Bulletin of the American Physical Society
2020 Fall Meeting of the APS Division of Nuclear Physics
Volume 65, Number 12
Thursday–Sunday, October 29–November 1 2020; Time Zone: Central Time, USA
Session RK: Mini-Symposium: Novel detector Technologies, from detectors to data analysis III |
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Chair: Julia Velkovska, Vanderbilt |
Sunday, November 1, 2020 8:30AM - 8:42AM |
RK.00001: Tracking and Vertex Reconstruction for MUSE Peter Solazzo The MUon proton Scattering Experiment will make measurements of muon and electron elastic scattering on the proton.The experiment will access both charge states, enabling both comparison of mu$+$/mu- and e$+$/e- and direct measurement of the two-photon effect in a Q2 region relevant to the proton radius puzzle. MUSE will be the first experiment to produce muon proton scattering data in the region of interest with sufficient precision to address the proton radius puzzle. In order to achieve these aims, accurate reconstruction of particle tracks is essential. The collaboration's current intent to use the GenFit package, available at genfit.sourceforge.net, for all detectors, as well as developing independent trackers for each detector will be discussed. Creating multiple tracking programs will allow easier analysis of tracking performance in individual detectors as well as globally. Also discussed will be the current method of extracting the scattering angle using the tracks. This material is based upon work supported by the National Science Foundation under Grant No. NSF PHY-1714833. The MUSE experiment is supported by the Binational Science Foundation, the Department of Energy, NSF and PSI. [Preview Abstract] |
Sunday, November 1, 2020 8:42AM - 8:54AM |
RK.00002: Timing Detectors with SiPM Read-out at MUSE Wan Lin The MUon proton Scattering Experiment (MUSE) at the PiM1 beam line of the Paul Scherrer Institute works to simultaneously measure elastic scattering of electrons and muons from a liquid hydrogen target to extract the charge radius of the proton. Both beam polarities are measured over the course of the experiment. By comparing the four scattering cross sections, the experiment will provide unique muon proton scattering data with a precision sufficient to address the proton radius puzzle, and will directly measure two-photon exchange effects for both muons and electrons. Precise timing measurements, at the 100 ps level, are needed to identify particle and reaction types, and to measure beam momentum. I will discuss two scintillator detectors in the experiment that use silicon photomultiplier readout to achieve precise timing resolution. Recent analysis using these detectors will be presented. [Preview Abstract] |
Sunday, November 1, 2020 8:54AM - 9:06AM |
RK.00003: Mixed Material Scintillator Systems Xianyi Zhang, Jason Brodsky, Andrew Mabe, Elaine Lee, Dominique Henry Porcincular We present two conceptional organic scintillator detectors that utilize additive manufacture (3D-printing) of mixed materials to enable new capabilities. Both new scintillators use fine structures of different colored dyes to harness the wavelength of scintillation light to encode additional information in radiation measurements. The first detector uses 3D-printed periodic dye microstructures to encode particle tracking information, allowing for directional neutron detection and gamma/neutron discrimination. Another type of scintillator uses a dye gradient to indicate the position of radiation along the gradient. Outstanding performances of these new scintillators in particle identification, directionality and spectroscopy measurements, as well as particle position reconstruction, have been demonstrated through simulation. A scintillating polysiloxane-based printing feedstock has also been developed to enable prototyping of these detector designs. [Preview Abstract] |
Sunday, November 1, 2020 9:06AM - 9:18AM |
RK.00004: Tracking for the STAR Forward Upgrade James Brandenburg The STAR Collaboration is constructing a forward rapidity (2.5 $<$ $\eta$ $<$ 4) upgrade that will include charged particle tracking and electromagnetic/hadronic calorimetry. Charged particle tracking capabilities are achieved via a combination of silicon detectors and small strip thin gap chamber detectors. Combining these detector types to achieve tracking in the STAR forward region poses unique challenges since charged particles in the forward region traverse a non-uniform magnetic field. A novel tracking framework has been developed to harness the full potential of the forward tracking detectors. This tracking framework combines genetic algorithms for track seed finding and iterative track fitting implemented with the GenFit2 tracking library. The design and implementation of the tracking system will be discussed and performance estimates from simulations will be presented. [Preview Abstract] |
Sunday, November 1, 2020 9:18AM - 9:30AM |
RK.00005: STAR Forward Silicon Tracker Upgrade Status Xu Sun The STAR Collaboration at RHIC plans to install a suite of new detectors in the forward rapidity region ($2.5 < \eta < 4.0$), enabling a program of novel measurements in pp, pA and AA collisions after Beam Energy Scan Phase II. This upgrade comprises new electromagnetic and hadronic calorimetry and a new Forward Tracking System (FTS), which consists of a Forward Silicon Tracker (FST) and Forward small-strip Thin Gap Chambers (sTGC). The FST is essential to discriminate hadron charge for transverse asymmetry studies and separating electrons and positrons for Drell-Yan measurements. In this talk, we will present the design and the construction status of the FST together with the mechanical support and integration plan. We will also briefly discuss the performance studies of the FST prototype modules in cosmic ray and laser tests. [Preview Abstract] |
Sunday, November 1, 2020 9:30AM - 9:42AM |
RK.00006: Forward sTGC Tracker Prototyping and Performance Test for the STAR Upgrade Yingying Shi The STAR experiment at RHIC is undergoing an upgrade including a new Forward Tracking System (FTS), which consists of a Forward Silicon Tracker (FST) and a Forward sTGC Tracker (FTT). The small-strip Thin Gap Chambers (sTGC) at STAR are designed to provide a precision position measurement of about 100um for charged particles at high luminosity, covering a rapidity region (2.5 \textless $\eta$ \textless 4). This extended rapidity coverage combining particle tracking detectors and calorimetry opens novel physics opportunities in pp, pA and AA collisions in the years following the Beam Energy Scan II (BES-II) at STAR. Three different sTGC prototypes have been designed at Shandong University. The first pre-prototype has been installed at STAR in 2019 during the BES-II run. A full size prototype has been tested with cosmic rays at Shandong University. The latest prototype, a pentagon-shaped design, is being constructed in 2020. In this presentation, the R\&D details on prototyping and performance testing of these prototypes will be presented. The current status and future plans of the FTT upgrade will be discussed. [Preview Abstract] |
Sunday, November 1, 2020 9:42AM - 9:54AM |
RK.00007: STAR Forward Silicon Tracker: Characterizing Prototype Module Performance with Cosmic Rays and Simulation Studies Gavin Wilks The STAR forward upgrade includes a Forward Silicon Tracker (FST) based on silicon strip sensor technology, providing track reconstruction for charged particles with full azimuthal coverage in the rapidity range of 2.5\textless y\textless 4. The FST prototype modules were tested and calibrated with cosmic rays using Inner Silicon Tracker (IST) staves for track alignment. Detection efficiency and position resolution of the prototypes were measured, and their dependencies on operating conditions and clustering algorithms were studied. Since track reconstruction is contingent on the efficiency and resolution of individual FST modules, more realistic predictions of charged particle detection with the FST can be produced from MC simulation using the results measured with the prototypes. In this talk, we will discuss the cosmic ray and simulation studies with the FST prototypes. [Preview Abstract] |
Sunday, November 1, 2020 9:54AM - 10:06AM |
RK.00008: The ND-Cube Active-Target Detector Commissioning Tan Ahn, J. Randhawa, S. Jin, M. Renaud, S. L. Henderson, S. Aguilar, M. Z. Serikow, W. Jackson, L. Yan, A. Tollefson, L. Delgado, S. Rameriz Martin, J. Koci, J. Levano, A. Mubarak, L. Jensen, N. Dixneuf, J. Levano, P. D. O'Malley Active-target detectors have become an important tool in studying nuclear reactions for radioactive-beam programs due to their gas target and tracking abilities. The ND-Cube is an active-target detector that is being developed for use in radioactive beam experiments from TwinSol at the University of Notre Dame. The ND-Cube will allow for a range of radioactive-beam experiments using light-ion reactions. An important step in using the ND-Cube is to characterize its tracking ability for the geometry and pad plane design chosen. The ND-Cube has a rectangular geometry with a 20 cm by 30 cm active area and uses a Micromegas or ThGEMs for amplification with a high-granularity pad plane. The current status of the testing and commissioning of the detector with $\alpha$ source measurements and in-beam measurements will be presented including gas gain measurements, various trigger configurations, and track reconstruction. [Preview Abstract] |
Sunday, November 1, 2020 10:06AM - 10:18AM |
RK.00009: Characterization and development of position-sensitive multi-wire ionization chambers E. Cheetham, S.D. Pain, K.A. Chipps, K.L. Jones, A. Ratkiewicz, H. Sims, C. Ummel Zero-degree detectors are ubiquitous in radioactive ion beam experiments, both for separation of forward-focussed recoils and beam normalization. Ionization chambers are well-suited to this role, as they are robust under heavy ion bombardment and can be operated at typical radioactive ion beam intensities. A fast (capable of mid 10$^5$ ions/s) multi-wire ionization chamber with a stacked electrode design was built at Oak Ridge National Laboratory in 2019. The modular detector, which is sufficiently compact to be operated within GODDESS, incorporates two position-sensitive anodes to determine position as an ion enters the detector. An upgraded version is planned incorporating more position-sensitive anodes, thereby increasing count rate capacity and enabling particle tracking throughout the detector. An update on the development of this chamber will be presented, along with a characterization of the response of the existing detector from an experiment at the ReA3 facility at the NSCL. [Preview Abstract] |
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