Abstract
Jefferson Laboratory is finishing a major upgrade and has already started operations with the 12 GeV continuous electron beam. The main research direction is the study of the structure of hadrons, including a search for gluon excitations in the spectra of light mesons and baryons, and studies of multidimensional images of the nucleon. Studied of certain properties of atomic nuclei are also ongoing. There is also an active program of searching for effects beyond the Standard Model in parity-violating electron scattering, as well as a search for new particles.
Highlights
For more than a decade Thomas Jefferson National Accelerator Facility has operated a continuous electron accelerator CEBAF providing polarized electron beams up to 6 GeV energy and 180 μA current to 3 experimental halls A, B, and C
The facility is finishing a major upgrade, which doubles the energy of the accelerator to 12 GeV and installs new experimental equipment
Can we discover evidence for physics beyond the standard model of particle physics?
Summary
For more than a decade Thomas Jefferson National Accelerator Facility has operated a continuous electron accelerator CEBAF providing polarized electron beams up to 6 GeV energy and 180 μA current to 3 experimental halls A, B, and C. The facility is finishing a major upgrade, which doubles the energy of the accelerator to 12 GeV and installs new experimental equipment. The beams can be extracted using RF separators after 1 – 5 passes to halls A – C. One of the beams can be extracted magnetically to Hall D after 5.5 passes. The extraction scheme has been upgraded in order to serve 4 experimental halls at the same time. Hall A ran physics experiments while Hall D finished commissioning and started the physics program. In Spring 2017 halls A and D ran experiments, while CLAS12 and Hall C started commissioning. Hall B ran experiment PRAD, which was not using CLAS12
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