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

Model No. UPJ07

FEATURE

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Superconduction coxial 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 65GHz
* 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.

【Related Contents】
👉 Cryogenic Products Line-up

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 a paper of ETH Zürich.

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.

Materal Characterstics

	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 Number	Max. Frequency （GHz）	Outter Conductor		Dielectroic		Inner Conductor		Heat Quantity （μw/k）*	Min. Bending Radius （mm）	Available Connectors
Part Number	Max. Frequency （GHz）	Diameter （mm）	Material	Diameter （mm）	Material	Diameter （mm）	Material	4K-20K	Min. Bending Radius （mm）	Available Connectors
NbTiNbTi085	66GHz	2.20	NbTi	1.62	PTFE	0.51	NbTi	0.3	30.0	SMA, APC2.9, APC2.4, APC1.85,GPPO
NbTiNbTi047	119GHz	1.19		0.94		0.29		0.09	10.0
NbTiNbTi034	170GHz	0.86		0.46		0.20		0.06	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)	GPPO(SSMP)
Max. operating frequency (GHz)	18.5	40 or (46)	50	60 or (65)	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)