The main rules for performing remote measurements at the SOLARIS facility
- Before each series of remote measurements, the User is obliged to contact of the end station supervisor (local contact) in order to verify and define the scope of the performed studies and to establish a measurement schedule, including support hours (on site and remotely) with the local contact.
- During remote measurements, the User receives a login and password to remotely log in remotely to the workstation, which will be used to conduct the experiment and / or initial data processing, depending on the end station. At the same time, it will be possible to download the experimental data to your local disk.
- The method of mounting samples to carriers must be agreed with the local contact well in advance. The pumping out in the load lock, transfer of the carriers to the measurement chamber is performed by an employee of the Solaris facility. Support for this scope is possible during the working hours of the end station supervisors.
- The study at cryogenic and elevated temperatures are time consuming and require the interim or permanent presence of a person near the experimental station. For this reason, they must be consulted with the local contact before starting the experiment in order to be able to enter them into the measurement plan.
The detailed rules and support for performing remote measurements at different end stations at the SOLARIS facility
The PEEM end station
- During the measurements, the User receives a login and password enabling remote access to the workstation. The workstation enables the control of the experimental results collected on an ongoing basis by the microscope operator. At the same time, the User receives access to all applications installed on the workstation that enable data pre-processing.
- The assembly of samples on holders along with the transfer to the measurement chamber is performed by local contact. User support is possible for a maximum of 16 hours, i.e. two shifts (between 8:00 and 24:00 local time GMT + 1). During this time, the User can ask to change the sample position, rotate, change samples in the main chamber, correct the aperture settings (contrast aperture, slit in the analyzer). All these elements are operated manually, therefore access to them is controlled by a person sitting directly at the microscope.
- During remote measurements, the User should be in constant contact with the microscope operator in order to control the microscope operating parameters and the measurement plan. Contact can take place through any teamwork coordination application such as MS Teams or ZOOM.
- The method of the samples mounting and the working conditions are agreed before the experiment. The accelerating voltage in the microscope is fixed at 15kV. For samples with electrodes and electrical contacts, working with this voltage may result in discharges in the microscope chamber. Therefore, they are often imaged at reduced voltage. Willingness to work with the PEEM microscope at voltages other than 15kV must be communicated at least two weeks in advance.
The UARPES end station
- In the remote control experiments it is allowed to measure samples, the preparation of which in the UHV system is limited and does not require large amounts of work and detailed production technology. Therefore, remote experiments are primarily dedicated to samples whose clean surfaces are obtained by cleaving in UHV or by exfoliation. Ready-made samples in a vacuum suitcase are also allowed, provided that the User is able to ensure proper transport of the case to and from NCPS "Solaris" and provides detailed information on the use of the case and connection to the UHV system.
Before commencing remote measurements, the User must provide a detailed measurement schedule, including hours of support (on-site and remotely) by beamline operators. The schedule must be approved by the beamline manager.
- Sample preparation methods:
- The samples should be mounted on an omicron / flag holder according to the guidelines in the "UARPES sample mounting on the sample plate rules" document. User can make carriers on his own or use the carriers of the UARPES line in advance (taking into account the time for delivery);
- samples should be crystallographically oriented before connection to the holder;
- the samples should be installed permanently so that they will not be damaged during transport;
- for samples cleaving in UHV at cryogenic temperatures, stick a bar and a wire holding the bar after cleaving the sample in UHV;
- for installation, use materials compatible with UHV and non-reactive to UV radiation, e.g. using epotek H21D glue;
- each sample must be marked and described;
- detailed information on the conditioning of samples in UVH should be attached, including in particular the degassing / annealing procedure and the measurement temperature;
- samples for exfoliation should be secured for transport, so that they have not delaminated. They also require the determination of UHV exfoliation procedures, including the maximum pressure in the load lock chamber. The holders on which the exfoliation samples are mounted must be smooth, so that no fragments of tapes are left on the holder after the exfoliation. The user can attach a tape to the shipment or use the UARPES’ tapes available on the line.
- Before starting the experiments, the User agrees to read and act in accordance with the SES software manual and the UARPES software manual.
- During remote measurements, the user should use two monitors with a minimum diagonal of 21 inches so that (s)he can control the ARPES measurement and line settings simultaneously.
The XAS end station
- During remote measurements, the User receives a login and password to remotely log into the workstation that will be used to conduct the experiment. The workstation enables the same range of measurement control as the station next to the measuring station. This means that the User has access to basic applications: beamline synoptic panel, Sardana environment that allows for positioning the sample respect to the beam and collecting the X-ray absorption measurements, current analysis and preview of completed scans (PyMCA), GUI for changing the sensitivity of the current preamplifier, access to existing macros and the ability to create your own measurement sequences, preview on the time changes of the measurement beamline parameters (i.e. vacuum, temperature, motor positions, etc.)
- We do not allowed to perform remote measurements with the use of an electromagnet, because the technical conditions to be ensured require the constant presence of a person near end station and continuous monitoring of the cooling efficiency of the device.