Displaying report 1-1 of 1.
Reports until 18:16, Tuesday 28 July 2026
H1 SEI
jenne.driggers@LIGO.ORG - posted 18:16, Tuesday 28 July 2026 (91299)
Distributed acoustic sensing (DAS) setup, day 2

Jenne, Wanda V, Gizem K, continuing from alog 91271 

Wanda and Gizem harvested the first tranche of data and started making some plots.  We'll continue to look more at the DAS data over the next few days.

Today we also installed the second brand of DAS interregator.  This one can only do one single fiber, so right now it's hooked up to the Yarm, and the bigger interregator is left looking at the Xarm.  The system we commissioned today is on the left, in the small 1U black box.  The bigger system is in the big case on the right.

From the overnight data, and also looking at the second interregator today, it's clear that we need absorptive termination of the fibers at the end station.  Gizem's group at EarthScope have sent termination cables to us overnight, so hopefully we'll be able to go to the end stations and connect those tomorrow, and see the noise floor of the data improve.

Images attached to this report
Displaying report 1-1 of 1.