Title: Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model

Journal Article · · J.Astron.Telesc.Instrum.Syst.
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  1. McGill U.
  2. Cardiff U.
  3. KIPAC, Menlo Park; SLAC
  4. UC, Davis
  5. Fermilab; Chicago U., KICP
  6. Illinois U., Urbana, Astron. Dept.
  7. UC, Berkeley
  8. Melbourne U.
  9. Chicago U., KICP; Argonne
  10. Chicago U., KICP; Caltech
  11. Paris, Inst. Astrophys.
  12. Fermilab; Chicago U., KICP; Chicago U., Astron. Astrophys. Ctr.
  13. KIPAC, Menlo Park; Melbourne U.; Stanford U., Phys. Dept.
  14. Chicago U., EFI
  15. Argonne
  16. Chicago U., KICP; Argonne; Chicago U., Astron. Astrophys. Ctr.; Chicago U., EFI; Chicago U.
  17. Chicago U., KICP; Argonne; Chicago U., Astron. Astrophys. Ctr.
  18. Chicago U.
  19. SLAC
  20. Chicago U., KICP; Chicago U.
  21. Chicago U., KICP; Chicago U., Astron. Astrophys. Ctr.
  22. KIPAC, Menlo Park; SLAC; Stanford U., Phys. Dept.
  23. KEK, Tsukuba
  24. NIST, Boulder
  25. McGill U.; Canadian Inst. Advanced Res.
  26. LBL, Berkeley
  27. Colorado U.
  28. Illinois U., Urbana; Case Western Reserve U.; Colorado U.; Harvard-Smithsonian Ctr. Astrophys.; Toronto U., Astron. Dept.; Michigan State U.
  29. Chicago U., KICP
  30. KIPAC, Menlo Park; Stanford U., Phys. Dept.
  31. Illinois U., Urbana, Astron. Dept.; Argonne
  32. Fermilab
  33. UC, Berkeley; LBL, Berkeley
  34. Chicago U., KICP; Chicago U., Astron. Astrophys. Ctr.; Chicago U., EFI; Chicago U.
  35. Chicago U., KICP; Argonne; Chicago U.
  36. Illinois U., Urbana, Astron. Dept.; Illinois U., Urbana; Case Western Reserve U.; Colorado U.; Harvard-Smithsonian Ctr. Astrophys.; Toronto U., Astron. Dept.; Michigan State U.
  37. KIPAC, Menlo Park; SLAC; Chicago U., KICP
+ Show Author Affiliations

The third-generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. The technology used to read out and control these detectors, digital frequency-domain multiplexing (DfMUX), is conceptually the same as used for SPTpol, but extended to accommodate more detectors. A nearly 5× expansion in the readout operating bandwidth has enabled the use of this large focal plane, and SPT-3G performance meets the forecasting targets relevant to its science objectives. However, the electrical dynamics of the higher-bandwidth readout differ from predictions based on models of the SPTpol system due to the higher frequencies used and parasitic impedances associated with new cryogenic electronic architecture. To address this, we present an updated derivation for electrical crosstalk in higher-bandwidth DfMUX systems and identify two previously uncharacterized contributions to readout noise, which become dominant at high bias frequency. The updated crosstalk and noise models successfully describe the measured crosstalk and readout noise performance of SPT-3G. These results also suggest specific changes to warm electronics component values, wire-harness properties, and SQUID parameters, to improve the readout system for future experiments using DfMUX, such as the LiteBIRD space telescope.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Caltech; Canadian Inst. Advanced Res.; Cardiff U.; Case Western Reserve U.; Chicago U.; Chicago U., Astron. Astrophys. Ctr.; Chicago U., EFI; Chicago U., KICP; Colorado U.; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Harvard-Smithsonian Ctr. Astrophys.; Illinois U., Urbana; Illinois U., Urbana, Astron. Dept.; KEK, Tsukuba; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); McGill U.; Melbourne U.; Michigan State U.; NIST, Boulder; Paris, Inst. Astrophys.; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Stanford U., Phys. Dept.; Toronto U., Astron. Dept.; UC, Berkeley; UC, Davis
Sponsoring Organization:
US Department of Energy
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1824181
Report Number(s):
FERMILAB-PUB-21-193-AE; oai:inspirehep.net:1854818; arXiv:2103.16017
Journal Information:
J.Astron.Telesc.Instrum.Syst., Journal Name: J.Astron.Telesc.Instrum.Syst. Vol. 8
Country of Publication:
United States
Language:
English

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