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Showing 1 to 20 of 33 for “"Thomas Jefferson National Accelerator Facility"”.
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Measurement Of Neutron Radius In Lead By Parity Violating Scattering Flash ADC DAQ
… <sup>208</sup>Pb. PREx is performed in hall A of Thomas Jefferson National Accelerator Facility from March 19th to June 21st. Longitudionally polarized electrons at energy 1 GeV scattered at and agnle of θ<em>l<sub>ab</sub></em> = 5.8° from the Lead target. Beam corrected pairty violaing counting …
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Topics on electron,neutrino and axion scattering
… at the Compton Polarimeter located in Hall-C at Thomas Jefferson National Accelerator Facility. The Mississippi State Axion Search, an axion search experiment which uses light shining through a wall technique is described in detail, including its instrumentation, initial tests and future impact. …
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Spin structure of the proton and the Q² evolution of the Gerasimov-Drell-Hearn integral
… Large Acceptance Spectrometer (CLAS) of the Thomas Jefferson National Accelerator Facility during the Fall of 1998. A cryogenic NH3 target was used as a source of protons polarized in the direction of the incident electron beam. For the first time, proton spin structure functions were studied …
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High Energy Measurements of the Dueteron Photodisintegration Differential Cross Section
… differential cross section were made at the Thomas Jefferson National Accelerator Facility in Newport News, Virginia. Two experiments were performed. Experiment E96-003 was performed in experimental Hall C. The measurements were designed to extend the highest energy differential cross section …
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High Energy Measurements of the Deuteron Photodisintegration Differential Cross Section
… differential cross section were made at the Thomas Jefferson National Accelerator Facility in Newport News, Virginia. Two experiments were performed. Experiment E96-003 was performed in experimental Hall C. The measurements were designed to extend the highest energy differential cross section …
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Disentangling the EMC effect: from free to bound nucleon structure
… correlations. The BAND experiment at the Thomas Jefferson National Accelerator Facility seeks to probe the bound proton structure when in a strongly-interacting state, using spectator-tagged deep inelastic scattering. This thesis presents the results of the BAND experiment, demonstrating …
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Measurement of the (e,e') cross section for 12C, 48Ti, 27Al and 40Ar
… experiment E12-14- 012 in Hall A at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). In the E12-14-012 experiment, we collected data for the inclusive (e,e′) and exclusive (e,e′p) processes for a variety of targets (argon, titanium, aluminum, carbon) at a wide range of …
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Measurement of Pion-Pion Final State Interactions in η → π +π −γ with CLAS at Jefferson Lab
… Acceptance Spectrometer located in Hall B at the Thomas Jefferson National Accelerator Facility in 2004. The data was collected using a tagged photon beam with energy range of 1.5-3.5 GeV incident on a liquid Hydrogen target. Our results are in agreement with the latest experimental measurement …
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High precision measurement of the proton elastic form factor ratio at low Q²
… polarimetry. Data were taken in 2008 at the Thomas Jefferson National Accelerator Facility in Virginia, USA. A 1.2 GeV polarized electron beam was scattered off a cryogenic hydrogen target. The recoil proton was detected in the left HRS in coincidence with the elastically scattered electrons …
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Electroproduction of Neutral Pion Off Helium-4
… the CLAS detector in the experimental Hall B at Thomas Jefferson National Accelerator Facility. The data were collected in 2009 with a 6 GeV longitudinally polarized electron beam impinging on a 30 cm long, 6 atm Helium-4 gaseous target. In order to ensure that the process is coherent, a new …
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Measurement of a weak polarization sensitivity to the beam orbit of the CEBAF accelerator
An accelerator-based experiment was performed using the CEBAF accelerator of the Thomas Jefferson National Accelerator Facility to investigate a predicted sensitivity of the beam polarization to the vertical betatron orbit in the recirculation arcs. This is the first measurement of any such effect …
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Electroproduction of the Phi(1020) Vector Meson at 4 GeV
… 2.6 GeV. The data were taken and analyzed at the Thomas Jefferson National Accelerator Facility. For the first time, we observe the expected t-slope dependence on Q² and Δ𝜏 in 𝜙 vector meson production. We find that the width of the forward 𝜙-meson diffraction peak increases rapidly as the …
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PRECISION MEASUREMENT OF QUASI-ELASTIC TRANSVERSE AND LONGITUDINAL RESPONSE FUNCTIONS IN THE RANGE 0.55 GeV/cj <q <1.0 GeV/c
… in the quasi-elastic region was performed at the Thomas Jefferson National Accelerator Facility. Incident electrons with energies ranging from 0:4 GeV to 4 GeV scattered off 4He,12C,56Fe and 208Pb nuclei at four scattering angles (15;60;90;120) and scattered energies ranging from 0:1 GeV to 4 GeV. …
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Instrument Design Optimization with Computational Methods
… instruments in experimental Hall C at the Thomas Jefferson National Accelerator Facility are analyzed. The time dependence of density fluctuations from the liquid hydrogen (LH2) target used in the <em>Q<sub>weak</sub></em> experiment (2011-2012) are studied with Computational Fluid Dynamics …
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Nucleon structure and Its modification in nuclei
… The GMp experiment in Hall A at the Thomas Jefferson National Accelerator Facility (JLab) seeks to measure this cross-section with high precision up to large momentum transfers. In addition, it is known that the inelastic structure of the nucleon is modified inside the nucleus. This …
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Deeply Virtual Compton Scattering at Hall A, Jefferson Lab
… been conducted in the Experimental Hall-A of Thomas Jefferson National Accelerator Facility (JLab). This thesis presents the extraction of DVCS cross section in 9 total kinematic points from the 3rd generation experiment (DVCS3) conducted after the 12 GeV upgrade of the Continuous Electron …
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Utilizing Parity Violating Electron Scattering As a Probe to Measure the Neutron Radius of 208-pb
… Experiment (CREX) carried out in Hall A of the Thomas Jefferson National Accelerator Facility were designed to measure the neutron skins of 208-Pb and 48-Ca nuclei by measuring the parity-violating asymmetry APV of the elastic scattering of polarized electrons on 208-Pb and 48-Ca targets. In …
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A scaler-based data acquisition system for measuring parity violation asymmetry in deep inelastic scattering
… 0.3 was completed in experimental Hall A at the Thomas Jefferson National Accelerator Facility. The asymmetry can be used to extract the neutral weak coupling combination (2C2u-C2d), providing a factor of five to six improvement over the current world data. To achieve this precision, asymmetries …
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Precision Measurement of the Proton's Weak Charge using Parity-Violating Electron Scattering
… of Qp w(SM) = 0.0708 ± 0.0003. Qweak ran at the Thomas Jefferson National Accelerator Facility for two and a half years and was installed in experimental Hall C. A 180µA beam of longitudinally polarized electrons at 1.16 GeV scattered off a liquid hydrogen target of unpolarized protons. The …
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Double spin asymmetry AL̳T̳ in charged pion production from deep inelastic scattering on a transversely polarized ³He target
… 2009 using a 5.9 GeV polarized electron beam at Thomas Jefferson National Accelerator Facility Experimental Hall A. The kinematics focused on the valence quark region, 0.16 < x < 0.35 with 1.4 < Q2 < 2.7 GeV2. The systematic uncertainties in this measurement due to acceptance, detector response …
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