epic.github.io/_public/detector.md

0001 ---
0002 title: ePIC Detector
0003 name: detector
0004 layout: public
0005 ---
0006
0007 <h4>The ePIC Detector</h4>
0008
0009 * TOC
0010 {:toc}
0011
0012 The ePIC detector instruments state of the art detector technology to provide precision momentum, energy and particle identification over a large acceptance. This is achieved using several detector suites which make up the central detector, providing coverage from about 3—177 degrees (|&eta;| < 3.5), while the far foward and backward detectors expand the acceptance to |&eta;| > 6.
0013 <hr/>
0014 #### Central Detector
0015
0016 <div><img src="https://zenodo.org/records/14026774/files/ePIC_CentralDetector.png"   style='height: auto; width: 50%; object-fit: contain'/></div>
0017
0018 The ePIC **Central Detector** is very compact spanning a cylindrical volume that is about 9.5m longitudinally and 2.67m radially, covering an acceptance of about 3&deg;-177&deg;, limited by the beam pipes. The transverse momentum of charged particles are measured by reconstructing the particle’s trajectory. This is achieved through its **[tracking system](#tracking_detectors)** consisting of state-of-the art silicon and micro-pattern gas detectors, which are instrumented within a 1.7T magnetic field, generated from a 2.8m bore diameter **[superconducting solenoid](#superconducting-solenoid)** magnet.
0019 A combination of **[electromagnetic calorimeters](#electromagnetic-calorimeter-detectors)**  and **[hadron calorimeters](#hadron-calorimeter-detectors)** is implemented to measure the energy that particle’s deposit as they traverse these layers. Finally, to identify the type of particle being detected, a set of fast timing and Cerenkov based **[particle identification](#pid-detectors)** detectors are implemented.
0020
0021
0022 <hr/>
0023 #### Superconducting Solenoid
0024 <div><img src="https://zenodo.org/records/14026774/files/Magnet_Overview.png"   style='height: auto; width: 100%; object-fit: contain'/></div>
0025
0026 <hr/>
0027 #### Tracking Detectors
0028 <div><img src="https://zenodo.org/records/14026774/files/Tracker_Overview_01.png"   style='height: auto; width: 100%; object-fit: contain'/></div>
0029 The ePIC central tracking system is composed of several detectors leveraging state-of-the-art silicon and micro-pattern gas detector (MPGD) technologies. The inner tracker volume consists of highly granulated silicon detectors making up three vertex layers, two-barrel layers, and 5 disks in both the lepton and hardon going directions. Whereas the outer tracking volume is instrumented with large-area MPGDs, with two-barrel layers and two discs in each of the lepton and hadron going directions. The silicon and MPGD detectors cover roughly 7.5 m^2 and 34.4 m^2, respectively. The combination of the silicon and MPGD based tracking system, along with the solenoid magnet, forms a robust tracking system capable of providing excellent tracking performance through its use of high precision measurements.
0030 <hr/>
0031 #### PID Detectors
0032
0033 <div><img src="https://zenodo.org/records/14026774/files/PID_Overview_01.png"   style='height: auto; width: 100%; object-fit: contain'/></div>
0034
0035 <hr/>
0036 #### Electromagnetic Calorimeter Detectors
0037 <div><img src="https://zenodo.org/records/14026774/files/EMCal_Overview.png"   style='height: auto; width: 100%; object-fit: contain'/></div>
0038
0039 <hr/>
0040 #### Hadron Calorimeter Detectors
0041 <div><img src="https://zenodo.org/records/14026774/files/HCal_Overview.1.png"   style='height: auto; width: 100%; object-fit: contain'/></div>
0042
0043 <hr/>
0044 #### Far Detectors
0045 <div><img src="https://zenodo.org/records/11522461/files/far_detectors.png"   style='height: auto; width: 50%; object-fit: contain'/></div>
0046
0047 The detector hermeticity is to a large extent restore equipping the angular
0048 regions not covered by the central detector by the Far Detectors situated along the outgoing beam lines. The **Far Detectors** along the
0049 outgoing ion beam line detect proton with different magnetic rigidity,
0050 soft photons and neutron. Along the outgoing electron beam line, the low Q2
0051 tagger station complete the Q2 acceptance of the Central Detector, while the
0052 luminosity station makes possible the, measurement and monitoring of the luminosity
0053 provided by the collider.