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21 cm Cosmology Workshop

August 30, 2022 to September 2, 2022
UW Madison
America/Chicago timezone
The workshop focuses on sharing recent progress and challenges from all the major 21 cm intensity mapping efforts, both EoR and post-EoR, to help this field reach its full potential. We will discuss important common challenges: calibration, sources of local correlated signals, foreground mitigation, cross-correlations, systematics from digital signal processing, validation, and software tools.

Scientific organizing Committee

Session

Thursday Morning - Calibration II Beams and EM Simulations; Session Chair - George Carter

Sep 1, 2022, 9:40 AM
B343 Sterling Hall (UW Madison)

B343 Sterling Hall

UW Madison

475 North Charter Street Madison, WI 53706

Presentation materials

There are no materials yet.

  1. 18. Characterization of the LWA Antenna and Station Beam Pattern
    Chris DiLullo (NASA Goddard)
    9/1/22, 9:45 AM

    I will present ongoing work to better characterize the response of the Long Wavelength Array (LWA) antenna. Recent work has focused on directly measuring the impedance mismatch between the antenna and front end electronics (FEEs). Custom calibration and testing fixtures were created which allows for measurement of the antenna impedance at the feed points on the FEE boards. These measurements...

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  2. 19. Beam calibration using holography for CHIME
    Alex Reda (Yale)
    9/1/22, 10:10 AM
  3. 22. HIRAX Electromagnetic Design
    Ben Saliwanchik (Brookhaven National Lab)
    9/1/22, 10:35 AM
  4. 21. Capturing the shape and variations of beams with holography
    Julien Girard (Observatoire de Paris)
    9/1/22, 11:00 AM

    With unprecedented sensitivity and field of view, new generation radiotelescopes at low frequencies have to face new calibration challenges. One of the main drivers to cope with direction-dependent distortion (due to strong off-axis sources) is to develop a knowledge of beamshapes and how they vary in frequency and direction. I am going to present recent modelling work carried on VLA and...

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