GIMS Colloquium: CCD Cameras for Dark Energy Searches
Stephen Holland, Lawrence Berkeley National Laboratory
Javier Tiffenberg, Fermilab
American Physical Society,
Group on Instrumentation and Measurement Science (APS-GIMS)
Online colloquium
Friday, April 9, 2021, 3-4 pm Eastern time (rescheduled from March 12)
NOTE: This event was rescheduled from March 12 due to a time zone mixup.
MEETING LINK
Holland abstract: The development of fully depleted charge-coupled devices (CCDs) for scientific applications will be described in this presentation. The CCDs are fabricated on high-resistivity, float-zone refined silicon that allows for large depletion regions ranging from about 250 microns for astronomy applications up to the standard 150 mm wafer thickness of 650 microns for direct dark matter detection. The thick depletion regions result in an increase in the near-infrared quantum efficiency for imaging applications and increased volume for dark-matter detectors. Results from the Dark Energy Camera and the Dark Energy Spectroscopic Instrument will be presented.
Stephen E. Holland is a Senior Engineer at the Lawrence Berkeley National Laboratory. He received the Ph.D. degree in electrical engineering from the University of California, Berkeley in 1986. Since 1987 he has been with the Lawrence Berkeley National Laboratory. Dr. Holland is a member of the Institute of Electrical and Electronics Engineers and is a Fellow of the American Physical Society. He was awarded the IEEE Nuclear and Plasma Sciences Society Merit Award in 2001, received a Lifetime Achievement Award at the 2013 Scientific Detectors Workshop, and was the co-recipient of the APS Division of Particles and Fields Instrumentation Award in 2016.
Tiffenberg abstract: The Skipper Charge-Coupled Device (CCD) is a ground breaking technology that is opening unprecedented windows to the universe through the detection of single photons and electrons. The Skipper-CCD is able to make multiple non-destructive measurements of the pixel’s charge and use this information to reduce the readout noise to a negligible level. This technological leap opens a new path for the next generation of short baseline neutrino oscillation experiments and dark matter searches. Furthermore, it also has natural and immediate applications to imaging and spectroscopic instruments for astronomical, quantum physics and biomedical research.
Javier Tiffenberg is a Fermilab Associate Scientist working on experimental Dark Matter searches and neutrino detection. During the last four years, he dedicated most of his effort to developing and building the next generation of low-energy threshold particle detectors. He is the Co-spokesperson of the SENSEI Collaboration, a direct Dark Matter search experiment that is the first one to use the recently developed Skipper-CCD sensors. In 2020 he was awarded the New Horizons in Physics Prize by the Breakthrough Prize Board and the URA Early Career Award by the University Research Alliance. In 2018 he was awarded the DPF Instrumentation Early Career Award by the APS.
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