Topics

All sessions are 3.5 hours

Session I. An introduction into vacuum system design (Dr. Oleg Malyshev, ASTeC, STFC Daresbury Laboratory) 

  • Basics of vacuum gas dynamics
  • Materials in vacuum
    - Vacuum “enclosures”
    - Real things in vacuum
    - Adsorption, absorption, desorption (thermally and particle bombardment induced), diffusion and permeation, sticking probabilities etc.
  • Throughput, pumping speed and vacuum conductance
  • Simple pump-down calculations
  • Examples

 

Session II. Materials for vacuum, connections, joints and sealing (Dr. Richard Pilkington, The University of Salford) 

  • Materials:
    - Metals, Ceramics, Glass, Other materials
  • Metal-metal
    - Welding: TIG, e-beam, laser, friction etc.
    - Brazing
    - Explosion bonding
  • Ceramic, Metal-ceramic joints
  • Glass
  • Types of vacuum seal (ISO, ConFlat, etc.)
  • Valves (What pumps and valves are best for rough, medium, high and extreme vacuum)


Session III. Vacuum gauges and RGAs (Dr. Keith Middleman, ASTeC, STFC Daresbury Laboratory) 

  • Which gauges are suitable for rough, medium, high and extreme vacuum
  • Common problems with gauges and RGA’s (eg. filament contamination)
  • Gas dependence of gauges – how this affects their accuracy
  • Calibration of gauges and RGA’s

 

Session IV. Vacuum pump operation and maintenance (Hugo Shiers, DLS with a contribution from Dr. Danny Sutherland, Agilent Technologies)

 (A)  Mechanical and kinetic

  • What pumps are best for rough, medium, high and extreme vacuum
  • Why carry out regular maintenance
  • Which pumps can be serviced easily and which ones require more specialist skills and equipment
  • Hints and tips on servicing and maintaining scroll, rotary, TMP  (with practical demonstration where possible)

(B)  Sputter ion and getter pumps: 

  • Sputter ion pump
    - principle
    - operation and maintenance
  • Getter pumps:
    - principle
    - installation
    - (re-)activation
    - lifetime

Session V. Cleaning, cleanliness and surface treatments (Dr. Keith Middleman, ASTeC, STFC Daresbury Laboratory) 

  • Basics – what are you trying to achieve – and why – what is clean
  • Options:
    - Aqueous, Solvent
    - CO2 snow, Bead blasting
    - Glow discharge
    - Vacuum firing
    - Ex-situ bakeout (prebaked vacuum chamber and component)
    - In-situ bakeout
  • Surface treatment:
    - Etching, Mechanical and chemical polishing
    - Coatings for low outgassing
    - Low SEY coating
    - NEG coating
    - Storage
  • What happens is no bakeout possible?

 

Session VI. Leak detection and how to fix vacuum leaks (Dr. Graham Rogers, Leybold Vacuum) 

  • How a vacuum leak detector works
  • How to carry out a leak test (hands on practical demonstration)
  • How to fix vacuum leaks


Session VII. Vacuum system design – practice project (Dr. Andrew Chew, Edwards Vacuum) 

  • What the system for? What Specification?
  • Initial consideration on vacuum system layout
  • Modelling
  • Conclusions (type of pumps, pumping speed of each, …


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