Speaker
Dr
Yuan Mei
(LBNL)
Description
By leveraging industrial standard CMOS integrated circuit process, we create sensors that directly collect charge in the form of electrons and ions and that work at extremely low temperatures. I'll first introduce a series of sensors called Topmetal that are geared towards measuring charge in gas and liquid media. $80\mu$m pixel pitch and 15$e^{-}$ electronic noise have been demonstrated. Sensor arrays are being developed for neutrinoless double-beta decay search in high-pressure gas such as SeF$_6$ (ion-only mode) and the imaging of x-rays, gamma-rays, and neutrons.
I'll also introduce the recent pursuit of CMOS circuitry that can operate below 1 Kelvin. The rapid increase in the scale of deep cryogenic instruments such as CUPID (CUORE Upgrade with Particle ID) for neutrinoless double-beta decay, transition edge sensor for microwave (CMB), and superconducting quantum computer demand a high channel-density solution for readout and control. By placing CMOS ASIC to a colder stage thus closer to the sensors, one could achieve higher system density, lower noise, and shorter feedback path. Early CMOS device characterization at such temperature and future plans will be presented.
Primary author
Dr
Yuan Mei
(LBNL)
