TSI Seminar Series

Akira Endo (Delft University of Technology)

Jan 13, 2026 3:30 PM

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Location: Bell Room (Rutherford 103)
TSI Seminar

The next challenge in mm-submm astronomy is to generate 3D maps of statistically large cosmic volumes with complete spectral information, to uncover the history of cold matter back to the first billion years of the Universe, the evolution of hot matter in galaxy clusters, and the emergence of cosmic large-scale structure from those baryonic materials. Vital for this endeavor is the integral field unit (IFU), which is a 2D array of spectrometers that instantaneously measures the spectrum of all points in the image. The IFU has reshaped astronomy at shorter visible wavelengths, but it is still in its early stages for mm-submm waves. Here I will preent the development of two instruments based on the on-chip filterbank spectrometer technology. The first instrument DESHIMA (Deep Spectroscopic High-redshift Mapper) is a single-spaxel ultra-wideband spectrometer that instantaneously covers the 200-400 GHz band with photon-noise limited sensitivity. After a successful first-light demonstration of the technology in 2017 and a number of technological improvements since then, we have conducted a commissioning and science verification campaign of DESHIMA 2.0 on the ASTE 10-m telescope in 2024. In parallel to DESHIMA, we have begun the development of a 100-fold upscaled instrument system TIFUUN (THz Integral Field Unit with Universal Nanotechnology), which will host two superconducting circuit-based IFUs of up to 61 spaxels for instantaneous 3D mapping of the mm-submm cosmos. The goal of TIFUUN is to map the cosmic large scale structure with multiple mm-submm probes, including line-emitting galaxies, line-intensity mapping, and the Sunyaev–Zeldovich effect.