Experimental hutch #2

  • Sample mounting should be done by the users with help from the staff.

  • Sample transfer is only done by beamline staff. The sample transfers have to be scheduled to be performed during normal working hours. No tranfers will be done at nights or during weekends unless someone of the staff is part of the experiment. Normally only one transfer should be planned for each 18 shifts experiment.

  • Unacceptable materials are essentially those which have an appreciable vapour pressure at 200 C and /or are likely to affect growth or structural studies of semiconductors and metals. They include: hydrocarbons, organic compounds, chalcogens, halides, mercury, gallium, antimony, arsenic... In addition corrosive gases as xilane, arsine etc. and radioactive materials are not accepted.

  • Evaporation . The thickness of the metal or semiconductor deposits evaporated from the cells has to be small in order to prevent contamination of the Be window and metallization of insulators. Typically a maximum of 10 atomic layers seems the resonable upper limit. Thin film synthesis (100 angstroms or more) are unacceptable.