Automatic recording mcleod gauge.
Modified McLeod gauge which automatically records pressures
MCLEOD GAUGE↗
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Automatic recording McLeod gauge Patent
Automatic recording McLeod gage with three electrodes and solenoid valve connection
Faeth, P. A.↗
Bakeable McLeod gauge
A low pressure gauge of the McLeod type demonstrating superior performance and measuring characteristics is described. A mercury reservoir which is kept in a vacuum at all times as well as bakeable glass components to reduce contamination are featured.
Kreisman, W. S.↗
Baking enables McLeod gauge to measure in ultrahigh vacuum range
Accurate measurements in the ultrahigh vacuum range by a conventional McLeod gage requires degassing of the gage's glass walls. A closed system, in which mercury is forced into the gage by gravity alone, and in which the gage components are baked out for long periods, is used to achieve this degassing.
Kreisman, W. S.↗
Automatic recording mc leod gauge
Modified McLeod gauge for automatic pressure recording
MCLEOD GAUGE↗
Ion-molecule reaction rates in an oxygen- nitrogen atmosphere Final report
Photoionization mass spectrometer studies of ion-molecular reactions in oxygen-nitrogen atmosphere, and McLeod gauge measurements of ion source pressures
PHOTOIONIZATION↗
Applications of the Landau bootstrap
We advocate a strategy of bootstrapping Feynman integrals from just knowledge of their singular behavior. This approach is complementary to other bootstrap programs, which exploit nonperturbative constraints such as unitarity, or amplitude-level constraints such as gauge invariance. We begin by studying where a Feynman integral can become singular, and the behavior it exhibits near these singularities. We then characterize the space of functions that we expect the integral to evaluate to, in order to formulate an appropriate ansatz. Finally, we derive constraints on where each singularity can appear in this ansatz, and use information about the expansion of the integral around singular points in order to determine the value of all remaining free coefficients. Throughout, we highlight how constraints that have previously only been derived for integrals with generic masses can be extended to integrals involving particles of equal or vanishing mass. We illustrate the effectiveness of this approach by bootstrapping a number of examples, including the four-point double box with a massive internal loop. Published by the American Physical Society 2025
Hannesdottir, Holmfridur S. (ORCID:000000025440208↗