Oral Presentation
Current Status of wSMA Receiver
Presenter: Ming-Jye Wang (Institute of Astronomy and Astrophysics, Academia Sinica)
The SubMillimeter Array (SMA) is the first interferometer with 8 six-meter dishes operating at sub-millimeter wavelength. The receivers have served more than 20 years with some upgrades. To keep the SMA competitive, new receivers are under construction with the latest receiver technologies since 2017. The new SMA receiver will have wide IF-bandwidth (4-18 GHz, 0.5-20 GHz optional), so called wSMA receiver. Two receivers cover the low band (240GHz) and high band (320GHz) with dual polarization capability. A selecting wheel provides the different observation modes. All key components have been developed and tested in laboratory and demonstrated good performance. Two prototype cryostats were delivered. One cryostat with thermal property improvement shows reasonable base temperature at mixer stage and overall cooling time. The alignment of optics is also checked. The construction of low-band receiver cartridge is ongoing. The installation of first cryostat is planned at next spring. The details will be presented in this talk.
asiaa.sinica.edu.tw