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- W2549543587 abstract "Numerous reports on gas loading of hydrogen isotope into powdered materials indicate excess heat generation that could be the result of a low energy nuclear reaction (LENR). When the amount of generated heat is small, it is important to characterize the calorimeter to account for possible measurement errors, or artifacts, which can result in long-term apparent excess heat. In this paper we investigate one of those possible measurement artifacts applicable to the gas loading systems that (1) use thermometry as a proxy for energy flow measurements, and (2) run at elevated temperatures. When loading gas into Pd-impregnated alumina, we have found that thermal gradients inside the system result in apparent heating or cooling of the measuring system. We experimentally magnified this effect and confirmed that it was due to temperature nonuniformity inside the calorimetric system. We quantified the effect using a numerical simulation tool to show that a temperature gradient as small as 0.5 K/m might result in 50 mW of apparent excess heat “generation”. We suggest a simple approach for investigators to account for this measurement artifact by calibrating their systems with helium gas either prior to, or at the end of, the experimental sequence. © 2014 ISCMNS. All rights reserved. ISSN 2227-3123" @default.
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- W2549543587 date "2014-01-01" @default.
- W2549543587 modified "2023-10-12" @default.
- W2549543587 title "Measurement Artifacts in Gas-loading Experiments" @default.
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- W2549543587 hasPublicationYear "2014" @default.
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