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| == Arm Cavity Finesse == We will change the transmission of the ITMs from 0.5% to 1.4% to match the new AdvLIGO design. |
## page was renamed from Upgrade 08 == Upgrade of the 40m == * '''[[Upgrade_09/Overview|Overview ~]]''' * '''Upgrade items & Preparation status''' * [[Upgrade_09/Configuration|Optical Configuration]] * [[Optical_Layout]] * [[Upgrade_09/ArmNaming|Arm Battesimo]] * [[Advanced_Techniques/Green_Locking|Green Locking]] * [[Upgrade_09/Length_Sensing_and_Control_Design|Length Sensing and Control Design]] * Optics * [[Aux_Optics|Aux Optics]] * [[Optics_Cleaning|Optics Cleaning Plan (Dec 2009)]] * Mechanics * [[Upgrade_09/Suspensions|Suspensions ~ SOSs and TTs]] * Electronics * [[Electronics/RF_System|RF System]] * [[Electronics/Multi_Resonant_EOM|Multi Resonant EOM]] * PSL Upgrade * [[Upgrade_09/PSL_Table_Lifting|PSL Table Lifting]] * [[Upgrade_09/PSL|New PSL Layout]] * [[CDS|New CDS]] * [[Upgrade_09/Purchase_List|Purchase List]] * '''[[Upgrade_09/Installation_Plan|Installation Plan ~]]''' |
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| We will also replace the MOS (with 1.25 kg masses) with SOSs. This is to increase the effect of radiation pressure. | == Events == * '''Dec 21, 2010:''' ETMX/Y installation, In-Vac installation finished, evacuation * '''Nov 3, 2010:''' Slow green beat note control * '''Oct 22, 2010:''' First green beat note found * '''Oct 5, 2010:''' X-End green beam reahed to the PSL table * '''Sep 27, 2010:''' 3rd Vent * '''Sep 20, 2010:''' CDS switch over to the new system * '''Sep -17, 2010:''' PSL upgrade initial work done * '''Aug 26-, 2010:''' PSL upgrade initial work * '''Aug 5-25, 2010:''' PSL table upgrade * '''Aug 1, 2010:''' Back to Vacuum * '''Jul 20, 2010:''' [[Vent_Jul_2010|2nd Vent]] * '''Jun 18, 2010:''' Input MMT installation and measurement completed * '''May 27, 2010:''' First Green Locking of the arm * '''Apr 23, 2010:''' First SHG light at the 40m for this upgrade * '''Apr 13, 2010:''' PRM/SRM removal form the table * '''Apr 12, 2010:''' ITMX SOS installation completed * '''Apr 6, 2010:''' ITMY SOS installation completed * '''Mar 2, 2010:''' Vent * '''Feb 20, 2010:''' [[Power_Shortage_Feb_2010|Power supply stop]] * '''Jan 28, 2010:''' [[TAC_Meeting-Jan_10|TAC meeting Jan 2010]] * '''Dec 7-11, 2009:''' [[Optics_Cleaning|Vent for test mass cleaning]] * '''Nov 12-17, 2009:''' ETMY CDS test |
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| We will not fine-tune the coatings of the ITMs for cool dichroic properties unless some coating place gives us a <4 month lead time. | == TAC (Technical Advisory Comittee) meetings == * [[TACs|TAC meetings]] |
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| == Modulation Frequencies == We will change the modulation frequencies from f1=33 MHz and f2 = 166 MHz to f1 = 9 MHz and f2 = 45 MHz. We will increase the length of the MC to accomodate this. == Recycling Cavities == We will increase the length of the RCs to handle the lower modulation frequency. This will require 2 tip/tilt mirrors per cavity. These will be imperial, eddy current damped versions of the ANU tip/tilt mirrors. Should we get new PR and SR or use what we have? (curvature, reflectivity). Maybe we should match the AdvLIGO Gouy phases. We will make the tip/tilts so that we can have a POP signal. We also keep POX & POY. == Mach Zender == We will not use a Mach Zender. We will use 2-3 EOMs in series or a UF Trimod if it shows up. == Control System Computers == We will have a big multi-core box to run all of the front ends. It will have fast fiber links to remote ADC/DACs. == Multi-wavelength Locking == Make wedges and coatings to accomodate multi-color locking if the lead time is reasonable. The beam from the end should not see the corner. == Optical Levers == Make a fiber based OL delivery scheme. Try to also make 40m long OLs by putting turning mirrors into the vacuum system. == Analog Electronics == === Suspensions === No change of the suspension analog electronics. We will have interface cards/connectors to go from new style ADC/DACs into the old analog electronics. === LSC === New RFPDs for the 9 & 45 MHz as well as 3*f1 (27 MHz). Maybe DD as well. == Cameras == We'll have GigE cameras and an all GigE backbone for all CDS connections. |
== Upgrade documents == * [[https://dcc.ligo.org/cgi-bin/private/DocDB/ShowDocument?docid=231|Upgrade Doc in DCC]] * [[http://lhocds.ligo-wa.caltech.edu:8000/advligo/ISC_Modeling_Software/CVSinstructions?highlight=(CVS)|"MIT CVS repository instructions for accessing AdvLIGO modeling"]] * 40m upgarde plan scrutiny Ver. 9/29/2009 [[attachment:upgrade09_090929.pdf|[PDF]]][[attachment:upgrade09_090929.graffle|[OmniGraffle]]] * 40m upgarde status Ver. 1/06/2010 [[attachment:100106_upgrade09.pdf|[PDF]]][[attachment:100106_upgrade09.graffle|[OmniGraffle]]] * 40m upgrade status (KA, '10 March LVC) [[attachment:LVC_March_40m_karai_100315.pdf|[PDF]]] [[attachment:LVC_March_40m_karai_100315.tar.gz|[tgzed graffle file ]]] |
Upgrade of the 40m
Upgrade items & Preparation status
Events
Dec 21, 2010: ETMX/Y installation, In-Vac installation finished, evacuation
Nov 3, 2010: Slow green beat note control
Oct 22, 2010: First green beat note found
Oct 5, 2010: X-End green beam reahed to the PSL table
Sep 27, 2010: 3rd Vent
Sep 20, 2010: CDS switch over to the new system
Sep -17, 2010: PSL upgrade initial work done
Aug 26-, 2010: PSL upgrade initial work
Aug 5-25, 2010: PSL table upgrade
Aug 1, 2010: Back to Vacuum
Jul 20, 2010: 2nd Vent
Jun 18, 2010: Input MMT installation and measurement completed
May 27, 2010: First Green Locking of the arm
Apr 23, 2010: First SHG light at the 40m for this upgrade
Apr 13, 2010: PRM/SRM removal form the table
Apr 12, 2010: ITMX SOS installation completed
Apr 6, 2010: ITMY SOS installation completed
Mar 2, 2010: Vent
Feb 20, 2010: Power supply stop
Jan 28, 2010: TAC meeting Jan 2010
Dec 7-11, 2009: Vent for test mass cleaning
Nov 12-17, 2009: ETMY CDS test
TAC (Technical Advisory Comittee) meetings
Upgrade documents
"MIT CVS repository instructions for accessing AdvLIGO modeling"
40m upgarde plan scrutiny Ver. 9/29/2009 [PDF][OmniGraffle]
40m upgarde status Ver. 1/06/2010 [PDF][OmniGraffle]
40m upgrade status (KA, '10 March LVC) [PDF] [tgzed graffle file]