LIGO Document G1200071-v11

LIGO Seismic Isolation and Suspensions Cartoon

Document #:
LIGO-G1200071-v11
Document type:
G - Presentations (eg Graphics)
Other Versions:
LIGO-G1200071-v10
16 May 2025, 08:24
LIGO-G1200071-v9
08 May 2025, 14:59
LIGO-G1200071-v8
22 Aug 2024, 12:29
LIGO-G1200071-v7
27 Jan 2022, 11:05
LIGO-G1200071-v5
13 Nov 2017, 17:06
LIGO-G1200071-v4
08 Nov 2017, 13:26
LIGO-G1200071-v3
11 Dec 2013, 18:55
Abstract:
In graphical form, defines which optics get what type (and how many layers) of seismic isolation and suspensions for LIGO.

Google source:
H1 https://docs.google.com/presentation/d/1DQdeGdiyyzuTjJvuFG8mMRaDTGoQRg1ImqZ4JKTam2c/edit?usp=sharing
L1 https://docs.google.com/presentation/d/1HQSlxQfC5nXDjEHL-e0mBkLfJCk3gf8p6-s9RixWYMQ/edit?usp=sharing

(The above links are editable by the LVK. Please copy the slide over to your own google drive before editing. Just in case, Jeff is keeping a primary copy completely separate and restricted from the one shared. Also note that the optical layout and vacuum chambers are built in to the slide as a part of the "theme" so that you can remove / add any labels you want. To access/change that core drawing, go to the "view > theme builder" and select the THEME page.)

Files in Document:
Other Files:
Notes and Changes:
-v11 MAJOR The optical layout has necessarily bifurcated as the two sites are blazing two different paths -- and the those paths may not re-converge before the next observing run. Both sites are installing a bigger beam splitter and its new suspension (a BBSS, still called "BS"), and (because we have it) the first HAM Relay Triple Suspension (an HRTS, called "LO2") from A+ O5 attached on the side of the BBSS cage. However, H1 installs a jitter attenuation cavity (JAC), which adds two HTTSs JM1 and JM3, and IOT1 on the -Y side of HAM1; L1 completely revamps HAM6 to install Phase A of the BHD system, including new suspension types HATS (called OM0), HCDS (called OMA3), and the BHSS (called "OMCAB"). In general, WFS appear for the first time -- the re-vamp of HAM6 for BHD means new HTTSs AM1 and AM2 on the way to the AS WFS, so this diagram "has" to include the AS WFS, so I figure its easy to add the REFL and POP WFS too.

-v10 MINOR Corrected HAM6 ISI; it's only a 'HAM-ISI + HEPI;' was correct in -v8, was just an oversight in -v9's complete recreation.

-v9 MAJOR Per O4C upgrades, HAM1 seismic isolation changed from passive stack to ISI, POP path has now been added to call-out new PM1 suspension. Added a bit more legend, given now there's more than one periscope. Added laser enclosure. Converted source to using google slides rather than Omnigraffle.

-v8 MINOR correction to the location of SQZT7 and SQZT0.

-v7 MAJOR now includes laser tables.

-v6 MAJOR now includes new suspensions installed for the squeezed light injection system for O4.


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