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The Expanded VLA Project
VLA Expansion Project

The Expanded Very Large Array Project:
A Radio Telescope to Resolve Cosmic Evolution
Phase I


Key Science Examples Capabilities Technical Advances

EVLA Phase I - Key Science Examples

  • Measuring the three-dimensional structure of the Sun's magnetic field
  • Mapping the changing structure of the dynamic heliosphere
  • Measuring the rotation speed of asteroids
  • Observing ambipolar diffusion and thermal jet motions in young stellar objects
  • Measuring three-dimensional motions of ionized gas and stars in the center of the Galaxy
  • Mapping the magnetic fields in individual galaxy clusters
  • Conducting unbiased searches for redshifted atomic and molecular absorption
  • Looking through the enshrouding dust to image the formation of high-redshift galaxies
  • Disentangling starburst from black hole activity in the early universe
  • Providing direct size and expansion estimates for up to 100 gamma-ray bursts every year

  • An aerial view of the Very Large Array located on the Plains of San Agustin, New Mexico

    EVLA Phase I - Capabilities

    Continuum sensitivity improvement by up to a factor of 5 (below 10 GHz) to more than 20 (between 10 and 50 GHz). 

    Frequency Accessibility:
    Operation at any frequency between 1.0 and 50 GHz. Two pairs of signals, each pair with opposite polarizations up to 4 GHz bandwidth, making a total available bandwidth of 8 GHz at each polarization, and independently tunable at any frequency within any given band.

    Spectral Capabilities:
    The WIDAR correlator will provide many frequency channels (minimum of 16,384, up to 262,144), process the wide bandwidths, and give frequency resolution better than 1 Hz if necessary.

    Operational Changes:
    Phase I will provide dynamical scheduling: observing blocks will be scheduled on the basis of weather, array configuration, and science. "Default" images will be routinely and automatically produced for all observing programs, and be made available to users.

    Phase I - Technical Advances

  • Wideband receiver systems
  • State-of-the-art, flexible correlator
  • Fiber-optic data transmission system
  • New digital electronics
  • New powerful on-line control system
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