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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. Image here
  3. Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
    1. Park the beam on TD11
    2. Insert VVPG:LI20:3160 and VVPG:LI20:VV3250
    3. Increase the setpoints on the VV:3250 interlocks on gauges 3291:DS2 and 3249
      1. Select each gauge, then select the "More..." button beside Status in the "Interlock Output Pressure Status" and increase to 1e-3 on each gauge.
      2. Remember to set this back at the end of the shift!Image of the strip shart
    4. Fire the gas jet once and watch the strip chart. If the 3108 and 3291 pressures say below ~1e
      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 looks good, then stop the gas jets and open the beamline valvesFire the gas jets and watch CC3073 pressure. If there is no change, continues to look good then you are good to fire at will.

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