Unofficial Menu for Operation of AGS IPM

The IPM now runs without any user intervention. It basically gets set up once and collects and logs data constantly. This means:

  1. The HV is to stay on at all times (40 kV)
  2. If only pol. protons is operating, then the leaks stay on all the time.
  3. The IPM correction coils and 60 vdc bias remain on at all times.
As long as the instrument conditions don't change, the backgrounds only need to be taken once. Reasons to take new backgrounds are:
  1. The timing is being changed (trigger count, spacing, integration period).{Note: in this case the program stops using the old background, and a new one must be taken.}
  2. Leaks have been changed (may not be needed, but not a bad idea).
  3. If the data is not looking very good, it can't hurt to take a new background.

To take a background, one must keep in mind that the system architecture is now different. We usually interact with the client application, called "agsIpm". This application does very little on its own, and is mostly a graphics interface to the manager. The manager can be stopped and started from "StartUp", under "Servers... Ags/Booster/Atr/NSRL Managers... agsIpmMan".

The following image shows the menu's for taking a background. The procedure is very simple.

  1. First turn off the beam and make sure the beam is off by seeing no profiles.
  2. It isn't needed to "zero" the backgrounds, but follow the menu's, as below, and select "Both". This doesn't cause any data to be acquired (that is happening all the time), but sets the current set of profiles in the manager to be the background.
  3. Turn the beam back on.

There are many ways to view the IPM data now. All the data you can see from the client application is being logged (including profiles). An addition, all the data is accessible from Gpm. So if you want a strip chart of emittance, that can be done most easily in a Gpm window.

(above was updated January 16, 2009. Everything below this line is still old stuff.)
Warning:

1. The HV set value should be 40 kV and the gas leak should be ~ 1200 for vertical and ~1000 for horizontal. The gasleak takes awhile (5-10 minutes) to be done as indicated by the pressure rise from 10^-9 to 10^-7. Be patient.

2. The gasleak will be shut off by tape sequencer but it is worthwhile to monitor it while mode switching happens.

(above is updated May-4, 2007. Everything below this line is still old stuff.)
New AGS IPM Documentation (controls wiki)

To start it up

  1. Open Agsipm from StartUp/AGS Applications/Agsipm. The integration time should be less than 50ms. The settle time should be set less than 20ms. When first open the program, it is quite often the default settle time is negative number which should be corrected to less than 20ms. A good profile should have peak counts slightly below 1000.
  2. There is a timer to shut off IPM HV and gas leak every 30 minutes. This is a protection feature for ion run. To set gas leak and HV values, open pet page at pet/AGS/instrumentation/ipm. The key parameters on this pet page:AGN.C05_IPMH_LEAK (Setpt~1800, C1 ON); AGN.E15_IPMV_LEAK (Setpt~1000, C1 ON); AGN.IPM_HV (Setpt<=2000, C1 ON); ARI.IPM_CLOCK (C1 ON, C2 filed should NEG).

    Here is an example of the pet page setting.



    Troubleshooting

    Sometimes the pet page does not response to the setpt change or the Agsipm application shows no update on profile, that is indication that the controller need reboot. Following page shows the controller name.


    Mainteined by Haixin Huang