BT pressure code Mathematica

Document #:

LIGO-E1800358-v1

Document type:

E - Engineering documents

Abstract:

This code solves the free molecular diffusion model like Rai W. used in btwaterleak, however the surface outgassing is simplified so the user can use the familiar rate/unit surface area/second. The beamtube can be broken up into sections, with user defined leaks, pump arraignments, etc. The code solves the coupled differential equations for each section. Result is steady-state pressure distribution for the given set of pumping and outgas (and leak) conditions.

Can calculate conductance if you set one end of the tube as a source and the other as a sink.

Files in Document:

• BT pressure distribution Mathematica notebook (kernal bt7.nb, 143.5 kB)

Topics:

• Vacuum

Authors:

• Jon Feicht

Keywords:

Vacuum beamtube pressure distribution