Publication

Advanced tuning algorithms for high-frequency SIS mixers

Hesper, R., Barkhof, J., Vos, T. & Baryshev, A., 1-Jun-2019.

Research output: Contribution to conferencePaperAcademic

Three tuning parameters are key to SIS performance: SIS bias voltage, LO pumping level and Josephson current suppression. The former two are relatively easy to perform automatically, although there are a couple of pitfalls. The suppression of the Josephson current, however, is much more complicated, especially in the high-current-density AlN-barrier junctions used in ALMA Band 9. The tuning parameter sets that were supplied with the receivers were always biased towards safer and more repeatable regimes for operational reasons. Here we present results of the ALMA Band 9 Advanced Tuning Study commissioned by ESO. The objective of this study is to investigate more "intelligent" tuning algorithms which should enable the receivers to operate in more critical regimes that were previously avoided, but with possibly a considerable increase in performance.
Original languageEnglish
Publication statusPublished - 1-Jun-2019
EventALMA Development Workshop, ESO 2019 - ESO Garching, Garching, Germany
Duration: 3-Jun-20195-Jun-2019

Conference

ConferenceALMA Development Workshop, ESO 2019
CountryGermany
CityGarching
Period03/06/201905/06/2019

Event

ALMA Development Workshop, ESO 2019

03/06/201905/06/2019

Garching, Germany

Event: Conference

    Keywords

  • Zenodo community almadevel2019

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