Dark Matter day is just around the corner

Categories: Cosmic Frontier
Published on: October 29, 2019
Check out the Dark Matter Day website for an event near you on Oct. 31.

Fermilab is celebrating Dark Matter Day with a Facebook Live event — underground! On Thursday, Oct. 31, at 10 a.m. CT, visit Fermilab’s Facebook page to hear our scientists chat about their exciting dark matter investigations from one of Fermilab’s underground experimental halls.

By the Interactions collaboration. You can read this press release at the Fermilab News site.

Under pressure: balloons for particle acceleration

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Published on: October 23, 2019
Fermilab engineers Mohamed Hassan, left, and Donato Passarelli stand near an accelerator cavity and the patented balloons used to tune, or reshape, the cavity from the inside. Photo: Reidar Hahn

“Mohamed and Donato developed a truly beautiful method and apparatus to tune dressed cavities,” said Aaron Sauers, the lab’s patent and licensing executive. “I was excited to file the patent application on their invention.”

Hassan and Passarelli see automated balloon tuning as a possibility, which could make it as convenient to use as the current method is for unjacketed cavities. The technique may also find applications in other fields that use similar cavities.

“The hope is that people looking at this idea will get inspired and either adapt or use this technique in their own application,” Passarelli said.

By Bailey Bedford. You can read the article here, at the Fermilab news web site.

Fermilab achieves world-record field strength for accelerator magnet

Published on: October 18, 2019
Fermilab recently achieved a magnetic field strength of 14.1 teslas at 4.5 kelvins on an accelerator steering magnet — a world record. Photo: Thomas Strauss

“This is a tremendous achievement in a key enabling technology for circular colliders beyond the LHC,” said Soren Prestemon, a senior scientist at Berkeley Lab and director of the multilaboratory U.S. Magnet Development Program, which includes the Fermilab team. “This is an exceptional milestone for the international community that develops these magnets, and the result has been enthusiastically received by researchers who will use the beams from a future collider to push forward the frontiers of high-energy physics.”

By Leah Hesla. You can read the article at the Fermilab web site, here.

Theorists discover the “Rosetta Stone” for neutrino physics

Categories: Intensity Frontier
Published on: October 9, 2019
From left: Xining Zhang of the University of Chicago, Peter Denton of Brookhaven National Laboratory and Stephen Parke of Fermilab have discovered a new mathematical identity that had eluded mathematicians for centuries. Photo: Reidar Hahn

The physics usage case of this result stems from our investigations of neutrino oscillation probabilities in matter, which involve finding eigenvectors and eigenvalues, both of which are rather complicated expressions. While the eigenvalues are somewhat unavoidably tricky, this new result shows that the eigenvectors can be written down in a simple, compact, and easy-to-remember form, once the eigenvalues are calculated. For this reason, we called the eigenvalues “the Rosetta Stone” for neutrino oscillations in our original publication — once you have them, you know everything you want to know.

By Stephen Parke. You can read this article at the Fermilab web site.

Finding the missing pieces of a puzzle of an antineutrino’s energy

Categories: Intensity Frontier
Published on: October 2, 2019
This graphic illustrates a neutrino interaction in the MINERvA detector. The rectangular box highlights the spot where a neutrino interacted inside the detector. The square box just above it highlights the appearance of a neutron resulting from the neutrino interaction. Image: MINERvA

Charged particles, like protons and electrons, can be characterized by the trails of atoms these particles ionize. In contrast, neutrinos and their antiparticle partners almost never ionize atoms, so their interactions have to be pieced together by how they break nuclei apart.

But when the breakup produces a neutron, it can silently carry away a critical piece of information: some of the antineutrino’s energy.

By  Andrew Olivier. You can read this article here, at the Fermilab News web site.

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