Preparation of an end or input penultimate mass (ETM-PM/ITM-PM) (Hydroxide-Catalysis Bonding of ears and gluing prisms and magnet flags)

Document #:

LIGO-E1000277-v10

Document type:

E - Engineering documents

Abstract:

This document goes through the procedure for preparing an ETM/ITM penultimate mass (D080117 and D080128) for installation into the quadruple suspension structure. The procedure consists of hydroxide catalysis bonding on a fused silica ‘ear’ (suspension element according to D080751-v1) to each of the surfaces S3 and S4 in a well-defined location, gluing wire break-off prisms to the mass, gluing magnet flags to surface S2 of the mass and re-storing the mass.

Files in Document:

• E1000277-v10.pdf (214.4 kB)

Other Files:

• E1000277-v10.docx (262.7 kB)

Topics:

• Suspensions
• Final Design

Authors:

• Marielle van Veggel
• Russell Jones
• Karen Haughian
• Liam Cunningham
• Nicola Beveridge
• Mark Barton
• Betsy Weaver
• Gerardo Moreno
• Margot Hennig

Keywords:

aLIGO suspensions quadrupole suspension monolithic suspension ETM-PM/ITM-PM hydroxide catalysis bonding break-off prisms

Notes and Changes:

v9 - New guidance on use of EP30 from M1200294. New guidance on de-gluing from E1200821.

v10 - Added information in section 2.9 on when a bonded mass is ready for shipping and insertion into a suspension.

Related Documents:

• LIGO-D0901592: ASSEMBLY DRAWING - ear bonding jig
• LIGO-D080117: Penultimate Mass, ETM Quad
• LIGO-D080128: Penultimate Mass, ITM Quad
• LIGO-D0902823: ADVANCED LIGO ETM PEN MASS OPTICS WITH PRISMS AND EARS ASSEMBLY