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Storage ring vacuum system pressure modelling at Diamond

DOI: 10.1016/j.vacuum.2009.04.029 DOI Help

Authors: Matthew Cox (Diamond Light Source) , Brian Macdonald (Diamond Light Source) , Stephen Bryan (Diamond Light Source) , Hugo Shiers (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: 12th Joint Vacuum Conference (JVC-12)
Peer Reviewed: Yes

State: Published (Approved)
Published: April 2009

Abstract: Two complementary vacuum system simulation programs, “MCTPVac” and “Pressure Profile”, have been developed and tested at Diamond and used to model sections of the Diamond storage ring. The MCTPVac program implements the Monte Carlo Test Particle (MCTP) method in 3 dimensions. The Pressure Profile program uses a 1-dimensional method based on a steady-state diffusion equation. The validity of the MCTPVac program is confirmed by comparison with previously-published results and formulae for simple geometries. The pressure predictions made by the two methods for the Diamond storage ring injection straight are then compared with each other and to actual observed pressures.

Journal Keywords: UHV; Synchrotron; Diamond Light Source; Monte Carlo Test Particle; Vacuum; Simulation; Molecular flow

Subject Areas: Physics


Technical Areas: Vacuum