Blochdocs (February 2024) ========================== .. note:: In January 2024 the receiver of the Carving manipulator on the A-endstation was rebuilt. It is now much sturdier and clamps more effectively, but **the ability to make extra electrical contacts to the sample at a specific azimuth is no longer possible.** See the 'Carving' pages for details. .. note:: The B-endstation currently runs on an LN2 flow cryostat. The repaired closed cycle helium cryostat is expected to be back in operation by April. Allowed EPU settings ------------------ ============== ============= ====================== ======================= Mode EPU Phase Allowed gap range (mm) Allowed hv range (eV) ============== ============= ====================== ======================= Horizontal 0 No restrictions >10 Vertical 42 >15 >14 Circular + 0 .. 42 >18\* >15 Circular - 0 .. -42 >18\* >15 ============== ============= ====================== ======================= \*Conservative estimate. To be verified. Maximum countrate (A-endstation) -------------------------------- Excessive countrates will damage the MCP in the detector assembly, and at BLOCH it is very easy to generate unsafe countrates. Respect the following rules: 1. Maximum 1 million counts *per second* if everything is in a narrow stripe (for example transmission mode or graphene's Dirac cone) 2. Maximum 10 million counts *per second* if intensity is evenly distributed across the detector 3. Core levels should be measured in an angular lens mode, except where lens table limits make this impossible. .. warning:: There is no background process in SES to monitor countrates, so you *must* verify that the countrate is safe while in voltage calibration mode. If you will perform an angle scan or photon energy scan, check the intensity over the whole scan range, not just your starting position. If you will measure in swept mode, ensure that the intensity slightly below your starting point is also safe. .. toctree:: :caption: For general users :hidden: beamline how_to_run_the_beamline samplemounting sourceports gettingData food basler_cameras dataanalysis .. toctree:: :caption: A-branch :hidden: loadlock prepmain prepsec gold ufo how_to_measure_A analyzerDA30 carving stinger_general alkali LEED sputtering pyrometer stm .. toctree:: :caption: B-branch :hidden: ..how_to_measure_B analyzerPhoibos how_to_analyze_spin .. toctree:: :caption: For beamline staff :hidden: staff/manuals staff/troubleshooting staff/neg staff/gaslines staff/localcontact staff/remoteaccess_staff staff/stingeroperational staff/motorhoming