Jefferson Lab

An overhead view of Hall D, the newest experimental hall at Jefferson Lab, and part of the 12 GeV Upgrade project. On Dec. 14, operators of the Continuous Electron Beam Accelerator Facility (CEBAF) delivered 12 GeV electrons (12.065 Giga electron Volts) to the Hall D complex. Critical to the detector system is the superconducting solenoid magnet – the large red and green equipment is the solenoid.

The new CEBAF Large Acceptance Spectrometer for the 12 GeV Upgrade (CLAS12) is taking shape in Experimental Hall B. Here, the CLAS12 Torus magnet hub (center:silver hexagonal system) is installed, along with almost all of the drift chamber systems (Regions 1, 2 and 3).

The CEBAF accelerator delivered full-energy electrons on Dec. 14 as part of commissioning activities for the ongoing 12 GeV Upgrade project. Operators of the Continuous Electron Beam Accelerator Facility delivered the first batch of 12 GeV electrons (12.065 Giga electron Volts) to its newest experimental hall complex, Hall D.

In Hall C, the Super High Momentum Spectrometer (SHMS) is taking shape. Here, the Dipole magnet is being lowered to its final position in November 2016. The SHMS is being built as part of the 12 GeV Upgrade, and it will enable precision measurements of energetic particles produced in experiments in the 12 GeV era.

Nuclear physicists are now poised to embark on a new journey of discovery into the fundamental building blocks of the nucleus of the atom. The completion of the 12 GeV Upgrade Project of the Continuous Electron Beam Accelerator Facility (CEBAF) heralds this new era to image nuclei at their deepest level. For more information, click here.