Characterization of SQUID-based null detector for a quantum metrology triangle experiment

Juho Luomahaara, A. Kemppinen, Panu Helistö, Juha Hassel

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.
Original languageEnglish
Article number1601705
Number of pages5
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013
MoE publication typeA1 Journal article-refereed
EventApplied Superconductivity Conference, ASC 2012 - Portland, United States
Duration: 7 Oct 201212 Oct 2012

Fingerprint

SQUIDs
triangles
metrology
Detectors
detectors
Experiments
Refrigerators
refrigerators
transformers
Cryogenics
Dilution
cryogenics
dilution
amplifiers
interference
requirements

Keywords

  • quantum metrological triangle
  • SQUID ammeter

Cite this

@article{d54e8103e51f4b1592be1cb2398f603c,
title = "Characterization of SQUID-based null detector for a quantum metrology triangle experiment",
abstract = "We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.",
keywords = "quantum metrological triangle, SQUID ammeter",
author = "Juho Luomahaara and A. Kemppinen and Panu Helist{\"o} and Juha Hassel",
note = "Project code: 72785 Project code: 4160",
year = "2013",
doi = "10.1109/TASC.2012.2237212",
language = "English",
volume = "23",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronic Engineers IEEE",
number = "3",

}

Characterization of SQUID-based null detector for a quantum metrology triangle experiment. / Luomahaara, Juho; Kemppinen, A.; Helistö, Panu; Hassel, Juha.

In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 1601705, 2013.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characterization of SQUID-based null detector for a quantum metrology triangle experiment

AU - Luomahaara, Juho

AU - Kemppinen, A.

AU - Helistö, Panu

AU - Hassel, Juha

N1 - Project code: 72785 Project code: 4160

PY - 2013

Y1 - 2013

N2 - We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.

AB - We present characterization of a null detector designed for an experiment aimed to close the quantum metrological triangle (QMT). The device is a SQUID amplifier equipped with a large winding-ratio planar input transformer improving the current resolution. We demonstrate equivalent input current noise down to 14 fA/Hz1/2 . Furthermore, operation in a realistic environment of a dry dilution refrigerator hosting the QMT experiment is studied. We discuss particular challenges set by such system as the cryogenics introduces relatively large magnetic interference. We present data from measurements simulating the final QMT experiment and introduce the requirements for the averaging and bias reversal.

KW - quantum metrological triangle

KW - SQUID ammeter

U2 - 10.1109/TASC.2012.2237212

DO - 10.1109/TASC.2012.2237212

M3 - Article

VL - 23

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

M1 - 1601705

ER -