If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    ASTM E2311 - 04(2021)

    Standard Practice for QCM Measurement of Spacecraft Molecular Contamination in Space

    Active Standard ASTM E2311 | Developed by Subcommittee: E21.05

    Book of Standards Volume: 15.03

      Format Pages Price  
    PDF 22 $75.00   ADD TO CART
    Hardcopy (shipping and handling) 22 $75.00   ADD TO CART

    Significance and Use

    5.1 Spacecraft have consistently had the problem of contamination of thermal control surfaces from line-of-sight warm surfaces on the vehicle, outgassing of materials and subsequent condensation on critical surfaces, such as solar arrays, moving mechanical assemblies, cryogenic insulation schemes, and electrical contacts, control jet effects, and other forms of expelling molecules in a vapor stream. To this has been added the need to protect optical components, either at ambient or cryogenic temperatures, from the minutest deposition of contaminants because of their absorptance, reflectance or scattering characteristics. Much progress has been accomplished in this area, such as the careful testing of each material for outgassing characteristics before the material is used on the spacecraft (following Test Methods E595 and E1559), but measurement and control of critical surfaces during spaceflight still can aid in the determination of location and behavior of outgassing materials.

    1. Scope

    1.1 This practice provides guidance for making decisions concerning the use of a quartz crystal microbalance (QCM) and a thermoelectrically cooled quartz crystal microbalance (TQCM) in space where contamination problems on spacecraft are likely to exist. Careful adherence to this document should ensure adequate measurement of condensation of molecular constituents that are commonly termed “contamination” on spacecraft surfaces.

    1.2 A corollary purpose is to provide choices among the flight-qualified QCMs now existing to meet specific needs.

    1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E595 Test Method for Total Mass Loss and Collected Volatile Condensable Materials from Outgassing in a Vacuum Environment

    E1559 Test Method for Contamination Outgassing Characteristics of Spacecraft Materials

    ICS Code

    ICS Number Code 71.040.99 (Other standards related to analytical chemistry)

    UNSPSC Code

    UNSPSC Code 25150000(Spacecraft)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/E2311-04R21

    Citation Format

    ASTM E2311-04(2021), Standard Practice for QCM Measurement of Spacecraft Molecular Contamination in Space, ASTM International, West Conshohocken, PA, 2021, www.astm.org

    Back to Top