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DoT

MFX Droplet on Tape (DOT) Operations Notes

MFX X-1001621
Last Revised: 08/18/2023
By: Victor Sosa Alfaro

Procedures

  1. Start up
  2. Align beam
  3. Setup DOT
# launch MFX home gui
mfxhome
# start the daq
restartdaq
# start camViewer session
camViewer -w 100
# launch python 3 session
mfx3
# bring up LFE home, should bring up current stable version (one in MFX home may not be current)
lfe
  • ePix100_1: go to idle, issue epix tripped temp is 16, dewpoint set to 20, reduce dewpoint # to 15 and try idling again, then turn on; helium flow was off
    • Humidity ~15% and 19% for epix_1 and epix_2 now, still tripping
    • Epix_1 down to ~10%
  • [camviewer - look at xcs_yag3m (farthest downstream on the mainline)
  • Pull up eloggrabber (LCLS tab in MFX Home)
  • MFX Home - middle click and open in new window to have certain things from MFX home in separate window, do that for attenuators
  • To re-enable F12 key: Restart gnome shell: alt + f2 and typing r in command window
    • [Terminal: gnome-settings.sh]
    • Moves in pulse picker, blocks beam
  • MFX Home > LCLS > HOMS overview: MR1L4 is MFX/MEC mirror
  • [python: tfs.find_best_combo(energy = 9800)] - does it work?
  • Transfocator has 9 different lenses, for a given energy, need particular combo of lenses
    • Look at MFX elog and find post at similar energy and use the lens settings
  • Timeout error starting daq
    • [Terminal: serverStat 172.21.24.123 cycle] to restart node (this node was the one in the error)
    • [Terminal: serverStat 172.21.24.123 status]
    • Once you can ssh into it, it should be good (takes several minutes to fully come back)
  • Edit Config in DAQ > EVR, should be 30 Hz
  • Rayonix have to connect directly to computer for it
    • [ssh -X hsuser\@con-ics-mfx-rayonix]
    • [killall procServ]
    • [capxure]
    • [cd ~/slac/]
    • [./startDaqInterface_newcraydl] start DAQ process that was killed with the killall command
  • DG2 STP 1 closed (delivers beam to CXI), will need to have it opened to see beam on xcs_yag3m
  • XRT Common Vacuum window
  • YAGs for MFX:
    • UM6 (upstream of mirror for hutch 6) (not sure what this is in camVieiwer)
    • MEC YAG0 (just after mirror)
    • XCS YAG3M (HFX DG3:PIM & IPM)
    • MFX_dia_yag (dia = diagnostics stand, right after MFX stopper, equivalent of SB at XCS)
      • Slowly
    • MFX_DG1_YAG
      • PIM DIA, IPM DIA
      • Beam moved vertical positive by 80 um 
    • MFX_DG2_YAG (usually brighter w/ lenses in because it's after transfocator)
    • MFX_DG3_YAG (after rayonix)
      • Take cover off rayonix, slowly bringing up beam making sure centered on detector (Rayonix window in AMI)
  • MFX Lens System (mfx home)
    • For 9.8 keV: 50, 125, 250 radius in position (TFS04, TFS06, TFS09)
  • EVR Trigger card (the physical card is between the beam pipes just before endstation):
    • MFXhome > Laser > ns laser EVR
    • We connected the camera to this card, set EVR to 42 (30 Hz)
  • Focus
    • LBL_inline camera, yag screen in place, 
    • Get focus right
    • Cross hair #1 somewhere top left of spot, cross hair #2 bottom right, defining ROI for integration
    • [Terminal: cd bin
    • [focus_scan --h] get help to see how it runs
    • [focus_scan {camera name} --scan] camera PV = MFX:GIGE:LBL:01 (does not take the alias)
      • [Terminal: camViewer -c LBL_Inline -m] bring up config window
  • Ref laser "in" position is 54 mm
  • Align von Hamos Fe Kα and Kβ crystals
    • Issues with alignment due to motor control connection/movement (encoder error), but was able to align Kα crystals
    • Could not algin the Kβ due to a lack of signal in the VH detectors (the chamber is not under He which reduces signal to noise)
  • Insert/move Rayonix into DOT chamber
    • Collect dark background ( issues with connections: rayonix damaging only in 3x3 mode with or without even sequencer. 4x4 works and 5x5 seemingly worked)

8/19/2023

  • XRT Spectrometer = FEE-SPEC0_H in DAQ
    • In XRT, gives single shot beam profile
    • Useful for crystallography to have shot-to-shot energy distribution for correct indexing of the Bragg peaks
  • Talking to Newport controller
    • Franklin Sample Delivery window in MFX Home
    • "Newport screen", try "Initialize All", Try "Reboot IOC" in top right of window
  • [Terminal: awr]: are we ready
    • Current photon energy getting read is (PV1 SIOC:SYS0:ML00:A0627) at 1032.66 eV
  • [capxsure]
    • Frame Trigger Mode: None
    • Exposure Type: Normal
    • Click Collect New Background
    • Change exposure type to Dark then collect new background
    • Then turn exposure type back to normal
    • [./startDaqInterface_newcraydl]
    • Restart DAQ
  • Checking mfx_dia_yag
    • Make sure s4.5 stopper open, pp open
    • Checking beam then on mfx_dg1_yag
    • Can walk down beamline on MFX home
    • Checking beam then on mfx_dg2_yag
    • Jaws ~0.7 mm open
  • Took off Rayonix cover to see beam on mfx_dg3_yag (post detector)
    • Slowly unattenuating
  • Bring in Rayonix into DOT chamber
    • Move in the z- directions initially position should be at 1100mm
    • Slowly move by 100mm steps until we get to 800mm then move by 50mm steps until we get to 250mm then smaller steps until we get to 188mm (final position)
    • *During movement always have clicker ready to stop incase an issues arises
  • Plan to run samples:
    • Fe(bpy)3 [10mM]
    • Ferri cyanide [9mM]
    • Ferro cyande [10mM]
  • To run samples:
    • initially bring in beam by removing stopper on door screen (Remove 43) and open pulse picker (PP)
    • Slowly unattenuating from [att(1e-6)] to 10% [att(1e-1)] then full beam [att(1)]
    • Make sure we are in 30hz sequencer for timing is proper [ mfx_timing.set30hz()]
    • Make sure pp is in flip-flop
    • On DAQ clip on record and start run
  • *If computer freezes just wait ~5-10mins until things get back to normal if this is not the case then call tech support.
  • To end shift:
    • remove Rayonix from 188mm to 1100mm (all at once no steps need unless they state it)
    • take full screen in eblogger and type [end of shift]
    • in terminal type [takepads]
    • copy e-milano message and inset uniname

8/20/2023

  • Visualize on first diagnostic yag
    • PIM DIA
  • Then visualize on DG1 yag
    • DG1 slit width is open 0.85 mm
  • Z Translation set to 120 mm for TFS
  • [python: att(1e-9)]
  • Taking pedastals is a way to get background [Samples for Co Kβ]{.ul}

CoCl2 run 122-126

A graph on a screen Description automatically generated

Reduced Cobaloxime run 127-131

A graph of a graph Description automatically generated with medium confidence

Oxidized Coblaloxime run 132-136

A graph of a number of red and blue lines Description automatically generated

We can compare the CoCl2 counts with the reduced cobaloxime.

8/23/2023

Hydrogenase samples:

Switched the crystals to Ni kα

Then able to run samples (prepared inside the glovebox)

Used commands to run:

To turn on PP and to start run.