Infiltration of supermicron aerosols into a simulated space telescope

De-Ling Liu; Kenneth T. Luey

doi:10.1117/12.861130

7 September 2010 Infiltration of supermicron aerosols into a simulated space telescope

De-Ling Liu, Kenneth T. Luey

Proceedings Volume 7794, Optical System Contamination: Effects, Measurements, and Control 2010; 77940M (2010) https://doi.org/10.1117/12.861130
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

Purging is a common scheme to protect sensitive surfaces of payloads and spacecraft from airborne contaminant intrusion during ground assembly, integration, and launch vehicle encapsulation. However, the purge for space volumes must be occasionally interrupted. Thus it is important to gain insights into the transport of ambient particles penetrating through vent holes and entering the interior of a confined space system, such as a space telescope, during a purge outage. This study presents experimental work performed to measure time-dependent aerosol concentration changes during a purge outage. The laboratory results from the aerosol experiments were compared with a mass balance based mechanistic model which had been experimentally validated for aerosols ranging from 0.5 to 2 μm. The experimental data show that the steady-state aerosol concentration inside a simulated space telescope (SST) is governed by the surrounding particle concentration, SST air exchange rate, and the particle deposition rate.

Citation Download Citation

De-Ling Liu and Kenneth T. Luey "Infiltration of supermicron aerosols into a simulated space telescope", Proc. SPIE 7794, Optical System Contamination: Effects, Measurements, and Control 2010, 77940M (7 September 2010); https://doi.org/10.1117/12.861130

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available