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## page was renamed from Upgrade_09/Suspensions
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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.		 <<TableOfContents(2)>>
== ►Suspension records ==
Line 6: Line 6:
=== SOS Updates (Mostly ITMs, but where applicable, extra parts for other new Optics): === X/Y are named with the NEW convention.
Line 8: Line 8:
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.
|| '''Item''' || '''# in Drawing D960001''' || '''DCC / Part Number''' || '''Qty Needed PER SUS''' || '''Qty Needed for Upgrade''' || '''Qty Have IN HAND''' || '''Plan''' ||
|| Sensor/Actuator Plate || 1 || D960002 || 2 || 4 || 4 || DONE ||
|| Suspension Block || 2 || D960003 || 1 || 2 || 2 || DONE ||
|| Tower Base || 3 || D960004 || 1 || 2 || 2 || DONE ||
|| Right Side Plate || 4 || D960005 || 1 || 2 || 2 || DONE ||
|| Left Side Plate || 5 || D960006 || 1 || 2 || 2 || DONE ||
|| Upper Mirror Clamp || 6 || D960007 || 1 || 2 || 2 || DONE ||
|| Lower Clamp || 7 || D960008-1 || 1 || 2 || 2 || DONE ||
|| Lower Clamp, Opposite || 8 || D960008-2 || 1 || 2 || 2 || DONE ||
|| Wire Clamp || 9 || 1205308-1 (kind of #?) || 1 || 2 || 3 || DONE ||
|| Clamp, Suspension Block || 10 || D960134 || 2 || 4 || 5 || DONE ||
|| Stiffener Plate || 11 || D960009 || 1 || 2 || 2 || DONE ||
|| Dumbbell Standoff || 12 || D970075 || 6 || 7 optics x 6 = 42 || 15 in boxes from LLO, plus many in Bob's cleanroom || done? ||
|| Safety Stop, Long || 13 || D970313 || 2 || Enough to replace EQ stops for ALL optics? || || Buy screws from McMaster, drill holes for viton, clean&bake, insert viton ||
|| Optic || 14 || Various || 1 || || || DONE when delivered from ATF ||
|| Sensor/Actuator Assembly || 15 || D960011 || 5 || 10 || 6 short OSEMS in SUS Clean Plastic Box || Reuse (long) OSEMs from current ITM MOSs - DONE ||
|| Wire Standoff || 16 || D970187 || 2 || 7 optics x 2 + spares = 18 || 7 || Requested 25 from Shop. Expected in 1-2 weeks ||
|| Guide Rod || 17 || D970188 || 2 || 7 optics x 2 + spares = 18 || 3 || Requested 25 from Shop. Expected in 1-2 weeks ||
|| Magnet || 18 || D960501 || 6 || 7 optics x 6 = 42 || ~100 in Bob's Cleanroom || DONE - need to match sets still ||
|| Safety Stop, Small || 19 || D960312 || 4 || Enough to replace EQ stops for ALL optics? || || Buy screws from McMaster, drill holes for viton, clean&bake, insert viton ||
|| Safety Stop || 20 || D960311 || 4 || Enough to replace EQ stops for ALL optics? || || Buy screws from McMaster, drill holes for viton, clean&bake, insert viton ||
|| || There is no 21 || || || || || ||
|| SST Spring Plunger, 10-32 || 22 || 84985A999 (McMaster Part #) || 5 || 10 || 22 || DONE ||
|| SST SOC HD CAP Screw || 23 || 4-40, 3/8" || 4 || 8 || 10 || DONE ||
|| SST SOC HD CAP Screw || 24 || 4-40, 1/2" || 8 || 16 || 20 || DONE ||
|| SST SOC HD CAP Screw || 25 || 1/4-20, 3/4" || 20 || 40 || 50 || DONE ||
|| SST SOC HD CAP Screw || 26 || 1/4-20, 1.25" || 4 || 8 || 10 || DONE ||
|| SST Lock Washer || 27 || 1/4" || 4 || 8 || 50 || DONE ||
|| SST Washer || 28 || 1/4" || 4 || 8 || 50 || DONE ||
|| Steel Music Wire || 29 || Diam=0.0017", CFW || || || || DONE ||
|| Viton for EQ stops || || || || || || DONE - Clean Plastic Boxes ||
|| Fixtures || || || || || || @ MIT - in Progress (Rana) ||		 === 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 43: Line 16:
== 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.		 === 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 ||
Line 47: Line 24:
== MC ==
We will re align the MC suspensions so that we are centered on the mirrors this time.		 === 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(?) || - ||
Line 50: Line 32:
== Others ==
The PRM, SRM, and BS will remain SOS. No new towers.		 === 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 ||
Line 53: Line 40:
The ETMs will remain MOS. No new towers. === 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 ||



=== Gluing configuration ===
{{attachment:mirror_gluing.png}}

== ►Tip/Tilt Suspensions ==

[[Compliant_Eddy_Current_Damping_in_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 ||


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}}

The design has been modified to address this issue. The modified design is here. [[attachment:TT_ECD_Drawings_for_40m_100215.pdf]]

'''Baking order to Bob: ''' [[attachment:TTparts_2010-03-11_K_Arai.xls]]

'''Magnets: '''10mm dia. 10mm thick SmCo magnet pressed in the mirror holder.

'''Wires: '''<200um musical wire for the mirror suspension / Bram will give us tungsten wires.

'''Titanium screws:''' We try grade 3 cheap Ti screws (#2-56 3/8") ~$1.3ea (c.f. McMaster ~$15ea)

'''To Do:'''''' '''Wire Jig drawing

== ►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.

Contents

  1. ►Suspension records
  2. ►Tip/Tilt Suspensions
  3. ►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

►Tip/Tilt Suspensions

Compliant_Eddy_Current_Damping_in_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.

Bram's TT assembly document on the dcc

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

D0901164

Blade Spring

2

D0901165

Blade Wire Clamp Block

2

D0901166

Blade Wire Clamp

1

D0901404

Blade Spring Mounting Platform (Active Tip-Tilt)

1

D0901409

Viton Damper Mount

There was a problem of the backplane. A beam of the backplane blocked the laser light goes through the TT optic. TT_crosssection.png

The design has been modified to address this issue. The modified design is here. TT_ECD_Drawings_for_40m_100215.pdf

Baking order to Bob: TTparts_2010-03-11_K_Arai.xls

Magnets: 10mm dia. 10mm thick SmCo magnet pressed in the mirror holder.

Wires: <200um musical wire for the mirror suspension / Bram will give us tungsten wires.

Titanium screws: We try grade 3 cheap Ti screws (#2-56 3/8") ~$1.3ea (c.f. McMaster ~$15ea)

To Do: Wire Jig drawing

►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)