Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver

Caleb H. Wheeler; Marko Neric; Christopher E. Groppi; Matthew Underhill; Hamdi Mani; Sander Weinreb; Damon S. Russell; Jacob W. Kooi; Arthur W. Lichtenberger; Christopher K. Walker; Craig Kulesa

doi:10.1117/12.2231358

Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver

Caleb H. Wheeler, Marko Neric, Christopher E. Groppi, Matthew Underhill, Hamdi Mani, Sander Weinreb, Damon S. Russell, Jacob W. Kooi, Arthur W. Lichtenberger, Christopher K. Walker, Craig Kulesa

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We present the results from the magnetic field generation within the Kilopixel Array Pathfinder Project (KAPPa) instrument. The KAPPa instrument is a terahertz heterodyne receiver using a Superconducting-Insulating- Superconducting (SIS) mixers. To improve performance, SIS mixers require a magnetic field to suppress Josephson noise. The KAPPa test receiver can house a tunable electromagnet used to optimize the applied magnetic field. The receiver is also capable of accommodating a permanent magnet that applies a fixed field. Our permanent magnet design uses off-the-shelf neodymium permanent magnets and then reshapes the magnetic field using machined steel concentrators. These concentrators allow the use of an unmachined permanent magnet in the back of the detector block while two small posts provide the required magnetic field across the SIS junction in the detector cavity. The KAPPa test receiver is uniquely suited to compare the permanent magnet and electromagnet receiver performance. The current work includes our design of a 'U' shaped permanent magnet, the testing and calibration procedure for the permanent magnet, and the overall results of the performance comparison between the electromagnet and the permanent magnet counterpart.

Original language	English (US)
Title of host publication	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII
Editors	Jonas Zmuidzinas, Wayne S. Holland
Publisher	SPIE
ISBN (Electronic)	9781510602076
DOIs	https://doi.org/10.1117/12.2231358
State	Published - 2016
Event	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII - Edinburgh, United Kingdom Duration: Jun 28 2016 → Jul 1 2016

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	9914
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Other

Other	Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII
Country/Territory	United Kingdom
City	Edinburgh
Period	6/28/16 → 7/1/16

Keywords

Array Receivers
Heterodyne
KAPPa
SIS junction
THz

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.2231358

Cite this

Wheeler, C. H., Neric, M., Groppi, C. E., Underhill, M., Mani, H., Weinreb, S., Russell, D. S., Kooi, J. W., Lichtenberger, A. W., Walker, C. K., & Kulesa, C. (2016). Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver. In J. Zmuidzinas, & W. S. Holland (Eds.), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII Article 99141W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9914). SPIE. https://doi.org/10.1117/12.2231358

Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver. / Wheeler, Caleb H.; Neric, Marko; Groppi, Christopher E. et al.
Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. ed. / Jonas Zmuidzinas; Wayne S. Holland. SPIE, 2016. 99141W (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9914).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Wheeler, CH, Neric, M, Groppi, CE, Underhill, M, Mani, H, Weinreb, S, Russell, DS, Kooi, JW, Lichtenberger, AW, Walker, CK & Kulesa, C 2016, Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver. in J Zmuidzinas & WS Holland (eds), Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII., 99141W, Proceedings of SPIE - The International Society for Optical Engineering, vol. 9914, SPIE, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, Edinburgh, United Kingdom, 6/28/16. https://doi.org/10.1117/12.2231358

Wheeler CH, Neric M, Groppi CE, Underhill M, Mani H, Weinreb S et al. Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver. In Zmuidzinas J, Holland WS, editors, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. SPIE. 2016. 99141W. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2231358

Wheeler, Caleb H. ; Neric, Marko ; Groppi, Christopher E. et al. / Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver. Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII. editor / Jonas Zmuidzinas ; Wayne S. Holland. SPIE, 2016. (Proceedings of SPIE - The International Society for Optical Engineering).

@inproceedings{8883b5ae0b4440d7bd9d191aec88fae2,

title = "Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver",

abstract = "We present the results from the magnetic field generation within the Kilopixel Array Pathfinder Project (KAPPa) instrument. The KAPPa instrument is a terahertz heterodyne receiver using a Superconducting-Insulating- Superconducting (SIS) mixers. To improve performance, SIS mixers require a magnetic field to suppress Josephson noise. The KAPPa test receiver can house a tunable electromagnet used to optimize the applied magnetic field. The receiver is also capable of accommodating a permanent magnet that applies a fixed field. Our permanent magnet design uses off-the-shelf neodymium permanent magnets and then reshapes the magnetic field using machined steel concentrators. These concentrators allow the use of an unmachined permanent magnet in the back of the detector block while two small posts provide the required magnetic field across the SIS junction in the detector cavity. The KAPPa test receiver is uniquely suited to compare the permanent magnet and electromagnet receiver performance. The current work includes our design of a 'U' shaped permanent magnet, the testing and calibration procedure for the permanent magnet, and the overall results of the performance comparison between the electromagnet and the permanent magnet counterpart.",

keywords = "Array Receivers, Heterodyne, KAPPa, SIS junction, THz",

author = "Wheeler, {Caleb H.} and Marko Neric and Groppi, {Christopher E.} and Matthew Underhill and Hamdi Mani and Sander Weinreb and Russell, {Damon S.} and Kooi, {Jacob W.} and Lichtenberger, {Arthur W.} and Walker, {Christopher K.} and Craig Kulesa",

note = "Publisher Copyright: {\textcopyright} 2016 SPIE.; Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII ; Conference date: 28-06-2016 Through 01-07-2016",

year = "2016",

doi = "10.1117/12.2231358",

language = "English (US)",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Jonas Zmuidzinas and Holland, {Wayne S.}",

booktitle = "Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII",

}

TY - GEN

T1 - Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver

AU - Wheeler, Caleb H.

AU - Neric, Marko

AU - Groppi, Christopher E.

AU - Underhill, Matthew

AU - Mani, Hamdi

AU - Weinreb, Sander

AU - Russell, Damon S.

AU - Kooi, Jacob W.

AU - Lichtenberger, Arthur W.

AU - Walker, Christopher K.

AU - Kulesa, Craig

PY - 2016

Y1 - 2016

N2 - We present the results from the magnetic field generation within the Kilopixel Array Pathfinder Project (KAPPa) instrument. The KAPPa instrument is a terahertz heterodyne receiver using a Superconducting-Insulating- Superconducting (SIS) mixers. To improve performance, SIS mixers require a magnetic field to suppress Josephson noise. The KAPPa test receiver can house a tunable electromagnet used to optimize the applied magnetic field. The receiver is also capable of accommodating a permanent magnet that applies a fixed field. Our permanent magnet design uses off-the-shelf neodymium permanent magnets and then reshapes the magnetic field using machined steel concentrators. These concentrators allow the use of an unmachined permanent magnet in the back of the detector block while two small posts provide the required magnetic field across the SIS junction in the detector cavity. The KAPPa test receiver is uniquely suited to compare the permanent magnet and electromagnet receiver performance. The current work includes our design of a 'U' shaped permanent magnet, the testing and calibration procedure for the permanent magnet, and the overall results of the performance comparison between the electromagnet and the permanent magnet counterpart.

AB - We present the results from the magnetic field generation within the Kilopixel Array Pathfinder Project (KAPPa) instrument. The KAPPa instrument is a terahertz heterodyne receiver using a Superconducting-Insulating- Superconducting (SIS) mixers. To improve performance, SIS mixers require a magnetic field to suppress Josephson noise. The KAPPa test receiver can house a tunable electromagnet used to optimize the applied magnetic field. The receiver is also capable of accommodating a permanent magnet that applies a fixed field. Our permanent magnet design uses off-the-shelf neodymium permanent magnets and then reshapes the magnetic field using machined steel concentrators. These concentrators allow the use of an unmachined permanent magnet in the back of the detector block while two small posts provide the required magnetic field across the SIS junction in the detector cavity. The KAPPa test receiver is uniquely suited to compare the permanent magnet and electromagnet receiver performance. The current work includes our design of a 'U' shaped permanent magnet, the testing and calibration procedure for the permanent magnet, and the overall results of the performance comparison between the electromagnet and the permanent magnet counterpart.

KW - Array Receivers

KW - Heterodyne

KW - KAPPa

KW - SIS junction

KW - THz

UR - http://www.scopus.com/inward/record.url?scp=85015018736&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85015018736&partnerID=8YFLogxK

U2 - 10.1117/12.2231358

DO - 10.1117/12.2231358

M3 - Conference contribution

AN - SCOPUS:85015018736

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII

A2 - Zmuidzinas, Jonas

A2 - Holland, Wayne S.

PB - SPIE

T2 - Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII

Y2 - 28 June 2016 through 1 July 2016

ER -

Results of using permanent magnets to suppress Josephson noise in the KAPPa SIS receiver

Abstract

Publication series

Other

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this