From DESHIMA to TIFUUN
Akira Endo
Delft University of Technology

The next challenge in mm-submm astronomy is to generate 3D maps ofstatistically large cosmic volumes with complete spectral information, touncover the history of cold matter back to the first billion years of theUniverse, the evolution of hot matter in galaxy clusters, and the emergenceof cosmic large-scale structure from those baryonic materials. Vital forthis endeavor is the integral field unit (IFU), which is a 2D array ofspectrometers that instantaneously measures the spectrum of all points inthe 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-chipfilterbank spectrometer technology. The first instrument DESHIMA (DeepSpectroscopic High-redshift Mapper) is a single-spaxel ultra-widebandspectrometer that instantaneously covers the 200-400 GHz band withphoton-noise limited sensitivity. After a successful first-lightdemonstration of the technology in 2017 and a number of technologicalimprovements since then, we have conducted a commissioning and scienceverification 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-foldupscaled instrument system TIFUUN (THz Integral Field Unit with UniversalNanotechnology), which will host two superconducting circuit-based IFUs ofup to 61 spaxels for instantaneous 3D mapping of the mm-submm cosmos. Thegoal of TIFUUN is to map the cosmic large scale structure with multiplemm-submm probes, including line-emitting galaxies, line-intensity mapping,and the Sunyaev�EUR"Zeldovich effect.

Date:	Mardi, 13 janvier 2026
Time:	15:30
Where:	McGill University
	Ernest Rutherford Physics, R.E. Bell Conference Room (room 103)