The SπRIT time projection chamber

Area of Science:

• Nuclear Physics
• High-Energy Physics

Background:

• Investigating the equation of state of neutron-rich nuclear matter is crucial for understanding nuclear structure and astrophysical phenomena.
• Heavy ion collisions provide a unique laboratory to probe matter under extreme conditions.

Purpose of the Study:

• To present the design and performance of the Superconducting Analyzer for MUlti-particles from RAdioIsotope (SAMURAI) Pion-Reconstruction and Ion-Tracker Time Projection Chamber (SπRIT TPC).
• To enable precise measurements of heavy ion collisions using the SAMURAI spectrometer at RIKEN.
• To provide constraints on the equation of state of neutron-rich nuclear matter.

Main Methods:

• The SπRIT TPC features a 50.5 cm drift length and an 86.4 × 134.4 cm^2 pad plane with 12,096 pads.
• Utilizes generic electronics for Time Projection Chambers (TPCs).
• Performance evaluated using cosmic rays and charged particles from heavy ion collisions.

Main Results:

• The SπRIT TPC demonstrates excellent reconstruction capabilities for particles.
• Achieves isotopic resolution for pions and other light charged particles.
• Effective across a wide range of energy losses and momenta.

Conclusions:

• The SπRIT TPC is a well-suited detector for studying heavy ion collisions.
• The detector's performance supports its use in constraining the equation of state of nuclear matter.
• Provides valuable data for nuclear physics research at RIKEN.