Diff for "Suspensions/OSEMs"

Differences between revisions 70 and 71

Contents

►Suspension records
►Other suspensions

►Suspension records

X/Y are named with the NEW convention.

ITMX

OSEM	S/N	Max out	Max/2	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	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	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	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

►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 70 as of 2012-02-07 01:48:23 → 
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  Editor: KiwamuizumiATligoDOTorg
  Comment: upgrade 09 is too old
+   ← Revision 71 as of 2012-02-07 01:49:18 → ⇥
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  Editor: KiwamuizumiATligoDOTorg
  Comment:
-Deletions are marked like this.
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-== ►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