An audio podcast of Fermilab news, featuring physics results
Data from antipodal places: First use of CMB polarization to detect gravitational lensing from galaxy clusters
The camera on the South Pole Telescope measures minuscule fluctuations in the polarization of cosmic-microwave-background light across the southern sky. Photo: Jason Gallicchio, University of Chicago
In a study published in Physical Review Letters, Fermilab and University of Chicago scientist Brad Benson and colleagues use the polarization, or orientation, of the cosmic microwave background to calculate the masses of enormous galaxy clusters using a new mathematical estimator. This is the first time that scientists have measured these masses using the polarization of the CMB and the novel estimation method.
By Catherine N. Steffel. You can read the article at the Fermilab News web site.
Finding hidden neutrinos with MicroBooNE
The display shows the decay of a heavy neutrino as it would be measured in the MicroBooNE detector. Scientists use such simulations to understand what a signal in data would look like. Image: MicroBooNE collaboration
Neutrinos have baffled scientists for decades as their properties and behavior differ from those of other known elementary particles. Their masses, for example, are much smaller than the masses measured for any other elementary matter particle we know. They also carry no electric charge and interact only very rarely – through the weak force — with matter. At Fermilab, a chain of accelerators generates neutrino beams so researchers can study neutrino properties and understand their role in the formation of the universe.By Owen Goodwin, Davide Porzio, Stefan Söldner-Rembold and Yun-Tse Tsai .
You can read the entire article here, at the Fermilab News website.
It’s chilly here: Lowest temperature at Fermilab reached in equipment for dark matter experiment
Fermilab scientist Matt Hollister works on the world’s largest dry dilution fridge, which will be used for the SuperCDMS experiment at SNOLAB. Image: Reidar Hahn, Fermilab
After riding in a cage with nickel miners, walking down drifts and stopping at the dry, SuperCDMS scientists enter their shotcrete igloo of discovery deep underground.
Translating this out of mining lingo: After taking an elevator down a two-kilometer mineshaft with nickel miners, Fermilab scientists walk through nearly two more kilometers of tunnels and then shower and change before entering the white-walled cavern that will house the Super Cryogenic Dark Matter Search, an experiment that will look for dark matter particles with masses ranging from half to 10 times the mass of a proton.
By Catherine N. Steffel. You can read the entire article at the Fermilab News web site.
Expanding a neutrino hunt in the South Pole
The IceCube experiment in Antarctica.
Underneath the vast, frozen landscape of the South Pole lies IceCube, a gigantic observatory dedicated to finding ghostly subatomic particles called neutrinos. Neutrinos stream through the Earth from all directions, but they are lightweight, abundant and hardly interact with their surroundings.
The IceCube detector consists of an array of 86 strings festooned with more than 5000 sensors, like round, basketball-sized Christmas lights. They reach more than 2 kilometers (more than 1 mile) down through layers of Antarctic ice that have accumulated over hundreds of thousands of years.
By Diana Kwon. You can read the article at the Symmetry Magazine web site.
DUNE scientists win APS Early Career Instrumentation Award
Ana Amelia Machado
The American Physical Society (APS) Division of Particles and Fields has given its 2019 Early Career Instrumentation Award to two scientists on the international Deep Underground Neutrino Experiment (DUNE), hosted by Fermilab.
You can read this brief article at the Fermilab News website.
High-resolution MicroBooNE detector provides new details in neutrino-argon interaction measurement
A neutrino candidate event selected by this analysis is shown as a bird’s-eye view of the MicroBooNE detector. In this view, neutrinos arrive from the left. The five prongs show five particles that have been produced by a neutrino interaction with an argon atom. The longest prong is the candidate muon, going backwards with respect to the neutrino direction.
The most recent physics result from the MicroBooNE experiment provides one of the very first rigorous tests of our understanding of neutrino interactions with argon. The paper, published in Physical Review Letters, presents the first ever measurement of neutrino interactions on argon as a function of the momentum and angle of the muon, a particle produced in the interaction (technically called a “double-differential cross section measurement”).
By Anne Schukraft and Marco Del Tutto. You can read the article here.
Customer ReviewsSee All
I enjoy following developments at Fermi lab through these brief snippets. Although I'm (sadly) not a particle physicist and (also sadly) live far from Chicago, you keep me in touch with real science. Keep up the great work Dr. Elliot!!
Incredible information and well done! The only thing I would change is the speed of delivery - some of us are slower listeners and really want to understand clearly.
Keep up the good work!
Please include slides
Could you please include the diagrams and pictures which are referenced in the talks on iTunes? Or a pointer to the slides?