by Frank Moss, with inspiration from Ray Sierra's previous version.

Hopefully this will be a living document that evolves with MFX.

Future additions: Quick start guide and common problems/troubleshooting. For rare and complex problems, it is probably better to make a separate Confluence page.


  1. Depending on the experiment, don't forget to open up the Helium flow, if necessary. 
  2. Open important windows on mfxopr computer if they are not already open (many of them probably already are open).
    1. MFX Home (note that the numbers shown below are for reference in this document and will not appear when you open MFX Home)
      1. $ mfxhome

    2. CamViewer DG1, DG2, and DG3 YAGs
      1. $ camViewer -c mfx_dg1_yag -w 14 (-w flag sets the number of hours to wait before the camera times out)
        or $ camViewer -w 14 and choose mfx_dg1_yag from dropdown menu.



      2. Repeat for DG2 and DG3
    3. XRT M2 M1L4
      1. Click HOMS XRT M2 M1L4 in MFX Home (#1).



    4. DAQ
      1. $ restartdaq -w


        Jira tickets related to problems with DAQ config and L3T filter:
        1. ECS-5452 - Getting issue details... STATUS
        2. ECS-5461 - Getting issue details... STATUS
    5. FEE Spectrometer
      1. $ camViewer -c fee_spec -w 14
        or $ camViewer -w 14 and choose fee_spec from dropdown menu.
    6. Elog
      1. $ eloggrabber
        or click MFX Logbook Grabber in MFX Home (#2).

    7. Gas detector strip tool
      1. $ gas_detector_striptool



    8. IOC Manager
      1. Click IOC Manager in MFX Home (#3).



    9. Pulsepicker
      1. Click Pulse Picker on MFX Home (#4).



    10. Open important tools in new window from MFX Home.
      1. Click on beamline component. Mouse over, middle click, and click Open Display in New Window. Suggestions: Attenuators (#5), transfocator (#6). You may need more or fewer windows open depending on the experiment



  3. Prepare for beam. Insert DG1 and DG2 YAGs by clicking on the IPMs in MFX Home (#7, #8) and clicking on the YAG button. Make sure DG2 STP1 is inserted (XRT Common Vacuum window, click on any vacuum in MFX Home to open). Remove prefocusing lens and transfocators if they are in. Click on the flat, horizontal bar on a prefocusing or transfocator lens to move it out.

       



    Attenuate beam to 10%. Enter 1e-1 in the Desired Transmission Ratio box and hit enter. Click Use beside one of the Possible Transmission Ratios. Individual attenuators are moved in or out by clicking on them.



    Open slits to 2 mm.
    $ mfxslits 2
    or select each set of slits from MFX Home and change X and Y to 2 mm (#9, #10, #11, #12).

  4. Set the pitch of XRT M2H to the MFX angle (-611 µrad as of 5-13-21; 633 shortly after; 490 as of 6-28-21, -525 as of 1 24-22, -535 as of 4 30-22) Insert XRT M2H mirror. Click the "In" button. This step will take a while.

              

  5. Remove Stopper 4.5 if you have not already. Check for beam on DG1 YAG. It is helpful to average over ~5 frames in order to reduce beam jitter so that you can see the position of the beam better. If needed steer beam horizontally by changing the mirror pitch. Change by 0.1 – 1 µrad at a time. Decreasing the pitch moves the beam right on DG1 YAG.

        

  6. If needed, call ACR (2151) to move the beam vertically. Typically, the necessary vertical move will be 20 – 50 µm up.

  7. Put in appropriate pre-focusing lens (check elog for previous usage at similar energies) and check centering on DG1 YAG. Remove attenuators to increase beam flux to 100%.

           
  8. Make DG1 slits progressively smaller to 0.7 mm by clicking on the DG1 slits in MFX Home (#9) and changing the X and Y diameters. The beam should be centered in the slits. The crosshairs on the DG1 YAG screen should be at the corners of the slits. If slits are not symmetric or centered around the crosshairs, click on the slits in MFX Home (#9). Their X and Y positions should be 0. Click on the boxes containing their positions and hit enter. If this does not work, center slits by changing X and Y values. The slit motors can be sticky. A related Jira tickets to fixing the dg2 downsteam slits that got stuck can be found here: ECS-5453 - Getting issue details... STATUS



  9. Confirm that the DG2 YAG screen is inserted (see Step 2). Remove DG1 YAG (see Step 2). Check beam centering on DG2 YAG. Make the pre-DG2 slits progressively smaller to 0.7 mm (see Step 7). The beam should be centered in the slits. The crosshairs on the DG2 YAG screen should be at the corners of the slits. If slits are not symmetric or centered around the crosshairs, click on the pre-DG2 slits in MFX Home (#10, #11, #12). Their X and Y positions should be 0. Click on the boxes containing their positions and hit enter. If this does not work, center slits by changing X and Y values. The slit motors can be sticky.



  10. Block the beam by inserting the thickest attenuator or closing the pulse picker (F12). Click on the transfocator in MFX Home. Insert the appropriate combination of transfocator lenses for the current beam energy (find a combination that previously worked for a similar energy from the instrument elog or use Alex’s script when it is working again). Open the pulse picker and/or remove the thickest attenuator to open the beam path. On DG2 YAG, the beam should now have a smaller diameter and still be centered. If one of the prefocusing lenses appears to not be centered and concentric with the rest, try adjusting the X/Y position of the most powerful (last) transfocator lenses in the transfocator window in MFX Home (#6).



  11. Block the beam by putting in the thickest attenuator and closing the pulse picker. Put a YAG and inline camera at the interaction point as a diagnostic. Attenuate the beam to 1%. Open the pulse picker and look for the beam on the inline YAG camera. If you do not see the beam, slowly increase the flux by changing attenuator combinations. Once you see the beam, place crosshairs at opposite corners.



  12. Scan the transfocator in Z using Alex’s script, which calculates the diameter of the beam within the crosshairs as Z changes. There should be a minimum value for the beam diameter within the Z range of the transfocator. If there is not a minimum, consider changing the transfocator lens combination. Set the transfocator Z position to position with the minimum beam diameter in the transfocator window in MFX Home.
    1. $ /cds/home/b/batyuk/software/scripts
      Launch the focus_scan script using the real PV name of the desired camera.
      Example: $ focus_scan MFX:GIGE:05 --scan

  13. Align the detector (if necessary) and move to desired Z position. Check to see that the beam is visible on DG3 YAG.
    1. Rosenberg, Daniel J can you expand this section to include optimizing the midstream and downstream slits on dg3 yag.?


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