191221 High-Density Ultra-Sensitive Cameras for Future Cosmic Microwave Background Observations

Title:
High-Density Ultra-Sensitive Cameras for Future Cosmic Microwave Background Observations

Speaker:
何率菩 (Shuay-Pwu Patty Ho), PhD, Princeton University

Time:
12/21 (Sat.) 5:30 pm PST, 6:30 pm MST, 7:30 pm CST, 8:30 pm EST
12/22 (Sun.) 9:30 am Taiwan

Keywords:
Physics, Experimental cosmology, CMB, Bolometers, Polarimeter, ACT, SO

Abstract:

The cosmic microwave background (CMB) continues to reveal new aspects of the large scale universe. For example, current projects are searching for evidence of primordial gravitational waves, for signatures sensitive to the sum of the neutrino masses, and for further understanding of the formation and growth of large structures under the influence of gravity in the accelerating universe. Technologies for ground-based and balloon-borne instruments measuring the polarization of the CMB have been well established and advanced in the last decade.

In this talk, I will focus on the instrumentation on these state-of-the-art arrays, especially on ACTPol, Advanced ACTPol and future stage-3 and stage-4 experiments.

191214 Kinetic Inductance Detector for Next Generation Dark Matter Search

Title:
Kinetic Inductance Detector for Next Generation Dark Matter Search

Speaker:
張硯詠 (Yen-Yung Chang), PhD candidate, Caltech

Time:
12/14 (Sat.) 5 pm PST, 6 pm MST, 7 pm CST, 8 pm EST
12/15 (Sun.) 9 am Taiwan

Keywords:
Physics, High energy physics, Dark matter, Kinetic Inductance Detector (KID), SuperCDMS

Abstract:

In recent years, development in dark matter (DM) phenomenology below GeV scale has been booming, partially due to the null results from collider and noble liquid-based searches, and partially thanks to new technologies' sensitivity in previously unreachable territory.

I will begin with the rich phenomenology in low-mass, i.e. sub-GeV to wave-like, DM candidates and discuss SuperCDMS single-electron-hole-sensitive detector and its latest result. And then I will focus the rest of the talk on the ongoing R&D with Kinetic Inductance Detector (KID) at Caltech and NASA-JAP as a promising alternative to current technologies, e.g. transition edge sensor (TES), for future larger scale, low-threshold DM searches.