Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation

Mikko Kiviranta; Jari S. Penttilä; Leif Grönberg; Juha Hassel; Antti Virtanen; Heikki Seppä

doi:10.1088/0953-2048/17/5/038

Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation

Mikko Kiviranta^*
, Jari S. Penttilä
, Leif Grönberg
, Juha Hassel
, Antti Virtanen
, Heikki Seppä

^*Corresponding author for this work

BA6215 Photonics and superconductive electronics

VTT (former employee or external)

Research output: Contribution to journal › Article › Scientific › peer-review

15 Citations (Scopus)

Abstract

We have developed a set of dc SQUIDs intended for frequency-domain multiplexed readout of transition edge sensor (TES) arrays. The first design is based on the Ketchen-style washer, and has exhibited a 1.2 × 10⁻⁷ Φ₀ Hz^1/2 flux noise both at 4.2 and 0.43 K. The second design is based on the multiloop structure and utilizes the spoke-terminating resistors which double as junction shunts in order to minimize the excess noise due to the resonance damping. The multiloop device has exhibited a 3.5 × 10⁻⁷ Φ₀ Hz^1/2 flux noise level at 4.2 K. The mutual inductances are chosen such that a typical ac-biased TES-based x-ray calorimeter would need only a moderate amount of negative feedback in order to handle the dynamic range of the signal.

Original language	English
Pages (from-to)	285-289
Journal	Superconductor Science and Technology
Volume	17
Issue number	5
DOIs	https://doi.org/10.1088/0953-2048/17/5/038
Publication status	Published - 2004
MoE publication type	A1 Journal article-refereed

Keywords

SQUID
washer
transition edge sensor
bipolar transistors
superconducting transistors

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10.1088/0953-2048/17/5/038

Cite this

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title = "Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation",

abstract = "We have developed a set of dc SQUIDs intended for frequency-domain multiplexed readout of transition edge sensor (TES) arrays. The first design is based on the Ketchen-style washer, and has exhibited a 1.2 × 10−7 Φ0 Hz1/2 flux noise both at 4.2 and 0.43 K. The second design is based on the multiloop structure and utilizes the spoke-terminating resistors which double as junction shunts in order to minimize the excess noise due to the resonance damping. The multiloop device has exhibited a 3.5 × 10−7 Φ0 Hz1/2 flux noise level at 4.2 K. The mutual inductances are chosen such that a typical ac-biased TES-based x-ray calorimeter would need only a moderate amount of negative feedback in order to handle the dynamic range of the signal. ",

keywords = "SQUID, washer, transition edge sensor, bipolar transistors, superconducting transistors",

author = "Mikko Kiviranta and Penttil{\"a}, \{Jari S.\} and Leif Gr{\"o}nberg and Juha Hassel and Antti Virtanen and Heikki Sepp{\"a}",

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language = "English",

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journal = "Superconductor Science and Technology",

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TY - JOUR

T1 - Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation

AU - Kiviranta, Mikko

AU - Penttilä, Jari S.

AU - Grönberg, Leif

AU - Hassel, Juha

AU - Virtanen, Antti

AU - Seppä, Heikki

PY - 2004

Y1 - 2004

N2 - We have developed a set of dc SQUIDs intended for frequency-domain multiplexed readout of transition edge sensor (TES) arrays. The first design is based on the Ketchen-style washer, and has exhibited a 1.2 × 10−7 Φ0 Hz1/2 flux noise both at 4.2 and 0.43 K. The second design is based on the multiloop structure and utilizes the spoke-terminating resistors which double as junction shunts in order to minimize the excess noise due to the resonance damping. The multiloop device has exhibited a 3.5 × 10−7 Φ0 Hz1/2 flux noise level at 4.2 K. The mutual inductances are chosen such that a typical ac-biased TES-based x-ray calorimeter would need only a moderate amount of negative feedback in order to handle the dynamic range of the signal.

AB - We have developed a set of dc SQUIDs intended for frequency-domain multiplexed readout of transition edge sensor (TES) arrays. The first design is based on the Ketchen-style washer, and has exhibited a 1.2 × 10−7 Φ0 Hz1/2 flux noise both at 4.2 and 0.43 K. The second design is based on the multiloop structure and utilizes the spoke-terminating resistors which double as junction shunts in order to minimize the excess noise due to the resonance damping. The multiloop device has exhibited a 3.5 × 10−7 Φ0 Hz1/2 flux noise level at 4.2 K. The mutual inductances are chosen such that a typical ac-biased TES-based x-ray calorimeter would need only a moderate amount of negative feedback in order to handle the dynamic range of the signal.

KW - SQUID

KW - washer

KW - transition edge sensor

KW - bipolar transistors

KW - superconducting transistors

U2 - 10.1088/0953-2048/17/5/038

DO - 10.1088/0953-2048/17/5/038

M3 - Article

SN - 0953-2048

VL - 17

SP - 285

EP - 289

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 5

ER -

Design and performance of multiloop and washer SQUIDs intended for sub-kelvin operation

Abstract

Keywords

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