Report of the Instrumentation Frontier Working Group for Snowmass 2021
Phillip S. Barbeau (1), Petra Merkel (2), Jinlong Zhang (3), Darin, Acosta (4), Anthony A. Affolder (5), Artur Apresyan (2), Marina Artuso (6),, Vallary Bhopatkar (7), Stephen Butalla (8), Gabriella A. Carini (9), Thomas, Cecil (3), Amy Connolly (8), C. Eric Dahl (2, 10)

TL;DR
This report reviews the current state, challenges, and future research priorities of detector instrumentation in high energy physics, emphasizing technological advancements and R&D needs for upcoming experiments across various physics frontiers.
Contribution
It provides a comprehensive overview of instrumentation technologies, identifies key challenges, and outlines high-priority R&D areas for future particle physics experiments.
Findings
Identification of current instrumentation capabilities
Highlighting of future technological challenges
Prioritized research areas for detector development
Abstract
Detector instrumentation is at the heart of scientific discoveries. Cutting edge technologies enable US particle physics to play a leading role worldwide. This report summarizes the current status of instrumentation for High Energy Physics (HEP), the challenges and needs of future experiments and indicates high priority research areas. The Snowmass Instrumentation Frontier studies detector technologies and Research and Development (R&D) needed for future experiments in collider physics, neutrino physics, rare and precision physics and at the cosmic frontier. It is divided into more or less diagonal areas with some overlap among a few of them. We lay out five high-level key messages that are geared towards ensuring the health and competitiveness of the US detector instrumentation community, and thus the entire particle physics landscape.
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