Transport Measurements
ARPES at MAESTRO can be conducted with simultaneous electronic current and voltages applied to the samples.
We provide a total of 9 electronic contacts (8 independent floating contacts plus the sample puck at ground potential).
We provide a variety of transport-compatible sample holders, see Sample Holders.
We provide two built-in Keithley 2450 SMUs (Source Measurement Units) each providing 4-quadrant precision voltage and current source/load coupled with measurements. These instruments can simultaneously source and measure current from 10 fA to 10 A pulse and/or voltage from 100 nV to 1100V . These enable both low-current and high-power measurements and can also drive small local sample heaters.
The SMUs are multiplexed to the 8-contact sample holder stage through an Agilent (Keysight) 34970 Data Aquisition Switch Unit. This enables users to wire their samples arbitrarily to any of the 8 available contact pads. A convenient labview software interface, below, controls the contact assignments and the programmable SMU states.
Custom experiment workflows may be developed in collaboration with beamline scientists.
