The ALMA Receivers, at the leading-edge of technology

Details The ALMA Receivers, at the leading-edge of technology The ALMA Receivers, at the leading-edge of technology

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009alman...2...13.&link_type=abstract

ALMA Newsletter, vol. 2, p. 12-14

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Alma

Scientific paper

There are three essential items that contribute to the superior sensitivity of ALMA. These There are three essential items that contribute to the superior sensitivity of ALMA. These are: (1) the high, dry site; (2) the large collecting area: and (3) the receiver system. The ALMA project has devoted a great deal to maximize the sensitivity contribution from the first two items. These include the Chajnantor site and the collecting area provided by 66 antennas that allow operation to 1 THz. In the following, we give a short update on the status of the receivers. In the optical and near infrared (near IR) wavelength range, the sensitivity of astronomical detector systems has improved by about a factor of 25 since the 1960s. The sensitivity of millimetre and sub-millimetre astronomical receivers has improved by at least this factor over the same time. In the last few years, receiver sensitivity has improved by another factor of two to four, due to the ALMA development program.

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