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

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

Earth and Space Exploration, School of (SESE)

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., 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 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, C, 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 C, 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 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).

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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.",

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AU - Wheeler, Caleb H.

AU - Neric, Marko

AU - Groppi, Christopher

AU - Underhill, Matthew

AU - Mani, Hamdi

AU - Weinreb, Sander

AU - Russell, Damon S.

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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.

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ER -

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

Abstract

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Keywords

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