GlueX

The GlueX Collaboration consists of about 100 physicists from 25 institutions in countries. The goal of this experiment is to map out the spectrum of exotic hybrid mesons -- the 'smoking gun' signature for gluonic excitations. The crucial feature is using linearly polarized photons to produce these states -- photons are expected to be particularly effective in producing exotic hybrids.

The optimum photon beam energy is 9 GeV and the production of linearly polarized photons of this energy by coherent bremsstrahlung requires 12 GeV electrons. The CEBAF accelerator at Jefferson Lab (JLab) must be doubled from its current operating energy and a new beamline, a new experimental hall (Hall D) and new spectrometer must also be built. These are described in the GlueX conceptual design report and in the JLab 12 GeV upgrade plans.

Visit the collaboration website, www.gluex.org, or the GlueX Portal for the most recent news regarding the GlueX experiment.

Indiana University Responsibilties

Alex Dzierba is the spokesperson for the GlueX/HallD Collaboration. The Task D group is responsible for construction of both the Forward Calorimter and Time of Flight system. Matt Shepherd is coordinating R&D efforts on these subsytems and involvd in GlueX software development. Eric Scott is working all mechanical aspects of the detector including systems integration and construction of prototype detector elements. The Task D group has collaborate closely with the group from U. Regina on development and prototyping of the GlueX Barrel Calorimeter. In addition, Adam Szczepaniak is member of the theory group within the collaboration.

The large superconducting solenoid to be used in GlueX was moved from Los Alamos to the IU Cyclotron Facility (IUCF). The magnet will be refurbished at IUCF and current plans are to assemble and energize the magnet with some detector elements installed inside the magnet. When these tests are completed the magnet will be moved to JLab.