Differences between revisions 4 and 57 (spanning 53 versions)
⇤ ← Revision 4 as of 2009-10-29 21:16:40 →
Size: 3763
Editor: JenneDriggers
Comment:
← Revision 57 as of 2010-12-01 09:00:30 → ⇥
Size: 9641
Editor: KiwamuIzumi
Comment:
Deletions are marked like this. Additions are marked like this.
Line 2: Line 2:
== 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 ==
=== ITMX ===
|| 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 ||
|| LL || 207 || 1.903 || 0.952 ||
|| LR || 303 || 1.670 || 0.835 ||
|| SD || 277 || 2.002 || 1.001 ||

=== ITMY ===
|| OSEM || S/N || Max out || Max/2 ||<v|6> attachment:ITMY_OSEM.png||Satellite Box #???||
|| UL || 284 || 2.09 || 1.045 ||
|| UR || 306 || 1.71 || 0.855 ||
|| LL || 219 || 1.56 || 0.780 ||
|| LR || 264 || 1.49 || 0.745 ||
|| SD || 261 || 1.68 || 0.840 ||

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

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



=== 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 ||
|| LL || 511 || 2.076 || 1.038 ||
|| LR || 504 || 1.934 || 0.967 ||
|| 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 ||
|| LL || 519 || 2.071 || 1.036 ||
|| LR || 515 || 1.636 || 0.818 ||
|| 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 ||
|| LL || - || 1.38 || 0.69 ||
|| LR || - || 1.57 || 0.785 ||
|| SD || - || 1.57 || 0.785 ||


== ►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.
Line 7: Line 74:
 * 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.
Line 8: Line 85:
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.
|| '''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) ||		 || '''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:green.png DONE ||
|| 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:green.png DONE ||
|| Safety Stop, Small || 19 || D960312 || 4 || Enough to replace EQ stops for ALL optics? (40) || || attachment:green.png DONE ||
|| Safety Stop || 20 || D960311 || 4 || Enough to replace EQ stops for ALL optics? (40) || || attachment:green.png DONE ||
|| || 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:green.png DONE ||
|| Fixtures || || || || || || attachment:green.png Borrowed from Drever Lab. ||
Line 42: Line 118:
== 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.
Line 46: Line 119:
== MC ==
We will re align the MC suspensions so that we are centered on the mirrors this time.		 === Gluing configuration ===
attachment:mirror_gluing.png
Line 49: Line 122:
== Others ==
The PRM, SRM, and BS will remain SOS. No new towers.		 == ►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.
Line 52: Line 125:
The ETMs will remain MOS. No new towers. 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. ►ITM Suspensions
  3. ►Tip/Tilt Suspensions
  4. ►Other suspensions

►Suspension records

ITMX

OSEM

S/N

Max out

Max/2

attachment:ITMX_OSEM.png

Satellite Box #105

UL

220

1.788

0.894

UR

289

1.656

0.828

LL

207

1.903

0.952

LR

303

1.670

0.835

SD

277

2.002

1.001

ITMY

OSEM

S/N

Max out

Max/2

attachment:ITMY_OSEM.png

Satellite Box #???

UL

284

2.09

1.045

UR

306

1.71

0.855

LL

219

1.56

0.780

LR

264

1.49

0.745

SD

261

1.68

0.840

ETMX

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

526

1.47

0.735

UR

567

1.36

0.68

LL

511

1.76

0.88

LR

513

1.60

0.80

SD

590

0.108(?)

-

ETMY

OSEM

S/N

Max out

Max/2

Satellite Box #???

UL

-

-

-

UR

-

-

-

LL

-

-

-

LR

-

-

-

SD

-

-

-

PRM

OSEM

S/N

Max out

Max/2

attachment:PRM_OSEM.png

Satellite Box #???

UL

516

1.748

0.874

Short OSEMs

UR

520

1.695

0.848

LL

511

2.076

1.038

LR

504

1.934

0.967

SD

500

9.21 1.680

4.605

SRM

OSEM

S/N

Max out

Max/2

attachment:SRM_OSEM.png

Satellite Box #???

UL

522

1.744

0.872

Short OSEMs

UR

513

1.773

0.887

LL

519

2.071

1.036

LR

515

1.636

0.818

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

LL

-

1.38

0.69

LR

-

1.57

0.785

SD

-

1.57

0.785

►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.

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:green.png DONE

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:green.png DONE

Safety Stop, Small

19

D960312

4

Enough to replace EQ stops for ALL optics? (40)

attachment:green.png DONE

Safety Stop

20

D960311

4

Enough to replace EQ stops for ALL optics? (40)

attachment:green.png DONE

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:green.png DONE

Fixtures

attachment:green.png Borrowed from Drever Lab.

Gluing configuration

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

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.

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