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  • richardmitnick 3:09 pm on June 24, 2017 Permalink | Reply
    Tags: , CERN ProtoDUNE, , FNAL MicroBooNE, , ,   

    From Symmetry: “World’s biggest neutrino experiment moves one step closer” 

    Symmetry Mag

    Symmetry

    06/23/17
    Lauren Biron

    1
    Photo by Maximilien Brice, CERN

    The startup of a 25-ton test detector at CERN advances technology for the Deep Underground Neutrino Experiment.

    FNAL LBNF/DUNE from FNAL to SURF, Lead, South Dakota, USA


    FNAL DUNE Argon tank at SURF


    Surf-Dune/LBNF Caverns at Sanford



    SURF building in Lead SD USA

    In a lab at CERN sits a very important box. It covers about three parking spaces and is more than a story tall. Sitting inside is a metal device that tracks energetic cosmic particles.

    CERN Proto DUNE Maximillian Brice

    This is a prototype detector, a stepping-stone on the way to the future Deep Underground Neutrino Experiment (DUNE). On June 21, it recorded its first particle tracks.

    So begins the largest ever test of an extremely precise method for measuring elusive particles called neutrinos, which may hold the key to why our universe looks the way it does and how it came into being.

    A two-phase detector

    The prototype detector is named WA105 3x1x1 (its dimensions in meters) and holds five active tons—3000 liters—of liquid argon. Argon is well suited to interacting with neutrinos then transmitting the subsequent light and electrons for collection. Previous liquid argon neutrino detectors, such as ICARUS and MicroBooNE, detected signals from neutrinos using wires in the liquid argon. But crucially, this new test detector also holds a small amount of gaseous argon, earning it the special status of a two-phase detector.

    INFN Gran Sasso ICARUS, since moved to FNAL

    FNAL/ICARUS

    FNAL/MicrobooNE

    As particles pass through the detector, they interact with the argon atoms inside. Electrons are stripped off of atoms and drift through the liquid toward an “extraction grid,” which kicks them into the gas. There, large electron multipliers create a cascade of electrons, leading to a stronger signal that scientists can use to reconstruct the particle track in 3D. Previous tests of this method were conducted in small detectors using about 250 active liters of liquid argon.

    “This is the first time anyone will demonstrate this technology at this scale,” says Sebastien Murphy, who led the construction of the detector at CERN.

    The 3x1x1 test detector represents a big jump in size compared to previous experiments, but it’s small compared to the end goal of DUNE, which will hold 40,000 active tons of liquid argon. Scientists say they will take what they learn and apply it (and some of the actual electronic components) to next-generation single- and dual-phase prototypes, called ProtoDUNE.

    The technology used for both types of detectors is a time projection chamber, or TPC. DUNE will stack many large modules snugly together like LEGO blocks to create enormous DUNE detectors, which will catch neutrinos a mile underground at Sanford Underground Research Facility in South Dakota. Overall development for liquid argon TPCs has been going on for close to 40 years, and research and development for the dual-phase for more than a decade. The idea for this particular dual-phase test detector came in 2013.

    “The main goal [with WA105 3x1x1] is to demonstrate that we can amplify charges in liquid argon detectors on the same large scale as we do in standard gaseous TPCs,” Murphy says.

    By studying neutrinos and antineutrinos that travel 800 miles through the Earth from the US Department of Energy’s Fermi National Accelerator Laboratory [FNAL] to the DUNE detectors, scientists aim to discover differences in the behavior of matter and antimatter. This could point the way toward explaining the abundance of matter over antimatter in the universe. The supersensitive detectors will also be able to capture neutrinos from exploding stars (supernovae), unveiling the formation of neutron stars and black holes. In addition, they allow scientists to hunt for a rare phenomenon called proton decay.

    “All the R&D we did for so many years and now want to do with ProtoDUNE is the homework we have to do,” says André Rubbia, the spokesperson for the WA105 3x1x1 experiment and former co-spokesperson for DUNE. “Ultimately, we are all extremely excited by the discovery potential of DUNE itself.”

    2
    One of the first tracks in the prototype detector, caused by a cosmic ray. André Rubbia

    Testing, testing, 3-1-1, check, check

    Making sure a dual-phase detector and its electronics work at cryogenic temperatures of minus 184 degrees Celsius (minus 300 degrees Fahrenheit) on a large scale is the primary duty of the prototype detector—but certainly not its only one. The membrane that surrounds the liquid argon and keeps it from spilling out will also undergo a rigorous test. Special cryogenic cameras look for any hot spots where the liquid argon is predisposed to boiling away and might cause voltage breakdowns near electronics.

    After many months of hard work, the cryogenic team and those working on the CERN neutrino platform have already successfully corrected issues with the cryostat, resulting in a stable level of incredibly pure liquid argon. The liquid argon has to be pristine and its level just below the large electron multipliers so that the electrons from the liquid will make it into the gaseous argon.

    “Adding components to a detector is never trivial, because you’re adding impurities such as water molecules and even dust,” says Laura Manenti, a research associate at the University College London in the UK. “That is why the liquid argon in the 311—and soon to come ProtoDUNEs—has to be recirculated and purified constantly.”

    While ultimately the full-scale DUNE detectors will sit in the most intense neutrino beam in the world, scientists are testing the WA105 3x1x1 components using muons from cosmic rays, high-energy particles arriving from space. These efforts are supported by many groups, including the Department of Energy’s Office of Science.

    The plan is now to run the experiment, gather as much data as possible, and then move on to even bigger territory.

    “The prospect of starting DUNE is very exciting, and we have to deliver the best possible detector,” Rubbia says. “One step at a time, we’re climbing a large mountain. We’re not at the top of Everest yet, but we’re reaching the first chalet.”

    See the full article here .

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    Symmetry is a joint Fermilab/SLAC publication.


     
  • richardmitnick 2:06 pm on February 16, 2017 Permalink | Reply
    Tags: , FNAL MicroBooNE, LC Collaboration, Pandora tookit   

    From LC Newsline: “Pandora: opening the box for neutrino experiments” 

    Linear Collider Collaboration header
    Linear Collider Collaboration

    16 February 2017
    Barbara Warmbein

    1
    First neutrino event candidates identified by MicoBooNE. The image shows the raw data with some low-level processing and represent the input to the hit finding and particle flow reconstruction (i.e. pattern recognition) phases

    Pattern recognition rules in particle physics. When particles collide, many things happen at the same time and in a very fast sequence within fractions of a second. In order to tell everyday events from rare ones, particle physicists use pattern recognition software to quickly scan and classify pictures from the collisions.

    A software development kit and event reconstruction system called Pandora has been helping detector developers design and run pattern recognition algorithms since 2009. Under the AIDA-2020 project Pandora has been enhanced for use in a new project: the liquid-argon time projection chamber for the MicroBooNE neutrino experiment based at Fermilab in the United States.

    FNAL/MicrobooNE
    FNAL/MicrobooNE

    Pandora was originally developed for tracking particles through calorimeters being designed for the ILC and later the Compact Linear Collider (CLIC).

    CERN CLIC

    clic-colllider-annotated
    CLIC Collider annotated

    The toolkit was the first to manage the particle flow challenge set by linear-collider physicists: to track and identify every single particle from a collision throughout the whole detector.

    Pandora uses a multi-algorithm approach to pattern recognition, in which many small algorithms gradually build up a picture of events. Each algorithm specialises in a specific characteristic or event topology. For the MicroBooNE experiment, Pandora now provides a fully automated reconstruction of neutrino and cosmic-ray events in a very different detector environment to that of the linear collider.

    For MicroBooNE, three separate two-dimensional images per event need to be checked by pattern recognition to finally arrive at a three-dimensional representation of the event. This can be tricky, explains John Marshall, one of the Pandora project leaders: “Features are routinely hidden in at least one view when, for example, two tracks lie on top of one another when viewed from a particular angle. Our new algorithms have a sophisticated interplay between 2D and 3D reconstruction, with iterative corrections made to the 2D reconstruction if features do not correspond between the three “views” of the event.” Pandora thus learns from its own algorithms.

    In the end, the neutrino interactions can be seen in amazing detail. “They are intrinsically very complicated and frequently difficult to reconstruct,” says Marshall.

    “The human brain and eye can normally do a very good job at separating the different particles in the images, but sometimes it’s not easy, even for a human!”

    The MicroBooNE detector consists of a time projection chamber filled with liquid argon. When neutrinos generated from a proton beam at Fermilab pass through the dense liquid, they interact with argon nuclei and create an avalanche of secondary particles that ionise electrons in the liquid-argon volume, which then drift to three wire planes at the TPC’s anode. It’s these three planes that deliver the three different two-dimensional images that Pandora helps reconstruct.

    Interesting events are used to develop the toolkit further. “In-Pandora visualisation tools allow relevant clusters to be displayed and colour-coded, markers can be added to indicate feature points, lines added to indicate straight-line fits, etc.” explains John Marshall. “This visual approach greatly aids algorithm development. Once an algorithm has been developed in the context of a few events, testing starts to be scaled-up to large event samples. Pandora provides a lot of internal error checking, so any mistakes in algorithm logic are normally identified and highlighted very quickly.”

    Pattern recognition is likely to become even more important in the future as images of collisions become more and more detailed with improving detector technologies.

    See the full article here .

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    The Linear Collider Collaboration is an organisation that brings the two most likely candidates, the Compact Linear Collider Study (CLIC) and the International Liner Collider (ILC), together under one roof. Headed by former LHC Project Manager Lyn Evans, it strives to coordinate the research and development work that is being done for accelerators and detectors around the world and to take the project linear collider to the next step: a decision that it will be built, and where.

    Some 2000 scientists – particle physicists, accelerator physicists, engineers – are involved in the ILC or in CLIC, and often in both projects. They work on state-of-the-art detector technologies, new acceleration techniques, the civil engineering aspect of building a straight tunnel of at least 30 kilometres in length, a reliable cost estimate and many more aspects that projects of this scale require. The Linear Collider Collaboration ensures that synergies between the two friendly competitors are used to the maximum.

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  • richardmitnick 7:40 am on November 3, 2015 Permalink | Reply
    Tags: , FNAL MicroBooNE,   

    From FNAL: “MicroBooNE sees first accelerator-born neutrinos” 

    FNAL II photo

    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Nov. 2, 2015
    Chris Patrick

    1
    This display shows a neutrino event candidate in the MicroBooNE detector. Image: MicroBooNE

    Today the MicroBooNE collaboration announced that it has seen its first neutrinos in the experiment’s newly built detector.

    FNAL Microboone
    Microboone Detector

    “It’s nine years since we proposed, designed, built, assembled and commissioned this experiment,” said Bonnie Fleming, MicroBooNE co-spokesperson and a professor of physics at Yale University. “That kind of investment makes seeing first neutrinos incredible.”

    After months of hard work and improvements by the Fermilab Booster team, on Oct. 15, the Fermilab accelerator complex began delivering protons, which are used to make neutrinos, to one of the laboratory’s newest neutrino experiments, MicroBooNE. After the beam was turned on, scientists analyzed the data recorded by MicroBooNE’s particle detector to find evidence of its first neutrino interactions.

    “This was a big team effort,” said Anne Schukraft, Fermilab postdoc working on MicroBooNE. “More than 100 people have been working very hard to make this happen. It’s exciting to see the first neutrinos.”

    MicroBooNE’s detector is a liquid-argon time projection chamber. It resembles a silo lying on its side, but instead of grain, it’s filled with 170 tons of liquid argon.

    Liquid argon is 40 percent denser than water, and hence neutrinos are more likely to interact with it. When an accelerator-born neutrino hits the nucleus of an argon atom in the detector, its collision creates a spray of subatomic particle debris. Tracking these particles allows scientists to reveal the type and properties of the neutrino that produced them.

    Neutrinos have recently received quite a bit of media attention. The 2015 Nobel Prize in physics was awarded for neutrino oscillations, a phenomenon that is of great importance to the field of elementary particle physics. Intense activity is under way worldwide to capture neutrinos and examine their behavior of transforming from one type into another.

    MicroBooNE is an example of a new liquid-argon detector being developed to further probe this phenomenon while reconstructing the particle tracks emerging from neutrino collisions as finely detailed three-dimensional images. Its findings will be relevant for the forthcoming Deep Underground Neutrino Experiment, known as DUNE, which plans to examine neutrino transitions over longer distances and a much broader energy range. Scientists are also using MicroBooNE as an R&D platform for the large DUNE liquid-argon detectors.

    FNAL Dune & LBNF
    DUNE

    “Future neutrino experiments will use this technology,” said Sam Zeller, Fermilab physicist and MicroBooNE co-spokesperson. “We’re learning a lot from this detector. It’s important not just for us, but for the entire neutrino community.”

    In August, MicroBooNE saw its first cosmic ray events, recording the tracks of cosmic ray muons. The recent neutrino sighting brings MicroBooNE researchers much closer to one of their scientific goals, determining whether the excess of low-energy events observed in a previous Fermilab experiment was the footprint of a sterile neutrino or a new type of background.

    Before they can do that, however, MicroBooNE will have to collect data for several years.

    During this time, MicroBooNE will also be the first liquid-argon detector to measure neutrino interactions from a beam of such low energy. At less than 800 MeV (megaelectronvolts), this beam produces the lowest-energy neutrinos yet to be observed with a liquid-argon detector.

    MicroBooNE is part of Fermilab’s Short-Baseline Neutrino program, and scientists will eventually add two more detectors (ICARUS and the Short-Baseline Near Detector) to its neutrino beamline.

    FNAL ICARUS
    ICARUS

    See the full article here .

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    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics. Fermilab is America’s premier laboratory for particle physics and accelerator research, funded by the U.S. Department of Energy. Thousands of scientists from universities and laboratories around the world
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  • richardmitnick 4:52 pm on October 23, 2014 Permalink | Reply
    Tags: , FNAL MicroBooNE,   

    From FNAL: “UV laser calibration system installed in MicroBooNE” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Thursday, Oct. 23, 2014
    Rich Blaustein

    Fermilab’s MicroBooNE experiment, expected to launch in early 2015, could very well help determine whether a hypothesized fourth neutrino — referred to as a sterile neutrino — would join the three confirmed ones. Anticipating significant, perhaps momentous, findings, Fermilab and outside collaborators are working hard to ready MicroBooNE for take-off.

    In late September, MicroBooNE collaborators installed a new ultraviolet (UV) laser calibration system in MicroBooNE’s liquid-argon detector at Fermilab. Scientists at Switzerland’s University of Bern Laboratory for High Energy Physics, a MicroBooNE collaborator, designed and built the system specifically for the project.

    two
    Antonio Ereditato (left), head of the Laboratory for High Energy Physics at the University of Bern, and scientist Thomas Strauss, also of the University of Bern, work on MicroBooNE’s UV laser calibration system. Photo: Reidar Hahn

    “This is exciting,” said Fermilab’s Sam Zeller, MicroBooNE co-spokesperson. “This is the first time anyone has deployed such a laser system in a liquid-argon detector for a major neutrino experiment.”

    Fermilab’s MiniBooNE experiment (MicroBooNE’s predecessor) and Los Alamos National Laboratory’s Liquid Scintillator Neutrino Detector experiment raised the possibility of a fourth neutrino. However, the two experiments, while producing many cited — and some differing — results, did not have sensitive liquid-argon detectors for charting neutrino activity.

    “We are recreating that same short-beamline environment, but with MicroBooNE, which has a more capable detector,” said University of Bern’s Michele Weber, MicroBooNE physics analysis coordinator. “We now have some means to address this new neutrino question.”

    Because of the high-resolution imaging capability of liquid-argon detectors such as MicroBooNE’s, it is important to ensure and monitor their correct functioning. One of the calibration system’s goals is to check the detector’s electric field and how it transfers deposits of charge, caused by neutrino interactions with the liquid argon, to the detector’s readout wires.

    With the University of Bern’s UV laser calibration system, ultraviolet laser beams, which are reliably straight, are shot through the argon-filled chamber when the neutrino beam is not activated to test whether the detector’s critical components — wiring, electrical field — are operating maximally or are skewing data readings.

    Physicist Antonio Ereditato, who heads the University of Bern laboratory, explains that a normal visible-light laser does not have enough energy to ionize the liquid argon and create tracks similar to those caused by the neutrinos. But a laser using ultraviolet light, which is higher in energy than visible light, can do the job under specific conditions.

    “The system creates ‘artificial’ tracks that mimic the ionization tracks left by particles. In short, this ultraviolet laser system checks, monitors and calibrates the liquid-argon detector,” Ereditato said.

    “That allows us to measure possible image distortions everywhere,” Weber said. Those distortions can then be accounted for in the data.

    The laser calibration system took eight years of R&D studies to develop. The Bern team also tested it on a liquid-argon detector prototype at their lab.

    “I always joke with the Bern team that the calibration system they built is like a Swiss watch,” Zeller said. “The laser itself, like exquisite clockwork, sweeps across the detector. It is absolutely beautiful.”

    Ereditato and Weber are also very happy with the system. They feel the MicroBooNE experiment embodies the international cooperation and goodwill that bodes well for the future of particle physics.

    “This experiment, which we worked so hard on, and Fermilab’s opening their doors and recognizing our work is very satisfying,” Weber said.

    “If there is another neutrino, it could open up an entirely new particle family — so there is some exciting physics possibly around the corner,” Zeller said. “We are ready to get going.”

    See the full article here.

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    Fermi National Accelerator Laboratory (Fermilab), located just outside Batavia, Illinois, near Chicago, is a US Department of Energy national laboratory specializing in high-energy particle physics.

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  • richardmitnick 11:19 am on January 7, 2014 Permalink | Reply
    Tags: , , FNAL MicroBooNE, , ,   

    From Fermilab: “MicroBooNE installs time projection chamber inside vessel, prepares for move” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Tuesday, Jan. 7, 2014
    Sarah Witman

    On Dec. 20, Fermilab collaborators on the MicroBooNE experiment successfully installed the time projection chamber in the experiment’s vessel at the DZero assembly building.

    device
    A crew installed MicroBooNE’s 5-ton time projection chamber in its cryostat last month. Photo: Reidar Hahn

    The completion of this step is a milestone in the experiment’s years-long narrative. Once the detector is moved to the new Liquid-Argon Test Facility, MicroBooNE scientists can begin a new stage of exploration of the behavior of chargeless, subatomic particles called neutrinos.

    Even though neutrinos are all around us, they are not fully understood. One of scientists’ longstanding questions about neutrinos is how one type morphs into another. MicroBooNE aims to address this and other questions and better explain neutrinos’ role in the universe.

    Once MicroBooNE is up and running, experimenters will shoot beams of neutrinos, manufactured at Fermilab, into the 10-meter-long time projection project chamber, which is filled with 89 tons of liquid argon and sits inside a silo-like vessel called a cryostat. When one of the neutrinos hits an argon nucleus, it will release particles, some of which are charged. This interaction, while it happens in the blink of an eye, will take many months to decipher. Thus scientists make sure that the detector “takes pictures” of all that goes on in its dark, cavernous depths.

    As part of that process, the experiment uses a uniform, high-voltage electric field across the cage-like frame of the time projection chamber. This ensures that, when a charged particle is released, it will travel through the liquid argon, stripping electrons off the argon atoms along the way. The electrons in turn are directed along the electric field to the wires that are positioned along one side of the detector.

    These delicate, gilded wires — all 8,256 of them — took MicroBooNE team members about two months to hand-string across the TPC. They “take the pulse” of each charged particle traversing the TPC and send information about its interaction to researchers’ computers.

    This information is translated into pixels, where each pixel represents the wire that recorded the interaction and each line of pixels represents that wire over time (usually a few microseconds, which is fairly long in particle physics). This “projection” of each wire’s activity over a period of time is where the time projection chamber gets its name, explained Jonathan Asaadi, a postdoc from Syracuse University working on the experiment.

    The wires are angled three different ways — vertically, and rotated 60 degrees to the left and right — so that a computer can construct a 3-D image of the interaction.

    MicroBooNE researchers use a computer algorithm — a similar type of algorithm, in fact, used for facial recognition in airport security — to try to interpret these images and find anomalies. Their different shapes and patterns indicate which type of neutrino was involved in the interaction.

    “By looking at interactions in our detector, we can measure the effective rate at which our neutrinos are changing form,” said Fermilab’s Jennifer Raaf, co-construction manager for MicroBooNE. “That tells us something, fundamentally, about physics.”

    Not only this, but MicroBooNE’s experimenters aim to demonstrate the detector technology needed for the proposed Long-Baseline Neutrino Experiment. LBNE’s multi-kiloton detector would be a far more massive, higher-voltage version of MicroBooNE’s.

    The collaboration is now hooking up the TPC’s cables, after which they’ll test the electronics, cover the open end of the TPC with an endcap and weld the whole thing shut. Then the detector is ready for its move to the Liquid-Argon Test Facility.

    “We’ve been assembling the TPC for more than a year now, so it’s a great feeling to finally have it sitting on its resting pads inside the cryostat,” Raaf said. “Hopefully, the next steps will go as smoothly as the insertion did.”

    See the full article here.

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  • richardmitnick 4:13 pm on December 11, 2013 Permalink | Reply
    Tags: , FNAL MicroBooNE, , , , ,   

    From Fermilab: “MicroBooNE, in 3-D” 


    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Wednesday, Dec. 11, 2013
    Andre Salles

    Imagine your job is to analyze the data coming from Fermilab’s MicroBooNE experiment.

    It wouldn’t be an easy task. MicroBooNE has been designed specifically to follow up on the MiniBooNE experiment, which may have seen hints of a fourth type of neutrino, one that does not interact with matter in the same way as the three types we know about. The big clue to the possible existence of these particles is low-energy electrons.

    But that experiment could not adequately separate the production of electrons from the production of photons, which would not indicate a new particle. MicroBooNE’s detector, an 89-ton active volume liquid-argon time projection chamber, will be able to. To take advantage of this, every neutrino interaction in the chamber will have to be examined to determine if it created an electron or a photon.

    And there will be a lot of interactions to study — the MicroBooNE collaboration expects to see activity in their detector once every 20 seconds, including nearly 150 neutrino interactions each day.

    If all goes to plan, human operators won’t have to worry about any of that. When MicroBooNE switches on next summer, it will sport one of the most sophisticated 3-D reconstruction software programs ever designed for a neutrino experiment.

    According to Wesley Ketchum and Tingjun Yang, two postdocs leading the software development team at Fermilab, MicroBooNE’s computers will be able to accurately reconstruct neutrino interactions and automatically filter the ones that create electrons. The key to accomplishing this lies in the design of the time projection chamber.

    two
    Tingjun Yang (left) and Wesley Ketchum lead the effort to develop new 3-D reconstruction software for the MicroBooNE experiment. Here they stand inside the MicroBooNE time projection chamber. Photo: Reidar Hahn

    The MicroBooNE detector — the largest time projection chamber in the United States — will be filled with heavy liquid argon and placed in the path of the Booster’s neutrino beam. When neutrinos interact with the argon, they create charged particles that ionize the argon atoms. A high-voltage electric field will draw those ionization electrons toward three planes of wires, spaced three millimeters apart. As they pass through, each plane of wires will take a snapshot of the electrons. Taken together, the snapshots will form a full picture of the original particles.

    “Three planes of wires at different angles will provide a picture of the neutrino interaction in 3-D,” Ketchum said. “We only need two, but the third helps us get rid of ambiguity.”

    The software should be able to provide clear pictures of the data scientists are interested in studying.

    See the full article here [Sorry, the usually dependably archive link is not working. Go to the archive for today, Wednesday, Dec. 11, 2013]
    .

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  • richardmitnick 11:01 am on August 22, 2013 Permalink | Reply
    Tags: , FNAL MicroBooNE, , ,   

    From Fermilab: “Tracking particles with LArIAT” 

    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Thursday, Aug. 22, 2013
    Laura Dattaro

    “A neutrino is a tricky thing: It rarely interacts with other particles, and it doesn’t leave a track as it enters a detector. But a relatively new technology, called a liquid-argon time projection chamber, is helping scientists to understand them. MicroBooNE, the second phase of the Booster Neutrino Experiment, is one example of a LArTPC, and in order to help it do its job, scientists are first building a test detector called LArIAT—essentially a mini MicroBooNE.

    micro
    Microboone Detector

    mini
    Miniboone

    LArIAT—Liquid-Argon TPC In A Test beam—is a small version of MicroBooNE, with a capacity for about three-quarters of a ton of liquid argon instead of MicroBooNE’s 170 tons. Its aim is to study particle tracks to better understand how different types of particles – in particular electrons and photons—interact in liquid argon, and how these interactions appear in the collected data.

    ‘Understanding what a proton track looks like in comparison to a pion track or a kaon track is one of the goals of LArIAT,’ said Jennifer Raaf, a spokesperson for the experiment.”

    See the full article here.

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  • richardmitnick 12:49 pm on March 30, 2012 Permalink | Reply
    Tags: , , , FNAL MicroBooNE, ,   

    From Fermilab Today: “Fermilab’s MicroBooNE begins detector construction” 

    Fermilab is an enduring source of strength for the US contribution to scientific research world wide.

    Brad Hooker
    Friday, March 30, 2012

    “Fermilab’s neutrino experiment, MicroBooNE, is beginning the full construction phase for the detector, after DOE announced the official Critical Decision 3b approval on March 29.

    ‘This is a significant milestone for the MicroBooNE project,’ said project manager Gina Rameika, noting that the next step in the DOE CD process will be CD 4, which is approval to start operations, planned for mid-2014.

    In the last phase of the project, the MicroBooNE collaboration began acquiring precision-made parts for the detector from institutions like Brookhaven National Laboratory, Syracuse University and Yale University. Soon the team will begin assembling those pieces.

    The inner time projection chamber, which will provide three-dimensional reconstructions of neutrino events, will soon begin assembly within the DZero building, a former experiment hall for the Tevatron. When this is finished, the 33-foot-long TPC will slide into a cryostat-cooling chamber and move to its new housing at the Liquid Argon Test Facility, currently under construction at Fermilab. Once there, scientists will begin tracking neutrinos with liquid argon, allowing high sensitivity for the experiment.”

    lbne
    The MicroBooNE experiment at Fermilab will detect neutrinos with a time projection chamber that holds about 100 tons of liquid argon cooled to minus 187 degrees Celsius. The TPC will be 12 meters long and have a width and height of 2.5 meters. Credit: Fermilab

    See the full article here.


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  • richardmitnick 11:14 am on November 16, 2011 Permalink | Reply
    Tags: , , , FNAL MicroBooNE,   

    From Fermilab Today: “CDF and DZero buildings to house new projects “ 


    Fermilab continues to be a great source of strength in the U.S. Basic Research Community.

    “On Sept. 30, the CDF and DZero experiments at Fermilab recorded their final particle collisions. Now technicians and engineers are busy preparing the two buildings that supported the collider detectors to accommodate future uses, while preserving the two particle detectors and their control rooms for educational tours that will be offered starting in the fall of 2012.

    The 36,000-square-foot CDF assembly building, including its 50-ton crane, will become part of the Illinois Accelerator Research Center. Groundbreaking for the main IARC building, which will rise right next to the western side of the CDF building and connect with it on several levels, will take place on Dec. 16. While the IARC is under construction, the Particle Physics Division will use the east side of the CDF building for detector development and construction, including work on the Mu2e experiment. The CDF collaboration will continue to operate computers on the third floor for the analysis of CDF data.

    i1
    Artist’s rendering of IARC

    A portion of the DZero building will serve as an assembly area for the 170-ton detector of a new Booster neutrino experiment called MicroBooNE, while the DZero collaboration continues to use the complex as its home base.

    ‘Space in the high-bay area of the DZero assembly building will be ready for use by the MicroBooNE collaboration by the middle of January 2012,’ said George Ginther, a manager of the DZero decommissioning plans. The assembly of the MicroBooNE detector and its liquid-argon system will take about a year. When complete, the equipment will be moved into a new building in the Booster neutrino beam line.

    At CDF, the clearing out of the building is in progress.

    ‘We have removed about 30 pallets of material so far,’ said CDF decommissioning manager Jonathan Lewis. ‘Some things will be reused by other experiments, other things will go into storage at other locations on site, or are being recycled or thrown out. We need to have the west end of the building clear and ready for when the IARC construction gets into full swing in 2012.’

    See the full article here.

     
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