Witness sample, SN0932-21 LMA Coating Run C11068

Document #:

LIGO-E2000107-v1

Document type:

E - Engineering documents

Abstract:

A catalog of links for advanced LIGO (aLIGO) era coating witness samples proveded by LMA for purposes of point absorber investigation and mitigation. Each sample is assigned a unique DCC number, then test data are linked to that branch.

HR ITM AdV. LIGO Rotation No Mask

Core Optics witness samples are found at E2000020

Master filecard found at E2000079

Source document for SEM results (LIGO.org sharing)
https://docs.google.com/presentation/d/1It6DrFTgx_lsHN8bBcW72eqFvoo6tasEw6rtWGqUmnc/edit?usp=sharing

Files in Document:

• Gentle absorption 20 mm diameter ~50 ppm noise floor. (c11068-21_sn0932_itm-hrw_042220_1.pdf, 28.6 kB)
• Gentle absorption scan at point-a after the laser ablation (sn0932-a_sum_073021.pdf, 317.8 kB)
• Gentle absorption scan at point-a after the plasma cleaning (c11068-21_sn0932-a_hrabs_082421_1.pdf, 18.3 kB)
• Gentle absorption scan at point-a after the plasma cleaning, then annealing at 300 C (c11068-21_sn0932-a_hrabs_090321_1.pdf, 18.9 kB)

Other Files:

• E2000107 Witness Sample SN0932 SEM.pdf (780.7 kB)
• sn0932_points_coordinates.xlsx (12.4 kB)

Topics:

• Subsystem Test
• Core Optics

Authors:

• GariLynn Billingsley
• Liyuan Zhang
• Stephen Appert
• Marie Kasprzack
• Alena Ananyeva
• Christophe Michel
• Laurent Pinard

Referenced by:

• LIGO-E2000079-v2: Description of Advanced LIGO era coating witness samples