# ChAKRA : The high resolution charged particle detector array at VECC

## TL;DR

ChAKRA is a high-resolution, large-area charged particle detector array designed for detailed reaction studies in heavy ion collisions at energies of 10-60 MeV/A, featuring segmented detectors for comprehensive angular coverage.

## Contribution

This paper presents the design, construction, and characterization of the novel ChAKRA detector array, enabling high-resolution, event-by-event charged particle detection in heavy ion experiments.

## Key findings

- Successful development of a 4π charged particle detector array
- High granularity and resolution achieved in particle detection
- Capability to detect a wide range of charged particles at various angles

## Abstract

A large 4$\pi$ array of charged particle detectors has been developed at Variable Energy Cyclotron Centre to facilitate high resolution charged particle reaction and spectroscopy studies by detecting event-by-event the charged reaction products emitted in heavy ion reactions at energy $\sim$ 10-60 MeV/A. The forward part ($\theta \sim \pm $ $7^{0}$ - $\pm 45^{0}$) of the array consists of 24 highly granular, high resolution charged particle telescopes, each of which is made by three layers [single sided silicon strip($\Delta$E) + double sided silicon strip (E/$\Delta$E) + CsI(Tl)(E)]of detectors. The backward part of the array consists of 112 CsI(Tl) detectors which are capable of detecting primarily the light charged particles (Z $\le$ 2) emitted in the angular range of $\theta \sim \pm $ $45^{0}$ - $\pm 175^{0}$. The extreme forward part of the array ($\theta \sim \pm $ $3^{0}$ - $\pm 7^{0}$) is made up of 32 slow-fast plastic phoswich detectors that are capable of detecting light (Z $\le$2) and heavy charged particles (3 $\le$ Z $\lesssim$ 20) as well as handling high count rates. The design, construction and characterization of the array has been described.