Degasperi, F. T.Martins, M. N.Takahashi, J.Verardi, S. L L2014-05-272014-05-272005-12-01Proceedings of the IEEE Particle Accelerator Conference, v. 2005, p. 2422-2424.http://hdl.handle.net/11449/68538This work presents and describes in detail the pressure profile in a conical tube with the unavoidable steady-state outgassing, plus a transient gas source, like, for instance, in an accelerator, when particles from the beam hit the walls. Mathematical and physical formulations are given and detailed; specific conductance, specific throughput and a detailed discussion about the boundary conditions are presented. These concepts and approach are applied to usual realistic cases, such as conical tubes, with typical laboratory dimensions. © 2005 IEEE.2422-2424engBoundary conditionsDegassingThroughputConical tubePressure field distributionSteady-state outgassingParticle acceleratorsTrabalho apresentado em evento10.1109/PAC.2005.1591132WOS:000235745201308Acesso aberto2-s2.0-33847123633