Abstract
We are developing a superconducting camera based on microwave kinetic inductance detectors (MKIDs) to observe 100-GHz continuum with the Nobeyama 45-m telescope. A data acquisition (DAQ) system for the camera has been designed to operate the MKIDs with the telescope. This system is required to connect the telescope control system (COSMOS) to the readout system of the MKIDs (MKID DAQ) which employs the frequency-sweeping probe scheme. The DAQ system is also required to record the reference signal of the beam switching for the demodulation by the analysis pipeline in order to suppress the sky fluctuation. The system has to be able to merge and save all data acquired both by the camera and by the telescope, including the cryostat temperature and pressure and the telescope pointing. A collection of software which implements these functions and works as a TCP/IP server on a workstation was developed. The server accepts commands and observation scripts from COSMOS and then issues commands to MKID DAQ to configure and start data acquisition. We made a commissioning of the MKID camera on the Nobeyama 45-m telescope and obtained successful scan signals of the atmosphere and of the Moon.
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Acknowledgements
This work was supported by JSPS KAKENHI Grant Numbers JP25247022, JP26247019, and JP17H01115, and was achieved using the grant of Joint Development Research (FY2014, FY2017) supported by the Research Coordination Committee, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS). The Nobeyama 45-m radio telescope is operated by Nobeyama Radio Observatory, a branch of National Astronomical Observatory of Japan. The authors would like to thank the operation team of the Nobeyama 45-m radio telescope.
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Nagai, M., Hisamatsu, S., Zhai, G. et al. Data Acquisition System of Nobeyama MKID Camera. J Low Temp Phys 193, 585–592 (2018). https://doi.org/10.1007/s10909-018-1961-9
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DOI: https://doi.org/10.1007/s10909-018-1961-9