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  1. Follow the gas jet how to page to get the gas jets ready: How to use gas jet
    1. Use the plot above to chose the max backing pressure and rep rate
  2. Ensure both US-DPS and DS-DPS pumps are running and operating as normal.  Also check VPIO:LI20:3164 to ensure the ion pump is on.
    1. Open the LI20 Vacuum panel, and then open the "DPS full checmaticschematic..." panel from the button near center of the page.
    2. The image below shows a fully functional DPS system:
  3. Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
             
  4. Fire the gas jet once and watch the strip chart.
    1. VGCC:LI20:3108:US4 should stay below 1e-9 Torr
    2. VGCC:LI20:3291:DS2 should stay below 1e-5 Torr
    3. VGCC:LI20:3073 should see minimal change and stay below 5e-8 Torr
  5. Fire the gas jet for a minute or so and watch the strip chart.
  6. If all continues to look good then you are good to fire at will.

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