Page History

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•  This procedure assumes that
  •  the beamline is aligned up to yag3
  •  the slits are aligned to the beam
  •  the yag at TCC has been prealigned with the help of Questar 2 as well (for maximum accuracy) and the pin (the pin is used to measure the LPL spot size and set the plan of interaction)
•  

  Go to the yag at TCC

  Toggle Cloak

  Cloak
  pyRDarktrue

•  Remove the hutch Be CRL
•  

  Close slits 4 to 50 mic

  code

  Toggle Cloak

  language

  Cloak
  py	theme	RDark	linenumbers	true	op.slit4.move(0.05)

•  Set a cross on Questar 1 screen and write down the X and Y positions in the preset spreadsheet of the experiment
•  

  Close the pulse picker and reinsert the Be CRL

  Code Block
  language py theme RDark linenumbers true
  op.pp.close()

•  

  Move to the pinhole

  Code Block
  language py theme RDark linenumbers true
  op.pinhole()

•  

  Tweak the position of the pinhole until it is centered on the cross

  Code Block
  language py theme RDark linenumbers true
  x.hex_y.tweak(0.02) x.tgx.tweak(0.02)

•  

  Save the new pinhole position

  Code Block
  language py theme RDark linenumbers true
  op.pinhole_s()

•  

  Move back to the yag

  Code Block
  language py theme RDark linenumbers true
  op.yag()

•  Send the VISAR laser with event code 43 and enable the trigger
•  Confirm that the focus of the VISAR provides a sharp and round image on any VISAR cameras (Visar gige 1 and 2)
•  

  Tweak the focus of the visar position accordingly (50 mic steps is good enough)

  Code Block
  language py theme RDark linenumbers true
  op.visar_z.tweak(0.05)

•  Turn off the VISAR trigger
•  

  Prepare the system to check the front alignment of the drive lasers

  Code Block
  language py theme RDark linenumbers true
  op.check_front_alignment()

•  

  Check spatial overlap of the drive beams ABEF and GHIJ successively by centering the scattered signal on the cross of Questar 1 screen

  Code Block
  language py theme RDark linenumbers true
  op.TTL_shutter.Toggle("openABEF") op.TTL_shutter.Toggle("closeGHIJ") x.lpl_west_x.tweak(0.05) x.lpl_west_y.tweak(0.05) op.TTL_shutter.Toggle("closeABEF") op.TTL_shutter.Toggle("openGHIJ") x.lpl_east_x.tweak(0.05) x.lpl_east_y.tweak(0.05)

•  Record each positions of the VISAR and drive lenses in the experiment spreadsheet

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