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In July Prof. Shailesh Chandrasekharan and postdoctoral associate Dr. Anyi Li traveled to Squaw Valley, Lake Tahoe to attend 2011 International Symposium on Lattice Field Theory. It is the biggest annual meeting for all the people who are doing lattice field theory calculations. 350 participants from all over the world have attended this year's conference. Prof. Chandrasekharan and Dr. Li presented their work on the novel developed algorithm which can efficiently simulate the fermionic system at chiral limit. It is believed that the conventional approach would fail at that limit. Their approach has been well received by the audiences and raised lots of interesting questions and discussions. The new algorithm has promising applications on the physics of graphene and unitary fermi gas. They have started implementing the calculations on those problems.
Submitted by: Dr. Anyi Li
Chandrasekharan and Li attend Lattice Field Theory Symposium
One fourth of the CMS Forward Pixel detector. This section has about 1000 readout chips, each with about 4000 pixels. So the entire forward pixel detector has about 18 million pixels. There are another 48 million pixels in the barrel section (not shown here). So it is somewhat similar to a 66MP digital camera, except that we take 40 million pictures every second!
Tenuous Link: chipped->chips
TRIUMF Laboratory, Canada
Credit: Michael Lawrence
A view of a liquid nitrogen dewar; lots of this pressurized gas is used to keep things cool.
Prof. Steffen Bass completed a whirlwind tour of South Korea recently. He gave a Colloqium at Andong National University, seminars at POSTECH and at Yonsei University and the keynote talk at the HIM Conference on Heavy-Ion Physics.
Photo by: Prof. Steffen Bass
TRIUMF Laboratory, Canada
Credit: Julie Ferguson
As liquid nitrogen is used to cool physics experiments, some pressure relief causes condensation of water in the air, allowing ice to form and crystallize as snow covering.
I wanted to get a picture of the end of the accelerator feeding the Muon g-2 experiment. The beam pipe comes in from the left and goes through the red quadrupole magnets before merging with the pipe that runs inside the main storage ring (blue) just to the right of the frame. The beam pipe is partially obscured by some other pipe in the foreground that ends above the "Notice: Argon Ethane" sign. I'm not sure what that's about, although after looking it up (arxiv.org/abs/1701.02807) I see that they monitor muon losses from the ring with a straw tracker, which might be using an argon ethane mixture as an ionization gas.
A Wilson cloud chamber is basically a tank of condensed, supercooled water (or alcohol) vapour. It is used to detect high energy particles - ionizing radiation. The radiation, say from cosmic rays, or radioactivity, or particle accelerators and so forth, leave their distinctive trails in the "clouds". Because of conservation laws (conservation of angular momentum, and conservation of charge, in particular) you get these wonderful spiralling trails. If you look carefully, there's a whole lot of symmetries in the image. In fact, if you look really carefully and measure angles, it's possible to get the mass to charge ratio of the particle in question. It's really a magic piece of 20th century science instrumentation.
This is a two colour screenprint I made of clouds and ionization tracks in a cloud chamber.
2015 Photo Walk @ Fermilab. These are some of the 280 detector panels to find neutrinos for MINOS project 330 feet underground in Fermilab, Illinois, USA.
at CDF: Trailer 144-A, right there at the end.
Some more bikes, for Josh.
Backstory: at most particle physics experiments space is at a premium. And physicists don't care where they sit: we have a high tolerance for low style and comfort. so the trailer cum office is a staple, at least in US HEP labs.
I don't know what the actual purpose of these devices is. Fermi National Accelerator Laboratory, Batavia, IL
Gene Flanagan, John Freeman, Sasha Pronko and Vadim Rusu are the authors of a recent observation of diboson decays at the Tevatron. Read it on the arxiv.
They work on the CDF experiment.
Early data taking at the CMS experiment at CERN's LHC.
Anders and Tiziano conferring about what to do. Tiziano is the Run Coordinator and Anders is the Run Field Manager.
Early data taking at the CMS experiment at CERN's LHC.
Vladimir Rekovic, looking excited to be there.