Bulletin of the American Physical Society
2016 Fall Meeting of the APS Division of Nuclear Physics
Volume 61, Number 13
Thursday–Sunday, October 13–16, 2016; Vancouver, BC, Canada
Session KF: Nuclear Instrumentation II |
Hide Abstracts |
Chair: . Nuruzzaman, Rutgers University Room: Pavilion Ballroom A |
Saturday, October 15, 2016 2:00PM - 2:12PM |
KF.00001: Results from a prototype Lead-Scintillating Fiber Calorimeter for use as a STAR Forward Detector Prashanth Shanmuganathan Forward instrumentation consisting of hadronic as well as electromagnetic calorimeters will achieve several physics goals at RHIC. Examples include studying the internal structure of nucleons and properties of nuclear matter through measurement of forward jets and long-range correlations. Earlier studies that pixelized AGS E864 lead-scintillating fiber calorimeter cells (10 cm$^2$x117 cm) into a three by three array of 3.3 cm$^2$ pixels showed that neutral pions can be reconstructed to E$>$15 GeV and hadronic shower shapes can be distinguished from EM shower shapes with 90\% confidence. In this contribution, we compare the light collection efficiency from total internal reflective light guides with that of a Fresnel lens system; light signals for both guide types are recorded using photomultiplier tubes (PMT) and silicon photomultipliers (SiPM). The Fresnel lens system allows better magnetic shielding of PMTs from the STAR magnet fringe field and focuses light into the small sensitive area of the SiPM. A prototype of these designs consisting of a two by three array of cells (54 pixels) was mounted on the east side of the STAR detector during Run16 and 80 million events from Au+Au collisions at $\sqrt{s_{NN}}$ =200 GeV were recorded. In this talk, we will present comparisons [Preview Abstract] |
Saturday, October 15, 2016 2:12PM - 2:24PM |
KF.00002: GEM Detectors and Preliminary Analysis of Proton Charge Radius (PRad) Experiment at Jefferson Lab Xinzhan Bai The PRad experiment (E12-11-106\footnote{Spokespersons: A.Gasparan(Contact), H. Gao, M. Khandaker, D. Dutta}) was recently performed at Jefferson Lab in Hall B, it was designed to measure the proton charge radius through the elastic electron proton scattering process, using a non-magnetic-spectrometer method. The experiment reaches very low ep scattering angles and thus an unprecedented low four-momentum transfer squared region, $Q^2$ from $2\times10^{-4}$ to $0.1(GeV/c)^2$. The experiment measures the proton charge radius by extracting the electric form factor of proton with a sub-percent precision. Gas Electron Multiplier (GEM) detectors have contributed to reach the experimental goal. A pair of world largest GEM detectors, and a high resolution calorimeter(HyCal) were utilized in the experiment. In this talk, we will present the performance of GEM detectors approached in the experiment, such as efficiency and other characteristics, and preliminary analysis of the experimental data. [Preview Abstract] |
Saturday, October 15, 2016 2:24PM - 2:36PM |
KF.00003: Radiation-damage of single-crystal diamond detectors in swift heavy ion beams Andreas Stolz, Ayan Bhattacharya, Timothy A. Grotjohn Single-crystal diamond detectors fabricated by Chemical Vapor Deposition were irradiated with swift heavy ion beams in the energy range of 100-150 MeV/u at the National Superconducting Cyclotron Laboratory at Michigan State University. The degradation of the detector performance was monitored during irradiation by the output signal amplitude. After exposure to a particle fluence of 10$^{\mathrm{13}}$/cm$^{\mathrm{2}}$, the diamond samples were characterized by the Transient Current Technique to understand the effect of the beam induced damage in the charge transport properties. [Preview Abstract] |
Saturday, October 15, 2016 2:36PM - 2:48PM |
KF.00004: A Deuterated Neutron Detector Array For Nuclear (Astro)Physics Studies. Sergio Almaraz-Calderon, B. W. Asher, P. Barber, K. Hanselman, J. F. Perello The properties of neutron-rich nuclei are at the forefront of research in nuclear structure, nuclear reactions and nuclear astrophysics. The advent of intense rare isotope beams (RIBs) has opened a new door for studies of systems with very short half-lives and possible fascinating properties. Neutron spectroscopic techniques become increasingly relevant when these neutron rich nuclei are used in a variety of experiments. At Florida State University, we are developing a neutron detector array that will allow us to perform high-resolution neutron spectroscopic studies with stable and radioactive beams. The neutron detection system consists of 16 deuterated organic liquid scintillation detectors with fast response and pulse-shape discrimination capabilities. In addition to these properties, there is the potential to use the structure in the pulse-height spectra to extract the energy of the neutrons and thus produce directly excitation spectra. This type of detector uses deuterated benzene (C$_6$D$_6$) as the liquid scintillation medium. The asymmetric nature of the scattering between a neutron and a deuterium in the center of mass produces a pulse-height spectrum from the deuterated scintillator which contains useful information on the initial energy of the neutron. [Preview Abstract] |
Saturday, October 15, 2016 2:48PM - 3:00PM |
KF.00005: The Spectrometer for Internal Conversion Electrons at TRIUMF-ISAC James Smallcombe, Lee Evitts, Adam Garnsworthy, Mohamad Moukaddam SPICE (SPectrometer for Internal Conversion Electrons) is a powerful tool to measure conversion coefficients and $E0$ transitions in nuclei. $E0$ transition strengths, which are not accessible by gamma-ray spectroscopy, are a sparsely measured observable. Such transition strengths are particularly sensitive to nuclear shape and state mixing effects and as such are a key item of data in studying the evolution of shape coexistence. SPICE is an ancillary detector that has been commissioned for use with Radioactive Ion Beams (RIBs) at the ISAC-II facility of TRIUMF. The main feature of SPICE is high efficiency over a range of electron energies from 100 to 3500 keV, crucial for work with RIBs, and an effective reduction of beam-induced backgrounds. This is achieved with an upstream magnetic lens, a high-$Z$ photon shield and a large-area lithium-drifted silicon detector. A major theme of the physics program will be the investigation of shape coexistence and state mixing in exotic nuclei. An overview of the main features of SPICE will be presented alongside details of the commissioning and preliminary data from the first experiment studying excited structures in $^{110}$Pd. [Preview Abstract] |
(Author Not Attending)
|
KF.00006: First Data with the Hybrid Array of Gamma-Ray Detectors (HAGRiD) Karl Smith, S Burcher, A.B. Carter, R. Gryzwacz, K.L. Jones, S. Munoz, S.V. Paulauskas, K. Schmitt, C. Thornsberry, K.A. Chipps, M. Febbraro, S.D. Pain, T. Baugher, J.A. Cizewski, A. Ratkiewicz, B. Toomey The structure of nuclei provides insight into astrophysical reaction rates that are difficult to measure directly. These studies are often performed with transfer reaction and beta-decay measurements. These experiments benefit from particle-gamma coincident measurements providing information beyond that of particle detection alone. The Hybrid Array of Gamma Ray Detectors (HAGRiD) of LaBr$_3$(Ce) scintillators has been designed with this purpose in mind. The design of the array permits it to be coupled with particle detector systems, such as the Oak Ridge Rutgers University Barrel Array (ORRUBA) of silicon detectors and the Versatile Array of Neutron Detectors at Low Energy (VANDLE). It is also designed to operate with the Jet Experiments in Nuclear Structure and Astrophysics (JENSA) advanced target system. HAGRiD's design avoids compromising the charged-particle angular resolution due to compact geometries often used to increase the gamma efficiency in other systems. First experimental data with HAGRiD coupled to VANDLE as well as ORRUBA and JENSA will be presented. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700