Publications (18)
DarkLight: A Search for Dark Forces at the Jefferson Laboratory Free-Electron Laser Facility
J. Balewski, J. Bernauer, W. Bertozzi +64
We give a short overview of the DarkLight detector concept which is designed to search for a heavy photon A' with a mass in the range 10 MeV/c^2 < m(A') < 90 MeV/c^2 and which deca…
A New Cryogenic Apparatus to Search for the Neutron Electric Dipole Moment
M. W. Ahmed, R. Alarcon, A. Aleksandrova +91
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with a major improvement in sensitivity compared to the existing limit in the search for a neutron Elect…
Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering: Determined by the OLYMPUS Experiment
B. S. Henderson, L. D. Ice, D. Khaneft +67
The OLYMPUS collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, , a direct measure of the contribution…
Measurement of Moller Scattering at 2.5 MeV
C. S. Epstein, R. Johnston, S. Lee +15
Moller scattering is one of the most fundamental processes in QED. Understanding it to high precision is necessary for a variety of modern nuclear and particle physics experiments.…
The OLYMPUS Experiment
R. Milner, D. K. Hasell, M. Kohl +70
The OLYMPUS experiment was designed to measure the ratio between the positron-proton and electron-proton elastic scattering cross sections, with the goal of determining the contrib…
Two-Photon EXchange -- TPEX
R. Alarcon, R. Beck, J. C. Bernauer +33
We propose a new measurement of the ratio of positron-proton to electron-proton, elastic scattering at DESY to determine the contributions beyond single-photon exchange, which are…
The Two-Photon Exchange Experiment at DESY
R. Alarcon, R. Beck, J. C. Bernauer +36
We propose a new measurement of the ratio of positron-proton to electron-proton elastic scattering at DESY. The purpose is to determine the contributions beyond single-photon excha…
Operation and characterization of a windowless gas jet target in high-intensity electron beams
B. S. Schlimme, S. Aulenbacher, P. Brand +54
A cryogenic supersonic gas jet target was developed for the MAGIX experiment at the high-intensity electron accelerator MESA. It will be operated as an internal, windowless target…
Searching for New Physics with DarkLight at the ARIEL Electron-Linac
The DarkLight Collaboration, E. Cline, R. Corliss +43
The search for a dark photon holds considerable interest in the physics community. Such a force carrier would begin to illuminate the dark sector. Many experiments have searched fo…
Precision Electron-Beam Polarimetry using Compton Scattering at 1 GeV
A. Narayan, D. Jones, J. C. Cornejo +33
We report on the highest precision yet achieved in the measurement of the polarization of a low energy, (1 GeV), electron beam, accomplished using a new polarimeter ba…
The sPHENIX Micromegas Outer Tracker
S. Aune, B. Azmoun, A. Bonenfant +37
The sPHENIX Time Projection Chamber Outer Tracker (TPOT) is a Micromegas based detector. It is a part of the sPHENIX experiment that aims to facilitate the calibration of the Time…
The neutron electric dipole moment experiment at the Spallation Neutron Source
K. K. H. Leung, M. Ahmed, R. Alarcon +90
Novel experimental techniques are required to make the next big leap in neutron electric dipole moment experimental sensitivity, both in terms of statistics and systematic error co…
Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment
J. C. Bernauer, A. Schmidt, B. S. Henderson +67
We report the first measurement of the average of the electron-proton and positron-proton elastic scattering cross sections. This lepton charge-averaged cross section is insensitiv…
Low- elastic electron-proton scattering using a gas jet target
Y. Wang, J. C. Bernauer, B. S. Schlimme +54
In this paper, we describe an experiment measuring low- elastic electron-proton scattering using a newly developed cryogenic supersonic gas jet target in the A1 three-spectrom…
Realization of a Large-Acceptance Faraday Cup for 3 MeV Electrons
R. Johnston, J. Bernauer, C. M. Cooke +12
The design, construction, installation, and testing of a Faraday Cup intended to measure the current of a 3 MeV, 1 microampere electron beam is described. Built as a current monito…
The DarkLight Experiment: A Precision Search for New Physics at Low Energies
J. Balewski, J. Bernauer, J. Bessuille +37
We describe the current status of the DarkLight experiment at Jefferson Laboratory. DarkLight is motivated by the possibility that a dark photon in the mass range 10 to 100 MeV/c$^…
A novel comparison of Møller and Compton electron-beam polarimeters
J. A. Magee, A. Narayan, D. Jones +38
We have performed a novel comparison between electron-beam polarimeters based on Møller and Compton scattering. A sequence of electron-beam polarization measurements were performe…
Design and Operation of a Windowless Gas Target Internal to a Solenoidal Magnet for Use with a Megawatt Electron Beam
S. Lee, R. Corliss, I. FriÅ¡ÄiÄ +37
A windowless hydrogen gas target of nominal thickness cm is an essential component of the DarkLight experiment, which is designed to utilize the megawatt electron…