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Curriculum Vitae
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Current Projects:
  SO
  MKID Development
  AME/GBT
  Spectral Distortions
  CMB-S4
  Systematic Errors

Design Studies:
  PICO
  CMB-S4
  EPIC-IM

Past Projects:
  CalSat
  Cryogenic Motor
  PICO Optics
  EBEX
  CPR (BCP)
  GLP (arXiv)
  SKIP (arXiv)
  PIPER (arXiv)
  APEX-SZ
  EPIC-IM Optics
  Systematic Errors
  Map Making
  CLOVER
  Achromatic HWP
  MAXIPOL
  MAXIMA

Research Support:
  NSF
  NASA
  Columbia RISE
  ONR

Professional Links:
  UVA Astronomy
  Columbia Physics
  NASA/GSFC
  Berkeley
  Oxford
  Cardiff AIG
  U of M Physics

Photos and Video:
  Balloon Flight
  EBEX-NA
  MAXIPOL
  MAXIMA-2

Brad Johnson
Full Publication List: (pdf)

Selected Publications:

"The Simons Observatory: A large-diameter truss for a refracting telescope cooled to 1 K." Crowley, K. D., Dow, P., Shroyer, J. E., Johnson, B. R., et al. (2022) Rev. Sci. Instrum., 93, 055106. (arXiv)

"Development of Multi-Chroic MKIDs for Next-Generation CMB Polarization Studies." Johnson, B. R., et al. (2018) J. Low Temp. Phys., 193, 3-4, 103-112. (arXiv)

"Constraining the Anomalous Microwave Emission Mechanism in the S140 Star Forming Region with Spectroscopic Observations Between 4 and 8 GHz at the Green Bank Telescope." Abitbol, M. H., Johnson, B. R., et al. (2018) ApJ, 864, 97. (arXiv)

"Design and performance of dual-polarization lumped-element kinetic inductance detectors for millimeter-wave polarimetry." McCarrick, H., Jones, G., Johnson, B. R., et al. (2018) A&A, 610, A45. (arXiv)

"A Large-Diameter Hollow-Shaft Cryogenic Motor Based on a Superconducting Magnetic Bearing for Millimeter-Wave Polarimetry." Johnson, B. R., Columbro, F., Araujo, D., et al. (2017) Rev. Sci. Instrum., 88, 105102. (arXiv)

"Prospects for measuring cosmic microwave background spectral distortions in the presence of foregrounds." Abitbol, M. H., et al. (2017) MNRAS, 471, 1126-1140. (arXiv)

"High quality factor manganese-doped aluminum lumped-element kinetic inductance detectors sensitive to frequencies below 100 GHz." Jones, G., Johnson, B. R., et al. (2017) Appl. Phys. Lett., 110, 222601. (arXiv) Our article was featured on the cover of the journal.

"Magnetic field dependence of the internal quality factor and noise performance of lumped-element kinetic inductance detectors." Flanigan, D., Johnson, B. R., et al. (2016) Appl. Phys. Lett., 110, 222601. (arXiv)

"Photon noise from chaotic and coherent millimeter-wave sources measured with horn-coupled, aluminum lumped-element kinetic inductance detectors." Flanigan, D., McCarrick, H., Jones, G., Johnson, B. R., et al. (2016) Appl. Phys. Lett., 108, 083504. (arXiv)

"Foreground-induced biases in CMB polarimeter self-calibration." Abitbol, M., Hill, C., and Johnson, B. R. (2016) MNRAS, 457, 2, 1796-1803. (arXiv)

"Precision Tests of Parity Violation Over Cosmological Distances." Kaufman, J., Keating, B., and Johnson, B. R. (2016) MNRAS, 455, 2, 1981-1988. (arXiv) This paper won the Buchalter Cosmology Prize (Secon Prize) in 2014.

"A Titanium Nitride Absorber for Reducing Optical Cross-Talk in Horn-Coupled Aluminum LEKIDs for Millimeter Wavelengths." McCarrick, H., Flanigan, D., Jones, G., Johnson, B. R., et al. (2016) J. Low Temp. Phys., 184, 1, 154-160. (arXiv)

"A CubeSat for Calibrating Ground-Based and Sub-Orbital Millimeter-Wave Polarimeters (CalSat)." Johnson, B. R., et al. (2015) J. Astron. Instrum., 4, 2, 1550007. (arXiv)

"Horn-Coupled, Commercially-Fabricated Aluminum Lumped-Element Kinetic Inductance Detectors for Millimeter Wavelengths." McCarrick, H., Flanigan, D., Jones, G., Johnson, B. R., et al. (2014) Rev. Sci. Instrum., 85, 1, 123117. (arXiv)

"A LEKID-based CMB instrument design for large-scale observations in Greenland." Araujo, D., et al. (2014) Proc. SPIE, 9153, 91530W. (arXiv)

"Invited Article: Millimeter-wave bolometer array receiver for the Atacama pathfinder experiment Sunyaev-Zel'dovich (APEX-SZ) instrument." Schwan, D., et al. (2011) Rev. Sci. Instrum., 82, 091301. (arXiv) Our article was featured on the cover of the journal.

"Optical design of the EPIC-IM crossed Dragone telescope." Tran, H., Johnson, B. R., Dragovan, M., Bock, J., et al. (2010) Proc. SPIE, 7731, 77311R.

"Map making in small field modulated CMB polarization experiments: approximating the maximum likelihood method." Sutton, D., Johnson, B. R., et al. (2009) MNRAS, 393, 3, 894-910. (arXiv)

"Systematic errors in cosmic microwave background polarization measurements." O'Dea, D., Challinor, A., and Johnson, B. R., et al. (2007) MNRAS, 376, 4, 1767-1783. (arXiv)

"MAXIPOL: Cosmic Microwave Background Radiation Polarimetry Using a Half-Wave Plate." Johnson, B. R., et al. (2007) ApJ, 665, 42. (arXiv)