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Neutron bang time detector based on a light pipe.

V Yu Glebov¹, M Moran, C Stoeckl

¹Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA. vgle@lle.rochester.edu

The Review of Scientific Instruments

|December 3, 2008

Summary

This summary is machine-generated.

A new neutron bang time detector was developed for the OMEGA Laser Facility. This system accurately measures fusion reaction timing with picosecond precision.

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Area of Science:

Nuclear Fusion Diagnostics
High-Energy Laser Systems
Particle Detection Instrumentation

Background:

The OMEGA Laser Facility requires precise timing measurements for fusion experiments.
Existing diagnostic tools may have limitations in temporal resolution for neutron detection.

Purpose of the Study:

To implement and calibrate a neutron bang time detector at the OMEGA Laser Facility.
To achieve high temporal accuracy in measuring the precise moment of neutron emission from fusion targets.

Main Methods:

A detector system comprising a scintillator, light pipe, photomultiplier tube (PMT), and high-bandwidth oscilloscope was utilized.
The scintillator was positioned 23 cm from the target, with signal transmission via a 9.6-m stainless steel pipe.
A 6 GHz, 10 GSs oscilloscope recorded PMT signals, synchronized with the OMEGA optical fiducial pulse train.

Main Results:

The neutron bang time detector was successfully implemented on the OMEGA Laser Facility.
The system achieved absolute temporal calibration.
Accurate bang time measurements (better than 25 ps) were demonstrated for neutron yields exceeding 1x10^9.

Conclusions:

The developed neutron bang time detector provides a reliable and highly accurate diagnostic for fusion experiments.
This instrument enhances the capability to study fusion reaction dynamics at the OMEGA Laser Facility.
The detector's performance meets stringent timing requirements for high-yield fusion events.