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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 checmatic..." panel
    2. The image below shows a fully functional DPS system:
  3. Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
    Image of the strip shart          Image Added
  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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