A helium gas scintillator active target for photoreaction measurements
Author
Summary, in English
A multi-cell He gas scintillator active target, designed for the measurement of photoreaction cross sections, is described. The target has four main chambers, giving an overall thickness of 0.103 g/cm(3) at an operating pressure of 2MPa. Scintillations are read out by photomultiplier tubes and the addition of small amounts of N-2 to the He, to shift the scintillation emission from UV to visible, is discussed. First results of measurements at the MAX IV Laboratory tagged-photon facility show that the target has a timing resolution of around 1 ns and can cope well with a high-flux photon beam. The determination of reaction cross sections from target yields relies on a Monte Carlo simulation, which considers scintillation light transport, photodisintegration processes in He-4, background photon interactions in target windows and interactions of the reaction-product particles in the gas and target container. The predictions of this simulation are compared to the measured target response.
Department/s
Publishing year
2015
Language
English
Publication/Series
European Physical Journal A. Hadrons and Nuclei
Volume
51
Issue
10
Document type
Journal article
Publisher
Springer
Topic
- Accelerator Physics and Instrumentation
Status
Published
Project
- Development of Radiation Detectors and Radiation-Detection Techniques
ISBN/ISSN/Other
- ISSN: 1434-6001