Detectors and DAQ Used for Nucleon Spin Structure Experiments in Hall-A at JLab
- Kalyan Allada, Thomas Jefferson National Accelerator Facility (JLab)
Tuesday, May 28, 10:00 AM - Special Seminar
NSCL Seminar Room
High energy electron-scattering method is a powerful tool to probe the internal structure of the nucleon. In particular, semi-inclusive deep inelastic scattering (SIDIS) process, where the scattered electron from a nucleon target is detected in coincidence with a produced hadron, provides an access to rich internal dynamics of quarks inside the nucleon. In this talk I will discuss a recent SIDIS experiment performed in Hall-A (one of the four halls) at Jefferson Lab, and present some details of detectors and data-acquisition system (DAQ) performance in the experiment. Detectors consist of a High Resolution Spectrometer (HRS) to detect the produced hadron, and a large acceptance BigBite spectrometer to detect the scattered electron. Hadron particle identification was achieved using a combination of different detectors (gas Cerenkov, calorimeter, aerogel Cerenkov counter), along with coincidence time-of-flight method. I will also discuss some of our plans and challenges for building new detectors and DAQ systems for the future 12 GeV experiments in Hall-A.