Bulletin of the American Physical Society
APS April Meeting 2014
Volume 59, Number 5
Saturday–Tuesday, April 5–8, 2014; Savannah, Georgia
Session S7: Instrumentation II |
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Chair: Adbellah Ahmidouch, North Carolina A&T State University Room: 201 |
Monday, April 7, 2014 1:30PM - 1:42PM |
S7.00001: Development of fast-release solid catchers for rare isotopes Jerry Nolen, John Greene, Jeong-Seog Song, Jeffrey Elam, Anil Mane, Uma Sampathkumaran, Raymond Winter, David Hess, Mohammad Mushfiq, Daniel Stracener Porous solid catchers of rare isotopes produced at high energies via in-flight reactions can play an important role in high power heavy ion accelerator facilities such as RIKEN, FRIB, and RISP. Such catchers can be complementary to helium gas catchers especially for parasitic harvesting of rare isotopes in the in-flight separators at such facilities. Materials for solid catchers are being developed by Innosense, LLC, under the DOE ONP SBIR program. The role of the catchers at high energy heavy ion facilities is to stop and quickly release rare isotopes for research with these isotopes either with stopped-beam instruments or as reaccelerated beams. Solid catchers can operate effectively with high intensity secondary beams, e.g. \textgreater \textgreater 1E10 atoms/s with release times as short as 10-100 milliseconds. A new method for characterizing the release curves of such catchers is being developed at Argonne under this SBIR program. The method will utilize a very efficient and sensitive commercial residual gas analyzer for rapid measurements following implantation of stable isotopes delivered as energetic heavy ion beams. [Preview Abstract] |
Monday, April 7, 2014 1:42PM - 1:54PM |
S7.00002: ABSTRACT WITHDRAWN |
Monday, April 7, 2014 1:54PM - 2:06PM |
S7.00003: Development of an Isotropic Optical Light Source for Testing Nuclear Instruments Zachary Yokley Nuclear instruments that employ optical components and that require precise characterization and calibration of these components need well characterized optical light sources with the desired wavelength, intensity, and known emission spectrum. One technique is to use the emission from an incoherent light source such as an LED. This talk will present work on a novel technique for determining integral performance (though not timing) by producing an effective isotropic source from an LED. The technique utilizes servo motors to position an LED in a variety of directions. Next, a weighted average of the detector responses is performed, where the weights for each direction are proportional to the value of the probability density functions for the polar and azimuthal angle of an isotropic source. ~The theory of operation for this technique, results of Monte Carlo simulation validation studies, as well as experimental results for application to the LENS detector design will be presented. [Preview Abstract] |
Monday, April 7, 2014 2:06PM - 2:18PM |
S7.00004: MOVED TO L1.029 |
Monday, April 7, 2014 2:18PM - 2:30PM |
S7.00005: The fissionTPC Mike Heffner A new instument to study fission, called the fissionTPC, has been constructed to make high accuracy measurements of neutron induced fission cross-sections of the major actinides. Most of the cross sections have been measured over the last 60 years, although improvements in the accuracy of the data appear unlikely with the current technology. A potential breakthrough is the deployment of the Time Projection Chamber (TPC) which was developed within the particle physics community. The NIFFTE collaboration, a group of 7 universities and 4 national laboratories, has undertaken the task of building the first TPC for this purpose. In this talk I will present the fission TPC design, challenges that had to be addressed, and the performance of the detector. [Preview Abstract] |
Monday, April 7, 2014 2:30PM - 2:42PM |
S7.00006: The GA PEAcH: A Portable Electrostatic Accelerator Patrick McClanahan, Ashlyn Burch, Quintorious Bivins, Megan Garrett, Zachary Jordan, Rhett Roberts, Benjamin Thomas, Sharon Careccia, Rommie Johnson, Ralph France III, K.C. McGill, Jr., Mark Spraker In collaboration with the University of North Georgia, we are constructing a portable electrostatic ion accelerator at Georgia College. It will use a model 2JA066280 R.F. ion source from National Electrostatics Corporation to produce ions from gaseous elements and a model AU-100N1 100 kV power supply to produce the accelerating voltage. The linear accelerator will be less than 2 meters in length. The beam energy will be roughly determined by the acceleration voltage. Low energy proton-induced fusion reactions are envisioned for both pure and applied physics research. One potential application is to use the 17 MeV $\gamma$-ray from the $^7Li(p,\gamma)^8Be$ reaction to help calibrate $\gamma$-ray detectors at the Hi$\gamma$s facility. [Preview Abstract] |
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