The graph below shows how to calculate gas loads using the outgassing rate equation. Keep in mind that the value of the decay constant gives an indication of the material and outgassing mechanism. For example: α≈ 1.1-1.2 ultra-clean metal surfaces ...
The equation determines experimental conditions for the sensitive measurement of gas balance in the vacuum system. As for the evaluation of errors in the CM method, we have estimated the contributions of errors in the values of the variable conductance and in the pressure measurement. Another ...
In this model the outgassing rate is described as a function of time using the conservation of mass equation for gas molecules in the vacuum system. In order to solve this equation, it is essential to introduce an auxiliary equation which enables to determine the surface covarage as a function...
Calculation of the outgassing rate Calculate the outgassing rate, q (H2equivalent), using the equationq = (V/A) (dP/dt) [Pa m3sec−1m−2], where V is the volume of the sample chamber (m3) and A is the geometrical surface area of the chamber (m2). ...
Mushiaki, “Experimental study on the scaling law of the outgassing rate with a pumping parameter”, J. Vac. Sci. Technol. A 15(2), pp. 258–264 (1997). Article ADS Google Scholar K. Akaishi “Solution of the outgassing equation for the pump down of an unbaked vacuum system”, J...
Outgassing rateNEG coatingsParticle acceleratorsCollimatorsLHCIn this paper, we study two-component versions of the periodic Hunter–Saxton equation and its μ... M Kohlmann - 《Journal of Physics A Mathematical & Theoretical》 被引量: 54发表: 2011年 Impaired integration of audition and vision in...
Outgassing rate can be represented by the following empirical equation [11]:qout(t)=q1htα,where qout and q1h are the Theory – Fick’s law For a better understanding of the diffusive outgassing process, gas diffusion through solids is theoretically studied first. One-dimensional gas diffusion ...
The hydrogen outgassing rate is expressed as a boundary condition in the diffusion equation. For the UHV chamber the effect of surface treatment, such as baking and oxidation, and the benefits of a thin-walled chamber for reduction of outgassing rate are examined, and it is shown that the ...
depending on the mass eruption rate. Instead, a non-explosive solution is obtained when fragmentation is not achieved within the conduit, and these solutions may be interpreted as representing different styles of activity: from lava flows (where gas is able to decouple efficiently from the magma)...
depending on the mass eruption rate. Instead, a non-explosive solution is obtained when fragmentation is not achieved within the conduit, and these solutions may be interpreted as representing different styles of activity: from lava flows (where gas is able to decouple efficiently from the magma)...