Superconducting Coaxial Cable Assemblies
(0.085" / 0.047" / 0.034" type NbTi-NbTi Superconducting Coaxial Cables)

Model No. UPJ07

Feature

Superconducting coaxial cable for cryogenic and strong electromagnetic field,
recognized by research institutions all over the world.

Highly effective at thermal gradient below 4K.

Very low thermal conductivity; 1/3000 of copper(Cu), 1/300 of niobium(Nb).
Highly durable in strong electromagnetic field of up to 11T(tesla).
NbTi(Nb:50%)=3×10^-4 [W/cm]
40GHz standard, available up to 66GHz
Minimum bend radius: 30mm
For strong magnetic field
Copper inner-coated Stainless coaxial cables are effective and useful for a temperature range of between room temperature and 4k.
Connectors available for ;

【Related Contents】
👉 Cryogenic Products Line-up
👉 Bias-Tee for Cryogenic

Acknowledgements

EPJ Quantum Technology, 04 May 2017

Philipp Kurpiers* ,Theodore Walter,Paul Magnard,Yves Salathe and Andreas Wallraﬀ
Department of Physics,ETH Zürich, Zürich,CH-8093,Switzerland
"Characterizing the attenuation of coaxial and rectangular microwave-frequency waveguides at cryogenic temperatures"

※Evaluation of Keycom's NbTi Superconducting Coaxial Cables and actual measurement result of temperature/frequency/strong magnetic field - characteristics of attenuation amount are reported in the paper.

Nature Vol. 398, No. 6730, pp.786 - 788, 29 April 1999

Y. Nakamura*, Yu. A. Pashkin & J. S. Tsai
NEC Fundamental Research Laboratories, CREST, Japan Science and Technology Corporation (JST)
"Coherent control of macroscopic quantum states in a single-Cooper-pair box"

※Keycom's Superconducting Coaxial Cables, Cryogenic Coaxial Cables, Cryogenic printed boards are used.

Material Characteristics

	w/cmk at 1K(1)	dB/m at 10GHz,4K(2)	effect(1)*(2)
Cu	0.15	1	0.15
Ag	1	1.1	1.1
Bs:Cu65%	0.007	1.47	0.010 (non-magnetic)
SUS304	0.0015(ULT05)	1.14	0.002
Nb	0.1	0.8	0.08 (non-magnetic)
NbTi:Nb47%	0.0003	1.0	0.0003
PTFE	0.000035

*Measurements were taken after superconducting coaxial cables became completely super conductive.

Variation of insertion loss with frequency(4K,10mK)

This is an extract of a part of the ETH Zürich's paper above on measurement results using KEYCOM products(Page 9 of 15).

Pulse propagation property of 10m NbTi-NbTi 085 at 4K including short length extension cable at room temperature

Specification

Part No.	Max. operating frequency (GHz)	External conductor		Dielectric		Internal conductor		Thermal conductivity (uW・cm/k)	Min. bending radius(mm)	Available Connectors
		Outer diameter(mm)	Material	Outer diameter(mm)	Material	Outer diameter(mm)	Material
NbTiNbTi085	66	2.2 [085 inch type]	NbTi	1.62	Foamed PTFE	0.51	NbTi	26.00	30.0	SMA, APC2.9, APC2.4, APC1.85, GPPO
NbTiNbTi047	119	1.19 [047 inch type]		0.94		0.29		7.40	10.0
NbTiNbTi034	170	0.86 [034 inch type]		0.66		0.20		4.60	8.0

*Heat quantity required for one end of 10 cm long cable (excluding connectors) to reach 20 K or 100 K when 4 K heat anchor is applied to the other end of the cable.

Connector type	SMA	2.9mm(K)	2.4mm	1.8mm(V)	GPO(SMP)	GPPO(SMPM)
Max. operating frequency (GHz)	18.5	40 or (46)	50	60 or (65)	40	60 or (65)

Order model example

NbTiNbTi085A	-	K(m)K(f)	-	1000
Cable type		Connector name		Connector phase front length (mm) max. 1000mm

0.085" type
Applicable connectors SMA, APC2.9, APC2.4, APC1.85
A crimping connection is standard.

Superconducting Coaxial Cable Assemblies (0.085" / 0.047" / 0.034" type NbTi-NbTi Superconducting Coaxial Cables)