Diff for "Suspensions/OSEMs"

Differences between revisions 65 and 67 (spanning 2 versions)

Contents

►Suspension records
►Tip/Tilt Suspensions
►Other suspensions

►Suspension records

X/Y are named with the NEW convention.

ITMX

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
LR	264	1.49	0.745
LL	219	1.56	0.780
SD	261	1.68	0.840

ITMY

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
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	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	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	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

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.

-  ⇤ ← Revision 65 as of 2011-08-23 02:02:28 → 
  Size: 5301
  Editor: KiwamuIzumi
  Comment:
+   ← Revision 67 as of 2011-08-23 02:08:11 → ⇥
  Size: 5303
  Editor: KiwamuIzumi
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 70:
-||  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 ||
+||  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 ||
 Line 88:
-||  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 ||
+||  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 ||