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Table 1 Summary of waveguide and measurement parameters

From: Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures

ID CC085NbTi CC085Nb CC141Al CC085Cu WR90Alc WR90Al WR90CuSn
dim. [mm (in)] 2.2 (0.085) 2.2 (0.085) 3.6 (0.141) 2.2 (0.085) WR90 WR90 WR90
conductor NbTi/NbTi Nb/Nb Al/SPC Cu/SPCW coated Al Al Cu-Sn
dielectric ldPTFE ldPTFE ldPTFE sPTFE vacuum vacuum vacuum
length [mm (in)] 110 110 900 120 304.8 (12) 304.8 (12) 304.8 (12)
T(BT) [mK] 120 50 60 15 60 25 50
T(4K) [K] 4.0 4.0 4.0 4.1 4.3 4.0 4.0
ν range [GHz] 4.2-12.7 4.1-12.5 3.5-12.7 3.6-12.7 7.9-12.3 7.7-12.8 7.7-12.8
(BT) 0.1-2 0.3-10 1-2 1-3 0.2-1 1-4 1-3
(4K) 0.4-5 0.2-4 8-16 4-9 2-10 3-12 5-20
  1. The indicated dimension (dim.) specifies the outer diameter of the coaxial cables and the EIA type of the rectangular waveguides. The conductor and dielectric materials are specified as well as the length of the resonant section employed for the measurements. The temperature T measured at the waveguide is indicated. The average photon number on resonance is shown for the investigated frequency (ν) range.