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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


Selected EBEX Publications:

"Intensity-coupled Polarization in Instruments with a Continuously Rotating Half-Wave Plate." Didier et al. (2019) ApJ, 876, 54. (arXiv)

"The EBEX Balloon Borne Experiment - Optics, Receiver, and Polarimetry." EBEX Collaboration (2018) ApJS, 239, 7. (arXiv)

"The EBEX Balloon Borne Experiment - Detectors and Readout." EBEX Collaboration (2018) ApJS, 239, 8. (arXiv)

"The EBEX Balloon-Borne Experiment - Gondola, Attitude Control, and Control Software." EBEX Collaboration (2018) ApJS, 239, 9. (arXiv)

"Developments of highly-multiplexed, multi-chroic pixels for Balloon-Borne Platforms." Aubin et al. (2018) J. Low Temp. Phys., 193, 3-4, 298-304. (arXiv)

"EBEX: A balloon-borne CMB polarization experiment." Reichborn-Kjennerud et al. (2010) Proc. SPIE, 7741, 7741C. (arXiv)

"The Impact of the Spectral Response of an Achromatic Half-Wave Plate on the Measurement of the Cosmic Microwave Background Polarization." Bao et al. (2012) ApJ, 747:97. (arXiv)

"Analysis of performance of three- and five-stack achromatic half-wave plates at millimeter wavelengths." Matsumura et al. (2009) Appl. Opt., 48, 19, 3614-3625. (arXiv)


EBEX Launch from NASA's Columbia Scientific Ballooning Facility in Ft. Sumner, New Mexico -- June 11, 2009. Video from Asad Aboobaker.




Photo of EBEX during flight taken by Ted Dunham, Lowell Instrument Scientist, Lowell Observatory. The photo was taken around 6:00 or 6:30 PM on June 11, 2009 with an 8" reflecting telescope.