i
An improved analyzer for determining helium-4 in parts-per-billion range
[PDF-538.52 KB]
Details:
-
Personal Author:
-
Corporate Authors:
-
Description:"The Bureau of Mines has modified its parts-per-billion helium-4 analyzer to improve the analytical capabilities of the instrument. The modifications resulted in the following improvements: (1) the analytical precision of the instrument for 10 consecutive analyses was improved to +/-1 ppb at the 5,000-ppb helium-4 level, (2) the helium-4 sensitivity was increased almost tenfold, and (3) the minimum detectable limit for helium-4 was improved to 0.5 Ppb. The modifications made to improve the instrument included replacing the ion-source control circuit with a direct-current solid-state design, controlling the temperature of the ion source, stabilizing and reducing the pumping rate of the vacuum system, and optimizing peak integration." - NIOSHTIC-2 NIOSHTIC no. 10005040
-
Subject:
-
Document Type:
-
Collection(s):
-
Main Document Checksum:
-
File Type:
Supporting Files
-
No Additional Files
More +
You May Also Like
[PDF - 737.93 KB]
[PDF - 1.80 MB]
Email
CDC-INFO
