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Nevis Seminar

The Nevis Seminar is designed to bring the different research groups at Nevis together to present their work on a monthly basis. Lunch will be provided 1/2 hour before the talks begin.

  • Where: Nevis Laboratories (directions: http://www.nevis.columbia.edu/directions.html), Mansion House Conference Room. Lunch will be in the dinning room in the mansion.
  • When: Usually the 4th Thursday of the month during Fall and Winter semesters.
  • Schedule:
Winter 2015:
Date Time Speaker Title Description Notes Slides
Friday Feb. 27th 1pm Marcos Santander, Columbia University Searching for the sources of cosmic-rays with VERITAS and IceCube A century of cosmic-ray research has unveiled many of the key properties of these energetic particles that reach Earth from outer space. The sources of cosmic-rays, however, remain unknown. A potential clue to finding these elusive objects is the recent observation of an astrophysical flux of high-energy neutrinos by the IceCube detector as these particles may be produced in hadronic interactions near cosmic-ray accelerators. While the neutrino sky map shows no indication of point sources so far, their presence could be revealed by detecting the hadronic gamma-ray counterpart to the neutrino emission using the VERITAS air Cherenkov array. In this talk, I will describe the VERITAS and IceCube detectors, discuss the astrophysical implications of the neutrino flux observed by IceCube and outline how observations with gamma-ray telescopes can be used to reveal its origin. Lunch at 12:30 pm  
Friday Mar. 13th 1pm Daniel Whiteson, UC Irving Observing Ultra-High Energy Cosmic Rays with Smartphones We propose a novel approach for observing cosmic rays at ultra-high energy ($>10^{18}$~eV) by repurposing the existing network of smartphones as a ground detector array. Extensive air showers generated by cosmic rays produce muons and high-energy photons, which can be detected by the CMOS sensors of smartphone cameras. The small size and low efficiency of each sensor is compensated by the large number of active phones. We show that if user adoption targets are met, such a network will have significant observing power at the highest energies. Lunch at 12:30 pm  
Tuesday Mar. 24th 1pm Kerston Perez, Haverford College and Columbia University TBA TBA Lunch at 12:30 pm  

Fall 2014:

Date Time Speaker Title Description Notes Slides

Thursday Oct. 30th

1pm Gianfranco Vidali, Syracuse University Cosmic Low Temperature Physics: Making Molecules on Stardust Over 180 different molecular species have been detected in the Interstellar Medium. Although many of the molecules form in the gas-phase, there are some that are formed on surfaces of dust grains. Among these, molecular hydrogen and water are perhaps the most important ones because of their role in astrophysics (star formation) and astrochemistry/astrobiology. In the last decade, advances in observations via space telescopes and in laboratory techniques have led to great progress in characterizing the Molecular Universe. After an introduction about molecules and dust in the Interstellar Medium, I’ll present examples of how laboratory work and theoretical simulations have enabled us to understand how molecules form on stardust and how they influence the chemical evolution of the cosmos. Furthermore, I will show how specific knowledge acquired in the laboratory is guiding observations of actual processes in space. Lunch at 12:30 pm  

Thursday Nov. 20th

1pm Ben Bostick, Lamont-Doherty Earth Observatory Rates and mechanisms of metal sulfide oxidation by microbial consortia: insights from synchotron X-ray spectroscopy   Lunch at 12:30 pm  

Winter 2014:

Date Time Speaker Title Description Notes Slides

Thursday Jan. 30th

1pm Tim Andeen The ATLAS Experiment, from Nevis to CERN Columbia University has a large team of scientists working on the ATLAS experiment at the Large Hadron Collider (LHC) at CERN in Geneva, Switzerland. Scientists from Nevis have been involved in every aspect of the experiment. Significant components of ATLAS were developed and built at Nevis and work continues upgrading the detector. The latest searches for physics beyond the Standard Model will be discussed as we look forward to even higher energy collisions in 2015 and beyond. Lunch at 12:30 pm  
Tuesday Feb. 18th 1pm Jose Alonso Pushing the Envelope of Cyclotron Technology: from Medical Applications to Neutrino Sources The Cyclotron, patented by E.O. Lawrence in 1934, has traditionally been a tool for nuclear physicists to study properties of nuclei. Even from the earliest days, however, applications of the beams from these machines in other fields have played an important role. Glenn Seaborg, in 1938 proposed the first use of an iodine isotope he discovered at the 27” cyclotron as a medical tracer, and in that same year Ernest's brother John Lawrence developed a program of treating tumors with neutrons from cyclotron beams hitting beryllium targets. Today cyclotrons are in widespread use: for radioisotope production, for cancer therapy with proton beams, and for increasingly-diversified programs in nuclear and particle physics research. This talk will cover the range of applications, and the evolution of machines optimized for each, and will explore new developments, from compact superconducting machines tailored for medical uses, up to and including a new project for development of very high-current cyclotrons as compact, cost-effective neutrino sources. Lunch at 12:30 pm  
Thursday Feb. 27th 1pm Mike Hahn Evidence for Wave Heating in the Solar Corona One of the major problems in astrophysics is to understand how the solar corona is heated to over a million degrees. In this talk I will review the coronal heating problem, its possible solutions, and present our results indicating that waves carry energy into the corona from lower layers of the Sun. Lunch at 12:30 pm  
Thursday Mar. 27th 1pm André Loose Counting krypton atoms, one at a time Atom trap trace analysis (ATTA) is a method to detect trace amounts of noble gas isotopes, with up to one part per quadrillion sensitivity - equivalent to one drop of water diluted into a water cube as tall as the Empire State Building. I will talk talk about the ATTA setup at Columbia, which will be used to monitor the krypton contamination in the XENON1T dark matter detector. Lunch at 12:30 pm  
Thursday Apr. 24th 1pm Rachel Carr The Double Chooz Experiment
The Double Chooz experiment, located in northeastern France, was designed to look for the oscillation of electron antineutrinos coming from nearby nuclear reactors. In 2011, it provided the first hint that this phenomenon exists, indicating that the neutrino mixing parameter theta_13 is nonzero. Since then, Double Chooz has developed many techniques to improve the precision of theta_13 measurements. I will talk about the experiment, our analyses, and what we've learned.
Lunch at 12:30 pm  

Fall 2013:

Date Time Speaker Title Description Notes Slides
Sept. 26th 1pm   Laboratories tour   Lunch at 12:30 pm  
Oct. 24th 1pm Ester Aliu Astrophysics at the TeV scale How experiments like VERITAS detect particles at this extreme energy and which scientific questions we try to address.The contribution of the Barnard and Columbia VERITAS groups will be described Lunch at 12:30 pm  
Nov. 21st 1pm Joy Didier EBEX: The E and B EXperiment. Measuring the polarization of the Cosmic Microwave Background (CMB) provides us with a wealth of information on the origin, composition and dynamics of the universe. EBEX is a balloone-borne telescope designed to measure the polarization of the CMB. I will give an overview of the instrument and of the recent science flight in Antarctica. Lunch at 12:30 pm  
Dec. 17th 1pm William Seligman A Brief History of the Nevis Estate + Christmas party Lunch at 12:30 pm Slides

Winter 2013:

Date Time Speaker Title Description Notes Slides
Jan. 24th 2pm Leslie Camilleri The Nevis Neutrino Program The experiments that the Nevis Neutrino group is involved in will be described, together with their relevance to the current state of Neutrino research Lunch at 1:30 pm NevisSemJan24.pdf
Feb. 28th 1pm Guillaume Plante Xenon : Searching for Dark Matter with Liquid Xenon Detectors Why is dark matter needed, how can we detect it (hopefully!), the XENON project and the contributions of the Nevis XENON group. Lunch at 12:30 pm  
Mar. 28th 1pm Andrew D. Harken An overview of RARAF From broad beams to microbeams, single proteins to small animals. Where we have been to where we are going. Lunch at 12:30 pm

An_overview_of_RARAF-Harken_2013.pdf

An_overview_of_RARAF-Harken_2013.pptx

Tues

Apr. 16th

2:30 pm Jose Alonso Pushing the envelope of Cyclotron Technology: From Medical Applications to Neutrino Sources.  

Tuesday.

Wine and cheese after the seminar

 
May 9th

1:30 pm

Ken Miller Laboratory Astrochemistry From the early universe to the interstellar medium Lunch at 1 pm  

Organizers:

Tim Andeen, tand... AT nevis DOT columbia DOT edu and Nathalie de Ruette, nathalie.der... AT astro DOT columbia DOT edu

-- TimothyAndeen - 08 Jan 2013

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf An_overview_of_RARAF-Harken_2013.pdf r2 r1 manage 17355.1 K 2013-03-29 - 01:14 TimothyAndeen  
PowerPointpptx An_overview_of_RARAF-Harken_2013.pptx r1 manage 38863.6 K 2013-03-28 - 21:05 TimothyAndeen  
PDFpdf NevisSemJan24.pdf r1 manage 40370.1 K 2013-04-03 - 01:04 TimothyAndeen  
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Topic revision: r34 - 2015-02-21 - TimothyAndeen
 
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