DESHIMA
(Deep Spectroscopic High-redshift Mapper)
(submillimeter spectrometer)
DESHIMA (for Deep Spectroscopic High-redshift Mapper) is a
Japanese/Netherlands submillimeter spectrometer installed on
the ASTE submillimeter telescope. (The
name DESHIMA was clearly inspired by inspired by the Japanese island,
Deshima aka Dejima, which historically served as a Japanese/Netherlands
trading port.) The spectrometer's frequency-range at first light
(2017) was 335-370 GHz, which allows detection of the ionized carbon fine structure line ([CII])
through a redshift-range of roughly z = 4.2 to 4.6. For sensitivity,
the appropriate portions of the instrument are cooled to 0.15
K. The technology is MKID-based filter banks.
DESHIMA 2.0 is an upgrade, installed in Fall of 2023, and
as of early 2024, is undergoing commissioning.
It covers a broader frequency-range (220-440 GHz), allowing detection
of the line through a redshift-range of z = 3.3 to 7.6.
The spectrometer is single-pixel, but a future multiple-pixel version
is planned.
(instrument,spectrometer,submillimeter)
Further reading:
http://deshima.ewi.tudelft.nl/
https://ui.adsabs.harvard.edu/abs/2020JLTP..199..231T/abstract
https://ui.adsabs.harvard.edu/abs/2012JLTP..167..341E/abstract
https://ui.adsabs.harvard.edu/abs/2022JLTP..209..278T/abstract
https://www.tudelft.nl/en/eemcs/current/science-stories/stories/the-deshima-guide-to-the-galaxy
https://endolab.tudelft.nl/deshima/
https://www.tudelft.nl/en/2019/ewi/dutch-japanese-astronomical-instrument-measures-49-shades-of-far-infrared
http://www2.nao.ac.jp/~eaarc/ALMAUM2021/contents/AkioTaniguchi.pdf
WaveL | Freq | Photon Energy | | |
810μm | 370GHz | 1.6meV | begin | DESHIMA |
895μm | 335GHz | 1.4meV | end | DESHIMA |
|
Index