Vacuum Simulation on the PC Or How simulating

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

A Cambridge based technology consultancy. We also develop & sell engineering simulation software. 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 Vac. Sim www. softsim. com

Vacuum Simulation • This talk will: – Describe economic benefits of using a PC based vacuum simulation program. – Describe Vac. Sim, a PC based simulator. – Give an example using Vac. Sim – Persuade you to find out more! www. softsim. com

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? www. softsim. com

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. www. softsim. com

Vacuum Design Cycle Traditional Design Modern Design Build Test Modify Design Build 2 Test Using a simulator can help catch problems in the design stage, eliminating a build-test-redesign cycle. Deplo y www. softsim. com

Simulation in Engineering www. softsim. com

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

What Does Vac. Sim Do? – 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 www. softsim. com

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

Creating a Model – Use Windows GUI – Choose components from menu – Join them together with mouse clicks www. softsim. com

Calculating Pressure (Torr) Total Water Ar Helium Hydrogen www. softsim. com

Pump Comparison 1 stage 8 m^3/hr. v. 2 stage 18 m^3/hr www. softsim. com

Models in Vac. Sim CTI-Cryogenics www. softsim. com

Vac. Sim Calculations • 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 www. softsim. com

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

By Pass Pipe Gun Chamber Valve Ion Pump Column Specimen Chamber Turbo Pump Rotary Pump Roughing Pipe www. softsim. com

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 www. softsim. com

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

User Comments I purchased Vac. Sim 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. . . Stan Sadler, Oxford Magnet Technology 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". www. softsim. com