09678025 cites 16 patents.

A test apparatus for thermal energy measurement of disk-shaped test specimens has a cold mass assembly locatable within a sealable chamber with a guard vessel having a guard chamber to receive a liquid fluid and a bottom surface to contact a cold side of a test specimen, and a test vessel having a test chamber to receive a liquid fluid and encompassed on one side by a center portion of the bottom surface shared with the guard vessel. A lateral wall assembly of the test vessel is closed by a vessel top, the lateral wall assembly comprising an outer wall and an inner wall having opposing surfaces that define a thermal break including a condensable vapor pocket to inhibit heat transfer through the lateral wall from the guard vessel to the test vessel. A warm boundary temperature surface is in thermal communication with a lower surface of the test specimen.

Title
Guarded flat plate cryogenic test apparatus and calorimeter
Application Number
14/199768
Publication Number
9678025 (B1)
Application Date
March 6, 2014
Publication Date
June 13, 2017
Inventor
Wesley L Johnson
Titusville
FL, US
James E Fesmire
Titusville
FL, US
Agent
David E Franklin
Michelle L Ford
Assignee
The United States of America Represented by the Administrator of the National Aeronautics and Space Administration
DC, US
IPC
G01N 25/72
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