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## page was renamed from Upgrade_09/Suspensions
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<<TableOfContents(2)>>
== ►Suspension records ==
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<<TableOfContents(2)>> X/Y are named with the NEW convention.
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== ►ITM Suspensions ==
The ITMs are being changed into SOS. For this we will need to fab 2 SOS towers. We will re-use existing OSEMs and misc in-vac hardware.
=== SOS Updates (Mostly ITMs, but where applicable, extra parts for other new Optics): ===
 * 29 Oct 2009 - Most of the parts are here, only the EQ stops are left to be dealt with. Most of this stuff needs to visit Bob's lab for cleaning.
 * 30 Oct 2009 - Screws for EQ stops ordered. Also, fixtures should be sent from MIT ~today, so we should get them soon.
 * 3 Nov 2009 - Most of the screws for EQ stops have arrived (a few were backordered, and will be here shortly). Now I need to drill them / have the shop drill them for the viton.
 * 5 Nov 2009 - Most of the 6-32 screws have been drilled for the viton. The 1/4-20 3/4" screws have arrived, but the 1/4-20 1.5" screws won't be here until early December.
 * 17 Nov 2009 - 50 of the 1/4-20 3/4" screws have been drilled. The 1/4-20 1.25" screws arrived, and need drilling. Also, the wire standoffs and guiderods have arrived from the shop. They just need to be cleaned (just like all the other stuff).
 * 20 Dec 2009 - All of the remaining needed EQ stop screws have been drilled.
 * 28 Dec 2009 - Another email sent to Tim @ MIT to check on the status of the Guide Rod fixture...he said he has it and would send it, but it hasn't arrived here yet.
 * 4 Jan 2010 - Bob has started cleaning all of the suspension hardware. Guide Rod Fixture from MIT has arrived.
 * 6 Jan 2010 - Since the ETMs will also be SOS, we need to have 2 more towers fabricated, and then cleaned. Some of the hardware (washers, screws etc) we have enough for all 4 new towers, but much of it will need to be manufactured. Koji is in charge of this.
 * 11 Jan 2010 - All the SOS stuff is cleaned and baked, ready to start gluing and assembling. We need to get EPOXY and a WINCH FIXTURE, but other than that we're pretty much ready to start assembling the 2 ITM towers.		 === ITMX ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> {{attachment:ITMY_OSEM.png}}||Satellite Box #???||
|| UL || 284 || 1.97 || 0.985 ||
|| UR || 306 || 1.71 || 0.855 ||
|| LR || 264 || 1.47 || 0.735 ||
|| LL || 219 || 1.55 || 0.775 ||
|| SD || 261 || 1.67 || 0.835 ||
Line 19: Line 16:
|| '''Item''' || '''# in Drawing D960001''' || '''DCC / Part Number''' || '''Qty Needed PER SUS''' || '''Qty Needed for Upgrade (Only ITMs so far)''' || '''Qty Have IN HAND''' || '''Plan''' ||
|| Sensor/Actuator Plate || 1 || D960002 || 2 || 4 || 4 || attachment:green.png DONE ||
|| Suspension Block || 2 || D960003 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Tower Base || 3 || D960004 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Right Side Plate || 4 || D960005 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Left Side Plate || 5 || D960006 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Upper Mirror Clamp || 6 || D960007 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Lower Clamp || 7 || D960008-1 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Lower Clamp, Opposite || 8 || D960008-2 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Wire Clamp || 9 || 1205308-1 (kind of #?) || 1 || 2 || 3 || attachment:green.png DONE ||
|| Clamp, Suspension Block || 10 || D960134 || 2 || 4 || 5 || attachment:green.png DONE ||
|| Stiffener Plate || 11 || D960009 || 1 || 2 || 2 || attachment:green.png DONE ||
|| Dumbbell Standoff || 12 || D970075 || 6 || 7 optics x 6 = 42 || 15 in boxes from LLO, plus many in Bob's cleanroom || attachment:green.png DONE ||
|| Safety Stop, Long || 13 || D970313 || 2 || Enough to replace EQ stops for ALL optics? (20) || || attachment:orange.png Holes drilled. Need to insert viton ||
|| Optic || 14 || Various || 1 || || || attachment:green.png DONE when delivered from ATF ||
|| Sensor/Actuator Assembly || 15 || D960011 || 5 || 10 || 6 short OSEMS in SUS Clean Plastic Box || attachment:green.png Reuse (long) OSEMs from current ITM MOSs - DONE ||
|| Wire Standoff || 16 || D970187 || 2 || 7 optics x 2 + spares = 18 || 7 + 25 from shop || attachment:green.png DONE ||
|| Guide Rod || 17 || D970188 || 2 || 7 optics x 2 + spares = 18 || 3 + 25 from shop || attachment:green.png DONE ||
|| Magnet || 18 || D960501 || 6 || 7 optics x 6 = 42 || ~100 in Bob's Cleanroom || attachment:orange.png DONE - need to match sets still ||
|| Safety Stop, Small || 19 || D960312 || 4 || Enough to replace EQ stops for ALL optics? (40) || || attachment:orange.png Holes drilled. Need to insert viton ||
|| Safety Stop || 20 || D960311 || 4 || Enough to replace EQ stops for ALL optics? (40) || || attachment:orange.png Holes drilled. Need to insert viton ||
|| || There is no 21 || || || || || ||
|| SST Spring Plunger, 10-32 || 22 || 84985A999 (McMaster Part #) || 5 || 10 || 22 || attachment:green.png DONE ||
|| SST SOC HD CAP Screw || 23 || 4-40, 3/8" || 4 || 8 || 10 || attachment:green.png DONE ||
|| SST SOC HD CAP Screw || 24 || 4-40, 1/2" || 8 || 16 || 20 || attachment:green.png DONE ||
|| SST SOC HD CAP Screw || 25 || 1/4-20, 3/4" || 20 || 40 || 50 || attachment:green.png DONE ||
|| SST SOC HD CAP Screw || 26 || 1/4-20, 1.25" || 4 || 8 || 10 || attachment:green.png DONE ||
|| SST Lock Washer || 27 || 1/4" || 4 || 8 || 50 || attachment:green.png DONE ||
|| SST Washer || 28 || 1/4" || 4 || 8 || 50 || attachment:green.png DONE ||
|| Steel Music Wire || 29 || Diam=0.0017", CFW || || || || attachment:green.png DONE ||
|| Viton for EQ stops || || || || || || attachment:orange.png DONE - In clean plastic boxes. Need to cut to size. ||
|| Fixtures || || || || || || attachment:orange.png Still need Winch Fixture - Steve is checking Drever Lab. ||		 === ITMY ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> {{attachment:ITMX_OSEM.png}}||Satellite Box #105||
|| UL || 220 || 1.788 || 0.894 ||
|| UR || 289 || 1.656 || 0.828 ||
|| LR || 303 || 1.670 || 0.835 ||
|| LL || 207 || 1.903 || 0.952 ||
|| SD || 277 || 2.002 || 1.001 ||

=== ETMX ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || 526 || 1.47 || 0.735 ||
|| UR || 567 || 1.36 || 0.68 ||
|| LR || 513 || 1.60 || 0.80 ||
|| LL || 511 || 1.76 || 0.88 ||
|| SD || 590 || 0.108(?) || - ||

=== ETMY ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || 502 || 1.7 || 0.85 ||
|| UR || 568 || 1.631 || 0.8155 ||
|| LR || 226 || 2.105 || 1.0525 ||
|| LL || 205 || 1.582 || 0.791 ||
|| SD || 552 || 1.490 || 0.745 ||

=== PRM ===

|| OSEM || S/N || Max out || Max/2 ||<v|6> {{attachment:PRM_OSEM.png}}||Satellite Box #???||
|| UL || 516 || 1.748 || 0.874 ||Short OSEMs||
|| UR || 520 || 1.695 || 0.848 ||
|| LR || 504 || 1.934 || 0.967 ||
|| LL || 511 || 2.076 || 1.038 ||
|| SD || 500 || 9.21 --(1.680)-- || 4.605||

 . /!\ '' Valera changed the trans impedance gain of SD OSEM '' [[http://nodus.ligo.caltech.edu:8080/40m/3913|ELOG#3913]]

=== SRM ===

|| OSEM || S/N || Max out || Max/2 ||<v|6> {{attachment:SRM_OSEM.png}}||Satellite Box #???||
|| UL || 522 || 1.744 || 0.872 ||Short OSEMs||
|| UR || 513 || 1.773 || 0.887 ||
|| LR || 515 || 1.636 || 0.818 ||
|| LL || 519 || 2.071 || 1.036 ||
|| SD || 502 || 1.758 || 0.879 ||


=== BS ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || - || 1.50 || 0.75 ||
|| UR || - || 1.57 || 0.785 ||
|| LR || - || 1.57 || 0.785 ||
|| LL || - || 1.38 || 0.69 ||
|| SD || - || 1.57 || 0.785 ||

=== MC1 ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || - || 1.3 || 0.650 ||
|| UR || - || 1.4 || 0.700 ||
|| LR || - || 1.45 || 0.725 ||
|| LL || - || 1.56 || 0.780 ||
|| SD || - || 1.67 || 0.835 ||


=== MC2 ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || - || - || - ||
|| UR || - || - || - ||
|| LR || - || - || - ||
|| LL || - || - || - ||
|| SD || - || - || - ||


=== MC3 ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> ||Satellite Box #???||
|| UL || - || 1.37 || 0.685 ||
|| UR || - || 1.71 || 0.855 ||
|| LR || - || 1.77 || 0.885 ||
|| LL || - || 1.56 || 0.780 ||
|| SD || - || 1.59 || 0.795 ||
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attachment:mirror_gluing.png

== ►Tip/Tilt Suspensions ==
For the PRC/SRC folding we will use Tip/Tilt stages modified to be used passively. No active damping, no coil drive. Just magnets and natural eddy current damping.

We have got five initial TT delivery. 4 is for the PRC/SRC folding. 1 is for tests/spare. We would employ 4 more TTs for the Input/Output steering, though we should seriously consider the foot prints of them.

[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=7074 Bram's TT assembly document on the dcc]

[http://ilog.ligo-wa.caltech.edu:7285/advligo/Tip-Tilt_Stage/Tip-Tilt_Mechanical_Design Bram's TT wiki / drawings]

We will employ vertical springs designed by Valera@LLO. Mike@LLO suggested the items additionally needed for attaching the vertical springs.

|| '''Qty.''' || '''DCC No.''' || '''Item''' ||
|| 2 || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=2836 D0901164] || Blade Spring ||
|| 2 || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=2837 D0901165] || Blade Wire Clamp Block ||
|| 2 || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=2838 D0901166] || Blade Wire Clamp ||
|| 1 || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3653 D0901404] || Blade Spring Mounting Platform (Active Tip-Tilt) ||
|| 1 || [https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=3682 D0901409] || Viton Damper Mount ||		 {{attachment:mirror_gluing.png}}
Line 74: Line 101:
There was a problem of the backplane. A beam of the backplane blocked the laser light goes through the TT optic. attachment:TT_crosssection.png == ►Other suspensions ==
We will realign the MC suspensions so that we are centered on the mirrors this time.
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The design has been modified to address this issue. The modified design is here. attachment:TT_ECD_Drawings_for_40m_100215.pdf

'''To Do:''' '''Wire Jig drawing, Magnets, Wires, Titanium screws'''

== ►Other suspensions ==
We will re align the MC suspensions so that we are centered on the mirrors this time.

The PRM, SRM, and BS will remain SOS. No new towers.

The ETMs will be replaced to the SOSs later.		 The PRM, SRM, and BS will remain SOS. No new towers.The ETMs will be replaced to the SOSs later. They exist on the flow bench at the Yend.

Contents

  1. ►Suspension records
  2. ►Other suspensions

►Suspension records

X/Y are named with the NEW convention.

ITMX

OSEM

S/N

Max out

Max/2

ITMY_OSEM.png

Satellite Box #???

UL

284

1.97

0.985

UR

306

1.71

0.855

LR

264

1.47

0.735

LL

219

1.55

0.775

SD

261

1.67

0.835

ITMY

OSEM

S/N

Max out

Max/2

ITMX_OSEM.png

Satellite Box #105

UL

220

1.788

0.894

UR

289

1.656

0.828

LR

303

1.670

0.835

LL

207

1.903

0.952

SD

277

2.002

1.001

ETMX

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

526

1.47

0.735

UR

567

1.36

0.68

LR

513

1.60

0.80

LL

511

1.76

0.88

SD

590

0.108(?)

-

ETMY

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

502

1.7

0.85

UR

568

1.631

0.8155

LR

226

2.105

1.0525

LL

205

1.582

0.791

SD

552

1.490

0.745

PRM

OSEM

S/N

Max out

Max/2

PRM_OSEM.png

Satellite Box #???

UL

516

1.748

0.874

Short OSEMs

UR

520

1.695

0.848

LR

504

1.934

0.967

LL

511

2.076

1.038

SD

500

9.21 1.680

4.605

  • /!\ Valera changed the trans impedance gain of SD OSEM ELOG#3913

SRM

OSEM

S/N

Max out

Max/2

SRM_OSEM.png

Satellite Box #???

UL

522

1.744

0.872

Short OSEMs

UR

513

1.773

0.887

LR

515

1.636

0.818

LL

519

2.071

1.036

SD

502

1.758

0.879

BS

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

-

1.50

0.75

UR

-

1.57

0.785

LR

-

1.57

0.785

LL

-

1.38

0.69

SD

-

1.57

0.785

MC1

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

-

1.3

0.650

UR

-

1.4

0.700

LR

-

1.45

0.725

LL

-

1.56

0.780

SD

-

1.67

0.835

MC2

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

-

-

-

UR

-

-

-

LR

-

-

-

LL

-

-

-

SD

-

-

-

MC3

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

-

1.37

0.685

UR

-

1.71

0.855

LR

-

1.77

0.885

LL

-

1.56

0.780

SD

-

1.59

0.795

Gluing configuration

mirror_gluing.png

►Other suspensions

We will realign the MC suspensions so that we are centered on the mirrors this time.

The PRM, SRM, and BS will remain SOS. No new towers.The ETMs will be replaced to the SOSs later. They exist on the flow bench at the Yend.

Suspensions/OSEMs (last edited 2012-02-07 01:51:48 by KiwamuizumiATligoDOTorg)