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VacSim

VacSim. Vacuum Simulation on the PC. Or, How simulating your vacuum design can help you save time, money and build better vacuum systems. Technology Sources. A Cambridge based technology consultancy. We also develop & sell engineering simulation software. VacSim.

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VacSim

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  1. VacSim Vacuum Simulation on the PC Or, How simulating your vacuum design can help you save time, money and build better vacuum systems.

  2. Technology Sources A Cambridge based technology consultancy. We also develop & sell engineering simulation software. VacSim Easy to use PC software for simulating Vacuum systems. Three years old, new version just released. Developed by Technology Sources. Jim Taylor Engineering consultant with Technology Sources, and one of the developers of VacSim

  3. Vacuum Simulation • This talk will:- • Describe economic benefits of using a PC based vacuum simulation program. • Describe VacSim, a PC based simulator. • Give an example using VacSim • Persuade you to find out more!

  4. Question: • How many S/W engineers does it take to change a light bulb? • How many Vacuum engineers does it take to change a light bulb?

  5. Question: • How many S/W engineers does it take to change a light bulb? • How many Vacuum engineers does it take to change a light bulb? One. But he has to wait at least a day after switch on to tell you if it’s going to work.

  6. Vacuum Design Cycle Traditional Modern Design Design Using a simulator can help catch problems in the design stage, eliminating a build-test-redesign cycle. Build VacSim Test Modify Design Build Build 2 Test Test Deploy Deploy

  7. Simulation in Engineering

  8. For a product with £1m/yr sales 1 week delay in launch is £20,000 For £1m/yr process with 3 pump down cycles of 1 hour per day saving 5 minutes per cycle is worth £10,500 per year. Money Matters Simulation can save money In a 1-off system Replacing a pump can cost £5000 +

  9. Runs on PC with Windows 95/98/NT Schematic capture of Vacuum system Predicts how pressure varies with time Realistic systems - multiple pumps, multiple volumes, outgassing What Does VacSim Do?

  10. VacSim Applications • Scientific Instrument Design • Electron Beam Lithography Systems • Scanning Electron Microscope Design • Ion Implanter Design • University & • Government Research Labs • Beam Lines • Training Courses • Design UHV research systems • Vacuum Equipment Manufacturers • System Design • Sales Quotation • Manufacturing • Vacuum processing of materials

  11. Use Windows GUI Choose components from menu Join them together with mouse clicks Creating a Model

  12. Calculating Pressure Pressure (Torr) Total WaterAr Helium Hydrogen

  13. Pump Comparison 1 stage 8m^3/hr .v. 2 stage 18m^3/hr

  14. Models in VacSim CTI-Cryogenics

  15. Parameters that can be calculated Compute Pressure Throughput Pump speed Oil backstreaming Types of problem that can be addressed Pump down curves Up to air curves Effect of Bakeout regimes Effect of materials changes Effect of changing pumps VacSim Calculations

  16. By Pass Pipe Gun Chamber Ion Pump Valve Column Specimen Chamber Turbo Pump Roughing Pipe Rotary Pump Practical Example

  17. By Pass Pipe Gun Chamber Ion Pump Valve Column Specimen Chamber Turbo Pump Roughing Pipe Rotary Pump

  18. What-if Calculation Diffusion pump design costs less, but is slow - 10-6 torr working vacuum in 50 minutes With turbo pump cost is higher & pressure reaches 10-6 torr working vacuum in less than 5 minutes

  19. VacSim Single gas (air) £450 VacSim Multi Multiple Gases Extra models £650 VacSim Products Down Load free demo from WWW.SoftSim.Com See article in Jan/Feb edition of Vacuum-solutions at www.vacuum-solutions.com

  20. User Comments I purchased VacSim Multi from Technology Resources at the end of April. I was able to successfully use it for simulation of an accelerator cavity and associated vacuum system. I think it is a very good simulation tool... Raj Acharya, Los Alamos Nat. Lab. "We were a little unsure how accurate it would be. We worked it out longhand, then used the simulator, then ran a real system with a data logger. The results matched the simulator virtually dot per dot which gave us a large boost of confidence. Now we have 99.9% confidence in the models". Stan Sadler, Oxford Magnet Technology

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