# Hyper-track selector nuclear emulsion readout system aimed at scanning an area of one thousand square meters

## TL;DR

The paper presents the development and performance of the hyper-track selector, a high-speed nuclear emulsion readout system capable of scanning large areas efficiently, significantly advancing experimental capabilities.

## Contribution

It introduces the hyper-track selector system with a novel wide-field lens achieving nearly 100 times faster scanning speeds than previous systems.

## Key findings

- Scanning speed of 4700 cm²/h achieved
- System structure and specifications detailed
- Enables large-scale nuclear emulsion experiments

## Abstract

Automatic nuclear emulsion readout systems have seen remarkable progress since the original idea was developed almost 40 years ago. After the success of its full application to a large-scale neutrino experiment, OPERA, a much faster readout system, the hyper-track selector (HTS), has been developed. HTS, which has an extremely wide-field objective lens, reached a scanning speed of 4700 cm$^2$/h, which is nearly 100 times faster than the previous system and therefore strongly promotes many new experimental projects. We will describe the concept, specifications, system structure, and achieved performance in this paper.