On May 17th, 2022 at 4.30 pm Dr. Stephan Friedrich, Lawrence Livermore National Laboratory, will hold an on line seminar titled "Cryogenic Radiation Detectors".

Cryogenic radiation detectors with operating temperatures below 0.1 K are being developed because they offer significantly higher energy resolution than conventional detectors. Over the last four decades, different technologies have been developed for applications from astronomy and particle physics to material and nuclear science, and detectors have been optimized for photons from microwaves to gamma-rays and for particles from alphas to hypothetical dark matter. Many of these detectors are based on the unique properties of superconducting materials. This lecture will briefly introduce the properties of superconductors that are relevant for high-resolution radiation detection. It will then provide an overview of the main two classes of superconducting detectors: Non-equilibrium charge detectors, which tend to be faster but small and therefore only used at lower energies, and thermal equilibrium detectors, which can be bigger and therefore be used for higher-energy radiation but tend to be slower. Finally, I will discuss the use cryogenic radiation detectors in different fields of science to illustrate the wide range of applications they enable.

Dr. Friedrich leads the development of cryogenic X-ray, gamma-ray and particle detectors with ultrahigh energy resolution at Lawrence Livermore National Laboratory (LLNL). He received his Ph.D. in Applied Physics from Yale University in 1997 with a dissertation on superconducting X-ray detectors for high-energy astrophysics. He then adapted these detectors for high-resolution X-ray spectroscopy of metalloproteins and novel materials at the ALS synchrotron at Lawrence Berkeley Laboratory (LBL). Since 2002, he has also developed cryogenic high-resolution gamma detectors, most recently using magnetic microcalorimeters for nuclear safeguards and nuclear data applications. He is also the Chief Scientists of the BeEST sterile neutrino dark matter search. Dr. Friedrich has received two R&D100 awards for the commercialization of superconducting detectors and has authored over 150 publications on cryogenic detectors and their applications in material science, biophysics, nuclear physics and national security.

The event is aimed at all, including students and PhD students.

The event will take place in live streaming by Zoom
ID riunione: 964 1944 8829, Passcode: 293320