JLab12
The JLab12 experiment studies processes of electrons scattering on nuclei (from hydrogen to lead), with the aim of deepening and improving the understanding of the dynamics and structure of the nucleus and its constituents, to carry out measures connected with the weak interaction and with the related tests of the Standard Model, and to understand the structure and properties of celestial bodies such as neutron stars. In recent years, it has extended its field of investigation to search for dark matter. It uses the Continuous Electron Beam Accelerator Facility) electron accelerator (CEBAF) and related experimental halls, located at the Thomas Jefferson Laboratory (JLab) in Virginia (USA). The CEBAF recirculating linear accelerator provides a very stable, up to 12 GeV, polarized beam and, combined with fixed targets, one of the highest luminosities currently available, allowing the study of scattering processes with very low cross sections.
The Rome group is directly involved in an experimental research program which includes: the study of hypernuclei [1] of the little known hyperion-nucleon interaction, and parity violation processes [2], both with relevant astrophysical implications; precision measurements of elastic and deeply inelastic reactions to investigate the origin of the spin and mass of the nucleon (proton and neutron) [3].
For these researches the group has contributed to the development and realization of experimental instrumentation, including, recently: two Ring Imaging Cherenkov detectors for the identification of produced hadrons, a charged particle tracker based on silicon microstrip planes and Gaseous Electron Multiplier (GEM) chambers, magnetic septa to allow the detection of particles scattered at small angles. As part of the recent dark matter research (BDX program), members of the Rome group are responsible for the development of an electronic digitization board, in continuous readout mode, without trigger, an emerging acquisition paradigm in many (sub)nuclear physics experiments.
Websites:
Thesis Opportunities:
Identifying correlations and relativistic effects in the nuclear medium:
Abstract: The thesis analyzes the data collected during the experiment E06-007 performed at the laboratory JLab, located at Newport News, Virginia (USA). Its goal is the measurement of the 208Pb(e,e’p)207Tl cross section at quasi-elastic kinematics at relatively high missing momentum in order to understand the role of short and long range correlations and of dynamical relativistic effects in determining nuclear medium properties. - Contact person: Guido Maria Urciuoli.Charged Particle Tracker commissioning for high luminosity experiments at JLab
Abstract: The National Jefferson Laboratory (JLab) in Virginia/USA offers a unique, high intensity, multi GeV polarized electron beam facility to carry on (sub)nuclear physics by electron-nucleon high luminosity scattering experiments. The thesis will focus on the commissioning of a new charged particle tracker based on the Gaseous Electron Multiplier (GEM) technology and Silicon microstrip that will be used for the experimental investigation of inner structure of the nucleon (protons and neutrons). The student shall familiarize with the detector hardware, its data acquisition and analysis frameworks. The thesis activity may require few weeks at JLab for the participation to the GEM installation and test measurements. - Contact person: Evaristo Cisbani.
Local Coordinator
Evaristo Cisbani| Name | Surname | Role | Position |
|---|---|---|---|
| Fabrizio | Ameli | Dipendente | Primo Tecnologo |
| Evaristo | Cisbani | Associato | Dirigente di Ricerca ISS |
| Franco | Garibaldi | Associato | Professore Emerito |
| Franco | Meddi | Associato | Senior |
| Guido Maria | Urciuoli | Associato | Senior |