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Nuclear Seminars 2014 Spring


  Title: An Advanced Ion Guide for Beam Cooling and Bunching for Collinear Laser Spectroscopy of Rare Isotopes
  Speaker: Dr. Bradley Barquest
  Institute: NSCL, MSU
  Date: Tuesday, April 22, 2014
  Time: 4:00 - 5:00 pm EST
  Place: Nieuwland Science Hall, Room 124

  Abstract:

Collinear laser spectroscopy provides a means of determining nuclear magnetic dipole and electric quadrupole moments and mean square charge radii of rare isotopes through the measurement of hyperfine spectra. Measurements performed at projectile fragmentation facilities with gas stopping capability can complement the efforts of ISOL-based efforts. Collinear laser spectroscopy of rare isotopes requires efficient transport of pulsed beams with very low energy spread. To this end, a next generation beam cooler and buncher has been developed and commissioned at the NSCL to provide bunched, low energy spread ion beams for collinear laser spectroscopy of rare isotopes. The beam cooler and buncher features a novel electrode design intended to simplify construction and maintenance, as well as permit the use of large radiofrequency (RF) amplitudes for more efficient beam cooling, especially in the case of high beam currents. The cooler and buncher has been characterized with an offline ion source, and an online measurement of the hyperfine spectrum of the D1 transition of 37K has been performed. The results of commissioning measurements will be presented.


Topic

Date

Speaker

Double beta decay and matter
dominated universe
January 14 Prof. Tadafumi Kishimoto
Research Center for Nuclear Physics, Osaka University, Japan
Nuclear Structure Studies with the Active-Target Time-Projection-Chamber: Moving Towards Exotic Beams January 20 Dr. Tan Ahn
NSCL/Michigan State University
Ion Traps for Astrophysics January 27 Dr. Jason Clark
Argonne National Laboratory
Probing Properties of the Weak Interaction using Trapped Atoms and Ions February 3 Prof. Daniel Melconian
Texas A&M University
Fishing in a sea of Xe – Barium-ion tagging for 136Xe double-beta decay studies with EXO February 17 Dr. Thomas Brunner
Stanford University
Accelerator Mass Spectrometry of Heavy Isotopes February 18 Dr. Stephan Winkler
University of Vienna, Austria
Nuclear astrophysics constraining cosmology February 20 Prof. René Reifarth
Goethe-University Frankfurt
am Main, Germany
Nuclear Data Measurements at LANSCE:
The NIFFTE fission TPC
February 24 Dr. Rhiannon Meharchand
Los Alamos National Laboratory
Modifications of the Nuclear Shell Structure: Spectroscopy in Islands of Inversion March 3 Prof. Kathrin Wimmer
Central Michigan University
Spring Break
Advances in Explosive Nuclear Astrophysics March 31 Dr. Gavin Lotay
University of Surrey, UK
Isospin Invariant Energy Density
Functional Approach
April 14 Dr. Javid Sheikh
Oak Ridge National Laboratory
An Advanced Ion Guide for Beam
Cooling and Bunching for Collinear Laser Spectroscopy of Rare Isotopes
Tue. April 22 Dr. Bradley Barquest
NSCL, MSU
Easter Holiday
The TRIUMF experience with the
Design, Fabrication and Commissioning
of Large Gap Wien Filters
April 28
3:00pm
Dr. Syd Kreitzman
TRIUMF,Canada
TBA May 5 Dr. Nicholas Scielzo
Lawrence Livermore National Laboratory
TBA May 12 Ms. Qian Li
Univeristy of Notre Dame


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