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THESE PROCEDURES ARE UNDER DEVELOPMENT AND NOT YET COMPLETED. DO NOT TRUST THEM, USE YOUR COMMON SENSE!

[edit] EPICS Graphical Interface

ISAC1 Commissioning Window, about to select '8 pi' from the 'Vacuum 1' drop-down menu

All controls are performed through the EPICS interface, which displays on any X-type display terminal (Linux, or Cygwin after startx).

• ssh -X 8pi@isacepics1 (or use -Y on Cygwin)
• The ISAC1 Commissioning Menu will appear. Click on the Vacuum 1 button. A small popup window will appear. Select 8 pi, as shown.

Typical 8pi vacuum window. Target chamber has been vented and is at atmosphere.

• The 8pi Vacuum page will now appear. This page allows you to control the vacuum.
  • Real physical devices are represented on the EPICS page by an icon of some sort. Typically, there will also be a black box with grey lettering with the EPICS name of the device. Clicking on the black box will bring up a control window that provides more information and actions.
  • Often the main page will also have grey 1 and 0 buttons that can be used to turn devices on or off, and a blue readback value. This provides a shortcut so you don't have to pull up the control window for a specific device every time you want to do something with it.
  • Device icons are colored black for off, bright green for on, yellow for interlocked, and red for malfunctioned. Some devices will appear dark green with white outlines while they are transitioning between on and off.
  • Valves are normally closed, and a valve that is "off" is closed. That is, closed valves are off, and open valves are on. Interlocked valves are (usually) closed. Malfunctioned valves can be in an indeterminate state.
• You can also use the " Utilities" button to o the Commissioning Menu window to start a Striptool.

[edit] Pumping Down The Full Chamber

• First make sure everything is "buttoned up". It is recommended that the o-ring be removed and cleaned with alcohol before closing up.
• The page should closely resemble the "Typical" window shown above. In particular, make sure that the roughing and backing pump ILE1A:BP9, the backing pump main valve ILE1A:CG9B, and the backing vacuum guage ILE1A:PV9 are all green as shown.
  • Do not be concerned that ILE1A:VV9A is interlocked, it will not play any part in the procedure.
• Close the constricted vent valve ILE1A:VV9 by clicking the 0 button underneath its name.
• Open the roughing valve ILE1A:RV9 by clicking the 1 button underneath its name.
• The pressure on ILE1A:CG9 and ILE1A:CG10 should fall rapidly (a few Torr/s) at first. If this is not the case then the hand-valve located next to the ILE1A:RV9 valve is likely closed. Go open it.
• Do not be concerned that ILE1A:RV10 is interlocked and closed. Roughing is done through either ILE1A:RV9 or ILE1A:RV10, not both. Use ILE1A:RV9.
• The turbo pumps ILE1A:TP9 and ILE1A:TP10 are interlocked so that they can only be turned on when the vacuum in the 8pi chamber (i.e.,ILE1A:CG9 and ILE1A:CG10) are below a certain pressure. This can take up to an hour. Wait until ILE1A:RV9 closes automatically at 99 mTorr.
• Note that once ILE1A:RV9 closes the system will begin to slowly vent back up to atmosphere. If the pressure gets too high before the turbos are switched on then open ILE1A:RV9 again to get back down to 100mTorr again.
• 'Its a really bad idea to start the turbos before the valve automatically closes ie. above 100mtorr in the chamber. This dramatically raises the pressure in the backing line as the turbos start, which the system takes a long time to recover from, and results in a MUCH SLOWER overall pump down time.'

Open all four windows so that the valves can be opened and turbo pumps can be started in quick sucession

• The two valves must be opened and the two turbo pumps must be started in rapid succession, for this to happen open and arrange all four windows together on the screen. To do this click on each device name in the black box to bring up its control panel.
• Reset and Open ILE1A:BV9.
• Reset and Turn on ILE1A:TP9. The turbo will begin to spin, as indicated by turning dark green with white outlines. After a few seconds, the pressure in the target chambers should begin to drop and the pressure in the backing line should briefly rise.
• Reset and Open ILE1A:BV10.
• Reset and Turn on ILE1A:TP10. The turbo will begin to spin, as indicated by turning dark green with white outlines. After a few seconds, the pressure in the target chambers should begin to drop and the pressure in the backing line should briefly rise.
• After a few minutes, when the turbo pumps are at full speed, the turbos will turn bright green. Be patient, the 1000 litre ILE1A:TP9 can take quite a long time to spin up.
• Turn on ILE1A:PNG9
• When ILE1A:PNG9 is reading a sensible vacuum value <2e-6torr, you may call the ISAC operators and ask them to open ILE1A:IV8. This may help pump the beamline faster. More importantly, it is necessary to deliver beam. This opens the chamber to the beamline. It is recommended to wait until the vacuum is "good" which will take several hours.

[edit] Pumping Down Just the Faraday Cup

• First make sure everything is "buttoned up".
• The page should closely resemble the "Typical" window shown above. In particular, make sure that the roughing and backing pump ILE1A:BP9, the backing pump main valve ILE1A:CG9B, and the backing vacuum guage ILE1A:PV9 are all green as shown.
  • Do not be concerned that ILE1A:VV9A is interlocked, it will not play any part in the procedure.
• Close the constricted vent valve ILE1A:VV9 by clicking the 0 button underneath its name.
• Open the roughing valve ILE1A:RV9 by clicking the 1 button underneath its name.
• The pressure on ILE1A:CG9 should fall rapidly (a few Torr/s) at first. If this is not the case then the hand-valve located next to the ILE1A:RV9 valve is likely closed. Go open it.
• The turbo pump ILE1A:TP9 is interlocked so that it can only be turned on when the vacuum in the 8pi chamber (i.e.,ILE1A:CG9) is below a certain pressure. This can take up to half an hour. Wait until ILE1A:RV9 closes automatically at 100 mTorr.
• Note that once ILE1A:RV9 closes the system will begin to slowly vent back up to atmosphere. If the pressure gets too high before the turbo is switched on then open ILE1A:RV9 again to get back down to 100mTorr again.
• Reset and Open ILE1A:BV9.
• Reset and Turn on ILE1A:TP9. The turbo will begin to spin, as indicated by turning dark green with white outlines. After a few seconds, the pressure in the target chambers should begin to drop and the pressure in the backing line should briefly rise.
• After a few minutes, when the turbo pump is at full speed, the turbo will turn bright green. Be patient, the 1000 litre ILE1A:TP9 can take quite a long time to spin up.
• Turn on ILE1A:PNG9
• When ILE1A:PNG9 is reading a sensible vacuum value <2e-6torr, you may call the ISAC operators and ask them to open ILE1A:IV8. This may help pump the beamline faster. More importantly, it is necessary to deliver beam. This opens the chamber to the beamline. It is recommended to wait until the vacuum is "good" which will take several hours.

[edit] Venting

• Call the ISAC Operators and request that ILE1A:IV8 be closed. Inform them that you are venting the 8pi chamber.
• Check that SCEPTAR High Voltages are off.
• Check that the zero-degree scintillator High Voltage is off.
• Check that PACES High Voltage is off, Preamp power is off, and PACES has had sufficient time to warm up to room temperature.
• Switch off both turbo pumps, ILE1A:TP9 and ILE1A:TP10, by clicking the 0 button underneath the name.
• Wait for the standard 10 minutes for the turbos to spin down in line with ISAC Operation procedures.
• Check that: ILE1A:PNG9 and ILE1A:PNG10 are turned off (interlocked with turbo pump).
• Check that: ILE1A:BV9 and ILE1A:BV10 are closed (interlocked with turbo pump).
  • Note: As these steps are followed, some devices may turn yellow, indicating that they are interlocked. This is normal.
• Connect up a supply of dry nitrogen to the inlet valve of ILE1A:VV9.
• Open the constricted vent valve ILE1A:VV9 by clicking the 1 button underneath its name. Make sure it is ILE1A:VV9 that you are opening and not ILE1A:VV9A.
• The pressure recorded by ILE1A:CG9 will begin to increase by a few torr/second. If it does not continue to increase then check the manual valve located next to ILE1A:VV9 where the nitrogen line was hooked up.
• Venting to atmosphere takes about 10 to 20 minutes.
• Swipes will probably be required on opening the chamber. Call someone on the group contacts page with a respirator icon next to their name for further instructions.
• Be careful that the o-ring is not allowed to drop to the ground when the chamber is opened.