Monitoring Void Fraction and Bubble Formation in Flowing Liquid Nitrogen

Document #:

LIGO-G1701534-v1

Document type:

G - Presentations (eg Graphics)

Abstract:

Optical monitoring of bubble formation to determine density fluctuations in liquid nitrogen flowing through a pipe. Density changes in the liquid nitrogen used in the cryogenics system result in changing gravitational forces, better known as Newtonian Noise. This technique will be useful to determine the required conditions for the flow to have Newtonian Noise compliant with the desired sensitivity levels of LIGO Voyager.

Files in Document:

• Monitoring Liquid Nitrogen.pdf (9.3 MB)

Topics:

• Seismic Isolation
• Suspensions
• Basic R&D

Authors:

• Veronica Guerrero
• Edgard Bonilla
• Brett Shapiro
• Brian Lantz

Keywords:

Cryogenics nitrogen bubbles void fraction Newtonian noise

Referenced by: