Short Course atInternational Vacuum Congress
10-11 September, 2022
https://ivc22.org
Title: Vacuum Gas Dynamics: Theory, Experiments and Applications
Lecturers: Prof. Felix Sharipov, Federal University of Parana, Brazil
Prof. Irina Graur, Aix-Marseille University, France
Dr. Oleg Malyshev, Daresbury Laboratory, UK
Dr. Roberto Kersevan, CERN, Switzerland
Aims and motivations: The course is addressed to students, scientists and engineers whoare not experts in Rarefied Gas Dynamics but who deals with this field in their routine work.
The available textbook and handbooks on vacuum technology usually give just fundaments ofgas dynamics but not deep enough to understand the modern state of analytical and numericalmethods of modelling in this field. The special literature is often too hard for non-experts. This
short course targets at basic research training in Vacuum Gas Dynamics and provides acoherent and rigorous introduction into this field including relevant theoretical andexperimental methods for practical applications. No preceding knowledge of gas dynamics isassumed.
Structure of the course: The course duration is 12 hours (2 days).
• “Theory and simulations”, 6 hours, given by Prof. Felix Sharipov and Prof. Irina Graur• “Practical Applications”, 6 hours, by Dr. Oleg Malyshev and Dr. Roberto Kersevan
Topics:•Theory: Molecular free path, gas rarefaction and flow regimes. Velocity distributionfunction. Gas-surface interaction. Accommodation coefficients. Free-molecular flows.
Analytical solutions in the free-molecular limit. Test particle Monte Carlo method.
Velocity slip and temperature jump conditions. Analytical solutions of the Navier-Stokes
equations subject to the slip and jump conditions. Intermolecular interaction and kineticequation. Flows in the transition regime. Discrete velocity method. Direct simulation
Monte Carlo method. Main numerical solutions in the transitional regime with examplesof their applications: Poiseuille flow, Coutte flow, heat transfer. Transient flows.
Numerical models of Holweck and turbo-molecular pumps. Numerical model of Pirani
sensor. Rarefied flow calculator. Modelling of gas dynamics processes in vacuum
chambers.
•Applications: Design of large UHV vacuum systems in free molecular flow regime.
Vacuum specification and input parameters. Experimental data: measurements, dataanalysis, extrapolation and using. Models: overview of different models used with anemphasis on 1D diffusion analytical model and numerical models (test particle Monte
Carlo and angular coefficients), pumps and sources of gas in different models. From amodel to a mechanical design. Analysis of errors and uncertainties in a final design.
Examples of design.
Didactic material: The participants will get hard and electronic copies of presentations andnumerical codes to solve basic problems of vacuum gas dynamics.

Information about the lecturers:
Prof. Felix Sharipov graduated from the Moscow University ofPhysics and Technology, Faculty of Aerophysics and Space Researchin 1982. He obtained his Ph.D. in 1987 at the Ural State Technical
University. In 1988 he joined the Physics Faculty of the Ural State
University where he set up his activity in rarefied gas dynamics. In 1992
he moved to the Federal University of Parana in Brazil where he built
up a group on numerical modelling of gas flows in microscale. His
research interests are numerical methods of rarefied gas dynamics applied to microfludics,
vacuum technology and aerothermodynamics. His group develops both probabilistic anddeterministic approaches. He was an organizer of numerous vacuum gas dynamics
meetings and schools. F. Sharipov published over a hundred journal articles, several
reviews and chapters in handbooks. He is an author of two books and a member ofeditorial board of “Vacuum” (Elsevier).
Prof. Irina Graur obtained M.Sc. in applied mathematics in 1984 from
Moscow Lomonossov State University. She received a PhD also from
Moscow State University in 1989 and the Habilitation from Provence
University in France in 2008. Irina Graur was associate professor at
Keldish Institute of Applied Mathematics between 1984 and 2000. She iscurrently professor at Aix Marseille University in France. She has madea number of contributions in the field of rarefied gases for the aerospaceresearch. Her current research interests include the experimental andnumerical characterization of the gas properties at micro and nano scales. She heads theresearch group “Non-equilibrium phenomena and microfluidic” in IUSTI Laboratory. She
participated in the organization of a number of international conferences, workshops andsummer schools. She has co-authored more than one hundred journal articles andconference papers.
Dr. Oleg Malyshev was graduated in the Physics Department at theNovosibirsk State University in1989. He started his carrier as avacuum scientist at the Budker Institute of Nuclear Physics where heobtained his Ph.D. in 1995. His work includes theoretical studies,
experimental research and design of various vacuum systems suchas VEPP-5, ANKA, BESSY, SSC. From 1998 to 2001, he worked at
CERN designing the LHC beam vacuum system. Since 2001 heworks in ASTeC at STFC Daresbury Laboratory, he designed avacuum system for Diamond Light Source, participated in R&D for International LinearCollider, FAIR, KATRIN, NLS, ALICE, etc. He leads experimental and analytical study inASTeC Vacuum Science Group. He is an editor of international scientific journal VACUUM(Elsevier), an organizer of international workshops, meetings, an author of more than 160
scientific papers and reports. He is a Charted Physicist and a Fellow of Institute of Physics.

Roberto Kersevan graduated in physics at the University of Trieste,Italy, in 1985. After initial work on the design of the ELETTRA lightsource from 1988 to 1992, he moved to the SSC Laboratory in Dallas,for the design of the storage rings’ cryogenic vacuum system. He
then moved to Wilson Lab. of Nuclear Studies, Cornell University, towork on the upgrade of the vacuum system of the e-e+ collider CESR.
In 1997 he took up the position of head of the vacuum group at theESRF in Grenoble, France, where he remained until 2009. In 2004
he took a one-year sabbatical leave to work on the installation of the cryomodules of thelinac of the SNS, ORNL laboratory, Oak Ridge, USA. Between 2009 and 2011 he worked
at the ITER thermonuclear fusion project, Cadarache, France, in the vacuum pumping
group. He then joined the Vacuum Surfaces and Coatings group at CERN, where he is
now Senior Applied Physicist. He is mostly known for the development of the ray-tracing
montecarlo codes Molflow+ and SYNRAD+, the latter being used for synchrotron radiation
studies. He was the original developer of non-evaporable getter vacuum chambers on lightsources since the year 1999. He has been and still is member of the machine advisorycommittee of 7 light sources, and reviewer for other accelerator projects.

Experimental characterization of the gas-surface interaction.
Relations between theoretical and experimental approaches. Experimental data analysis.