Picosecond Precision Heavy-Ion Detector for {\Lambda} Hypernuclei Lifetime Studies

TL;DR

This paper introduces a novel heavy-ion detector with 10 picosecond resolution designed for precise measurements of { extLambda} hypernuclei lifetimes, combining RF timing and spatial detection techniques.

Contribution

The paper presents a new detector design that achieves high temporal resolution and effective background suppression for hypernuclei lifetime studies.

Findings

Detector design confirmed feasible through simulations.

Preliminary tests with laser and alpha particles show promising performance.

Simulations suggest effective separation of prompt and delayed events.

Abstract

In this paper, we present the design and preliminary performance evaluation of a new heavy-ion detector for direct measurements of heavy {\Lambda} hypernuclei lifetime. The detector employs the previously developed 10 picosecond resolution Radio Frequency (RF) Timer, which converts the temporal information of incident particles into spatial coordinates of secondary or photoelectrons on a position-sensitive detector by means of circular RF scanning in the 500-1000 MHz range. Here, we report the detector design to achieve efficient suppression of accidental background and effective separation of prompt reaction products and delayed events from {\Lambda} hypernuclei decays, results of test studies carried out with RF synchronized laser as well as preliminary results obtained by using alpha particles. Dedicated Monte-Carlo simulations have been performed to estimate the detector's performance under realistic experimental conditions at RF-driven electron, photon, or proton beams. The results confirm the feasibility of the proposed design and provide a basis for upcoming experimental measurements, based on the delayed fission detection.