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Documentation of procedures

The intention of this section is to enable new beamline staff or trainees as quickly as possible to work autonomously at/with the beamline. Non-routine tasks.

before starting the first time!!!!!

Put in filters and observe the beam for the first time. -> adjustment of the beam for the experiment.

after shutdown

  • do search of the optics hutch
  • are all chillers and other devices turned on (e.g. the chiller of the monochromator), are all symbols in the dashboad green? If everything seems ok click reset to refresh them and see if the shutters can be opened.
  • open the gauge valves
  • check with Yazeed if any motors need to be homed, especially if there was a power cut
  • experimental hutch: CVD Window 2: water flow for cooling should be >= 3.5, below 3 it gives an interlock

Changing cameras

open small screws, disconnect and store or mount in a save place the detached camera

Selecting detector, start of IOC, getting initial images

FLIR needs to be plugged in the power outlet PCO needs to be switched on on top, its chiller is in "follow-mode".

Refining slit settings and detector position

slits 1, 2, 3 need to be adapted to fit the FOV

Potential obstacles

could be that wire scanner, diagnostics screen, white beam blocker (WBB), CVD window are "in the beam" and give artefacts

writer server, tomoscan IOC, and python server need to be restarted from time to time (if they start becoming non-responsive); sometimes it also happens after aborting a scan

At very high energies, owing to total external reflection in the monochromator's layers, filtering of the incoming white beam might be necessary to obtain meaningful data

Change radiation and energy settings

The beamline energy can be changed using the Energy CLI.

Start the Energy CLI:

cd /home/control/energy/iocBoot/iocEnergy_2BM
python3 -i start_energy.py

Set energy to 20.0 keV (W/B4C stripe):

energy set --energy 20

Set energy to 20.0 keV (Ru/B4C stripe):

energy set --energy 19.99

--- maybe list more settings + filtered radiation? ---- orange suite

changing detectors

Videos + photos

-> increase distance between sample and detector to e.g. 1m -> remove the camera -> open screws on the sides -> slide detector down (get help if it is too heavy for you alone)

Det1/Det3 - optique peter:

remove lead box untighten small crews place the camera in a safe place (e.g. a hanging, CLEAN bag) connections

Det3 (poly radiation): connect all five available cables Det3 (mono radiation with objectives): connect Foc1/Rot1

Det2 - Hasselblad:
open black housing (heavy, perhaps use the crane)

changing optics/magnification

Videos + photos

cleaning the scintillator

Videos + photos

Mount proposal folders

Warning

The following commands are for the beamline staff only.

Mount proposal ExpData and recon folders on BL-BEATS-WS01:

cd ~
./petra_prop_mounter.sh

Check mount points:

df -h

Unmount proposal folders:

umount /PETRA/SED/BEATS/SEM_6/20235010
umount /PETRA/SED/BEATS/SEM_6_recon/20235010

Mount proposal ExpData and recon folders on Win Data Dispenser and Dragonfly VizServer:

./petra_prop_recon_smb_mounter.sh

Note

For proposals belonging to a different semester the scripts petra_prop_mounter.sh and petra_prop_recon_smb_mounter.sh must be modified.

Endstation alignment

.. toctree::
   :maxdepth: 2

   Tomoalign - pitch, focus, camera rotation <tomoalign>

   Additional (can be deleted after final checks) :ref:`sample alignment<sample alignment>`