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DO NOT FOLLOW THIS PAGE! - Go here instead: How to use the gas jets!

Updated for all DPS pumps being installed, but no apertures except for the holey upstream window.

Gas jet max rep rate (updated 7/15/2022):

THIS IS NOT CORRECT. NEED TO REPLACE WITH NEW DATA WITH NEW GAS JET WIDTH

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H2 gas - http://physics-elog.slac.stanford.edu/facetelog/show.jsp?dir=/2022/28/12.07&pos=2022-07-12T22:12:49

He gas -

DO NOT FOLLOW THIS PAGE! - Go here instead: How to use the gas jets!

How to set up DPS:

1. Follow the gas jet how to page to get the gas jets ready: OBSOLETE - 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 schematic..." panel from the button near center of the page.
   2. The image below shows a fully functional DPS system:
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3. Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
   
4. Park the beam on TD11
5. Insert VVPG:LI20:3160 and VVPG:LI20:VV3250
6. 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!
7.           Image Added
8. 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
   Fire the gas jet once and watch the strip chart. If the 3108 and 3291 pressures say below ~1e-5
   1. Torr
9. Fire the gas jet for a minute or so and watch the strip chart.
10. 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.

Things to watch for:

1. If the lone cold cathode gauges shut themselves off, then turn them back on. If pressure reads above 1e-3 Torr then turn it back off.
2. If a CC gauges on 3171 or 3259 are cycling on and off, then force them to stay off (or on if it is in a safe pressure zone)
   1. Change the control mode to Off, then turn CC HV off.
3. Watch the PB and oven turbo temperatures
4. Watch CC3073 to see if it ever changes.
5. Watch if the DPS foreline valves trip in and the turbos shut off. If this happens DO NOT TRY TO FIX unless you are Doug, or Christine, or Ryan.

How to stop everything at the end:

1. Stop firing the jets and follow OBSOLETE - How to use gas jet to shutdown and depressurize the gas jet system.
2. Remove any changes to interlocks that you made.
3. Reset any cold cathode gauge "control modes" that were changed back to auto.
4. Call ACR and tell them everything has been reset.

In case of catastrophe:

You can always make art

Image Added