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Heterodyne Receivers
- SIS-345: The MPIfR 345 GHz dual-channel receiver has double sideband
temperatures of less than 125 K across a range of 320 to 375 GHz
frequency range at the telescope. Typically, the SIS-345 has
been used in single channel mode to achieve the highest sensitivity
in that channel.
Currently, it is provisionally accepted as a facility instrument.
- SIS-490: The SORAL 490
GHz single-channel receiver was installed at the SMT in early January 1998
after undergoing several improvements, including a new SIS junction that is
noticeably quieter at the highest frequencies. A new Zytex IR blocking
filter incurs fewer losses and yields lower thermal loading. The receiver now
achieves T(DSB) of 110-150 K across its 425 to 500 GHz tuning range. On
Saturn, the beam was found to be 16.5" in both elevation and azimuth. The main
beam efficiency on Saturn was about 45%. The forward scattering efficiency on
the moon was measured at 72%.
- 0.4mm: (600-720 GHz) Is now available for
general observations. See here
for information.
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