Title

Analysis of Methods for Determining Outgassing Rates

Date

1964

Index Abstract

Coming Soon

Photo Quality

Not Needed

Report Number

AEDC TDR 64-180

Creator

Shipp, J. I.

Trolinger, J. D.

Corporate Author

ARO, Inc.

Extent

21

NTRL Accession Number

AD608660

Identifier

AD0608660

Distribution Classification

1

Contract

AF 40(600)-1000

DoD Project

6950

DoD Task

695003

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Abstract

Methods of determining outgassing rates of materials under vacuum are discussed with emphasis on the accuracy and limitations of each. Pressure measurement techniques included are rate of evacuation, rate of rise, and a number of conductance methods. Assuming Langmuir's model for sticking probability, it is shown that these techniques can introduce large errors in determinations of desorption rates due to incorrect choice of pumping speed. Instrument calibration procedures and comparisons of results employing different techniques are also given.

Report Availability

Full text available by request

Date Issued

1964-12

Publisher

Arnold Air Force Station, TN : Arnold Engineering Development Center, Air Force Systems Command, United States Air Force

Provenance

IIT

Type

report

Format

21 pages ; 28 cm.