forget to replace the damping magnets to SmCo ones.
- What is the requirement to say the damping is sufficient...?
- Connect electric cables (with checking) in the IYC chamber.
3 photosensors; in each photosensor head, two PDs should be connected parallel. Need to calibrate the response of each sensor head...
- 2 heaters; should be connected parallel??
- 1 coil for actuation.
6 thermometers with (extended?) patch cables made of phospher bronze; the extended double twisted pare cables will be delivered on Jan 26
- Connect 4 heat links.
- Check oplev signals.
- Connect cables the outside as well.
- Make a realtime model to monitor.
- Take interface with Tcam.
- Make a plan to do leak check before cooling down.
- Don't forget to add some heat links (Cu?) to the top of the suspension...
PIN Assign
- Summary of the pin assign of burndy connector inside the cryostat.
NOTE: The meaning of color for thermometer cable is
RED = I- , YELLOW = I+ , GREEN = V- , BLACK = V+
P22
Pin Name |
Resistance |
Equipment |
Assign |
Comment1 |
Comment2 |
Connection |
A |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH A |
○ |
B |
75 ohm |
Thermometer |
V+ |
Black |
|
○ |
C |
4 ohm |
Thermometer |
I- |
Red |
|
○ |
D |
4 ohm |
Thermometer |
I+ |
Yellow |
|
○ |
E |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH B |
○ |
F |
75 ohm |
Thermometer |
V+ |
Black |
|
○ |
G |
4 ohm |
Thermometer |
I- |
Red |
|
○ |
H |
4 ohm |
Thermometer |
I+ |
Yellow |
|
○ |
J |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH C |
○ |
K |
75 ohm |
Thermometer |
V+ |
Black |
|
○ |
L |
4 ohm |
Thermometer |
I- |
Red |
|
○ |
M |
4 ohm |
Thermometer |
I+ |
Yellow |
|
○ |
N |
Blank |
|
|
|
|
|
P |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH D |
○ |
R |
75 ohm |
Thermometer |
V+ |
Black |
|
○ |
S |
4 ohm |
Thermometer |
I- |
Red |
|
○ |
T |
4 ohm |
Thermometer |
I+ |
Yellow |
|
○ |
U |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH E |
○ |
V |
75 ohm |
Thermometer |
V+ |
Black |
|
○ |
W |
4 ohm |
Thermometer |
I- |
Red |
|
○ |
X |
4 ohm |
Thermometer |
I+ |
Yellow |
|
○ |
Y |
Blank |
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P23
Pin Name |
Resistance |
Equipment |
Assign |
Comment1 |
Comment2 |
Connection |
A |
75 ohm |
Thermometer |
V- |
Green |
Cryocon CH F |
× |
B |
75 ohm |
Thermometer |
V+ |
Black |
|
× |
C |
4 ohm |
Thermometer |
I- |
Red |
|
× |
D |
4 ohm |
Thermometer |
I+ |
Yellow |
|
× |
E |
75 ohm |
PS PD |
V- |
|
|
× |
F |
75 ohm |
PS PD |
V+ |
|
|
× |
G |
4 ohm |
PS LED |
I- |
|
|
× |
H |
4 ohm |
PS LED |
I+ |
|
|
× |
J |
75 ohm |
PS PD |
V- |
|
|
× |
K |
75 ohm |
PS PD |
V+ |
|
|
× |
L |
4 ohm |
PS LED |
I- |
|
|
× |
M |
4 ohm |
PS LED |
I+ |
|
|
× |
N |
Blank |
|
|
|
|
|
P |
75 ohm |
PS PD |
V- |
|
|
× |
R |
75 ohm |
PS PD |
V+ |
|
|
× |
S |
4 ohm |
PS LED |
I- |
|
|
× |
T |
4 ohm |
PS LED |
I+ |
|
|
× |
U |
75 ohm |
CM Act. |
I- |
|
|
× |
V |
75 ohm |
CM Act. |
I+ |
|
|
× |
W |
4 ohm |
Heater |
I- |
|
|
○ |
X |
4 ohm |
Heater |
I+ |
|
|
○ |
Y |
Blank |
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DAQ
Real-time computer: k1???
Slot |
Item |
Assigned to |
S/N |
42 |
<blank> |
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41 |
<blank> |
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40 |
<blank> |
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39 |
<blank> |
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38 |
<blank> |
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37 |
<blank> |
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36 |
<blank> |
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35 |
<blank> |
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34 |
<blank> |
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33 |
<blank> |
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32 |
<blank> |
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31 |
<blank> |
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30 |
<blank> |
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29 |
<blank> |
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28 |
<blank> |
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27 |
<blank> |
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26 |
<blank> |
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25 |
<blank> |
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24 |
<blank> |
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23 |
<blank> |
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22 |
<blank> |
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21 |
<blank> |
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20 |
<blank> |
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19 |
<blank> |
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18 |
<blank> |
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17 |
<blank> |
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16 |
<blank> |
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15 |
<blank> |
|
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14 |
<blank> |
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13 |
<blank> |
|
|
12 |
AI Chassis |
DAC0 |
SN??? |
11 |
AA Chassis |
ADC0 |
SN??? |
10 |
<blank> |
|
|
9 |
I/O Chassis |
|
SN??? |
8 |
<blank> |
|
|
7 |
<blank> |
|
|
6 |
<blank> |
|
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5 |
<blank> |
|
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4 |
<blank> |
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3 |
<blank> |
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2 |
<blank> |
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1 |
<blank> |
|
|
0 |
<blank> |
|
|
OpLev
- Optical lever installed at the +X/-Y side of the IYC
- Path-length inside the chamber (viewport to viewport): ~3000 mm
WAB Alignment
- Alignment done with 2 laser-leveler inside the IYC
- Regarding the used terms:
- As the baffle is placed along the Y-arm, +Y and -Y refer to both long ends of the baffle toward the Y-end and toward the center area, respectively!
- The same holds true for the horizontal dimension in x-arm direction (+X means toward X-end and -X toward center/PSL)
Yaw
- laser-leveler needs to be close to the -Y main-beam entrance in a height 300 - 400 mm above the optical table
- Vertical laser line to be adjusted to the main-beam indication on the optical table and the inner wall of the cryostat
- Checked the line by using the slids of the flanges on top the WAB (each slid is ~3.5 mm broad)
- For both slids, the laser line is mismatched (not centered) toward -X by ~0.5 mm (@ +Y slid) and ~1 mm (@ -Y slid)
That means that there is probably also a -X offset!
- The flanges have a distance of 170 mm which indicates a maximum yaw-tilting of ~0.1 degrees
Note: taking the distances is very hard as the position of the slids is not easy to access
Pitch
- laser-leveler outside the cryostat (but inside IYC) set to give a horizontal line along length side of the baffle
Found a slight mismatch for the outer screw holding the OpLev mirrors in +Y,+X and -Y,+X
- Difference is ~1 mm (+Z @ -Y, so -Y-side is higher than +Y-side)
- With approx. 500 mm distance between both screws, the maximum pitch is ~0.1 degrees
Roll
Took the height of the OpLev mirror screw-holes (@ -Y,+X and -Y,-X) with a vertical ruler and the horizontal line of the laser-leveler outside the cryostat
- Measured a difference of 2.5 mm which makes it a roll of 0.55 degrees (radius of baffle ~130 mm); -Y,-X is higher!
- Then took the height of baffle-wings which are mounted on the flanges and could not measure any difference (within an error of 0.5 mm)
- Hence, only the baffle is slightly rolled within the flanges!