Survey delivers on dark energy with multiple probes

Published on: September 25, 2019
Researchers used the Blanco telescope in conducting the Dark Energy Survey. The Milky Way is on the left of the sky, with the Magellanic clouds in the center. Photo: Reidar Hahn

Why is our universe accelerating in its expansion? If Einstein’s theory of general relativity is correct, then the dark energy that drives this expansion accounts for nearly 70% of the total energy in the universe. However, precise measurements of the history of this expansion may reveal that new dynamic forces are in play. The Dark Energy Survey has combined its four primary cosmological probes for the first time in order to constrain the properties of dark energy. These first combined constraints are competitive with previous experiments and will improve as more data is analyzed.

By  Michael Troxel. You can read the article at Fermilab’s web site.

An interaction of slipping beams

Published on: September 18, 2019
A new method improves the circulating beams in the Recycler Ring (located beneath the ponds shown here), a major component of Fermilab’s accelerator chain. Photo: Reidar Hahn

Burov summarize the results of a study in which he instabilities in high intensity particle beams and concluded that a special feedback would make the beams much more stable. The required feedback was then designed and implemented by Nathan Eddy and his Fermilab team. The result was a 20% increase in proton beam intensity and a reduction in beam loss by a factor of 2.

By Alexey Burov. You can read the article at the Fermilab News site.

CMS upgrades take a big step

Categories: CMS/LHC
Published on: September 11, 2019
Maral Alyari, SUNY-Buffalo, and Stephanie Timpone, Fermilab, work on the forward pixel detector at SiDet in 2015. Photo: Reidar Hahn

“Complete the LHC Phase 1 Upgrades….” is how the first project-specific and concrete recommendation (Recommendation 10) of the 2014 Report of the Particle Physics Project Prioritization Panel (P5), “Building for Discovery,” starts. This short phrase has been the mission statement for U.S. CMS scientists from Fermilab and around 30 U.S. institutes for the last six years. On May 1, with the successful outcome of the Department of Energy Critical Decision 4 review, the project has been completed.

By Steve Nahn. You can read the entire article at the Fermilab News site.

CMS publication count climbs to 900!

Categories: CMS/LHC
Published on: September 4, 2019
The author, Boaz Klima.

The CMS collaboration reached a major milestone last week by submitting for publication its 900th paper. As you can see in CMS’ publications website, starting in early 2010, CMS has been publishing about 100 papers every year on physics analyses using LHC collision data. The publications timeline of the 880 collider-data papers, split by physics topics, is available online.

By Boaz Klima. You can read the article at the Fermilab News Site.

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