rectangular, 23 x 3.4 mm, see chamber and setup details
The cell suspension was exposed to high powermicrowavepulses (HPMP) in a special plastic cuvette of cylindrical shape with a diameter of 10 mm and a height of 1 mm. The cuvette was placed inside a rectangular waveguide (cross-section 23 x 3.4 mm) at a distance of 25-30 mm from a waveguide flange with the help of a special foam-plastic holder.
Calculations of the magnitude of the electric field in a rectangular waveguide operating in the H10mode were carried out for the exterior and interior of the cuvette according to Lebedev  (see reference article); the maximal magnitude of the electric field in the cuvette was about 70 kV/m.
The average SAR of 1.6 kW/kg indicated applies to the center of the sample. Maximal SAR in the cellmedium toward the microwave source was approximately by 1.7 times higher than the average SAR.
Measurement and calculation details
Temperature measurements were carried out in the cuvette filled with 50 µl of physiological saline using a copper-constantan micro-thermocouple with a diameter of 50 µm. The accuracy of temperature readings was ±0.1 °C. A thermocouple was inserted into a modified cuvette from the bottom through a narrow slot in a wide wall of the waveguide. A digital voltmeter was used for the measurements of voltage generated by a thermocouple. The time constant of the temperature measuring system was 0.05 s. The average initial rate of temperature rise was 0.37 ± 0.01 °C/s, which corresponded to the average SAR of 1.6 kW/kg (peak SAR was assessed as about 300 MW/kg).