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First neutron spectrometry measurement at the HL-2A Tokamak
- Source :
- Chinese Physics C. 37:126001
- Publication Year :
- 2013
- Publisher :
- IOP Publishing, 2013.
-
Abstract
- A compact neutron spectrometer based on the liquid scintillator is presented for neutron energy spectrum measurements at the HL-2A tokamak. The spectrometer was well characterized and a fast digital pulse shape discrimination software was developed using the charge comparison method. A digitizer data acquisition system with a maximum frequency of 1 MHz can work under an environment with a high count rate at HL-2A tokamak. Specific radiation and magnetic shielding for the spectrometer were designed for the neutron spectrum measurement at the HL-2A tokamak. For pulse height spectrum analysis, dedicated numerical simulation utilizing NUBEAM combined with GENESIS was performed to obtain the neutron energy spectrum. Subsequently, the transportation process from the plasma to the detector was evaluated with Monte Carlo calculations. The distorted neutron energy spectrum was folded with the response matrix of the liquid scintillation spectrometer, and good consistency was found between the simulated and measured pulse height spectra. This neutron spectrometer based on a digital acquisition system could be well adopted for the investigation of the auxiliary heating behavior and the fast-ion related phenomenon on different tokamak devices.<br />Comment: 17 pages,9 figures
- Subjects :
- Physics
Nuclear and High Energy Physics
Physics - Instrumentation and Detectors
Tokamak
Spectrometer
Physics::Instrumentation and Detectors
business.industry
Liquid scintillation counting
FOS: Physical sciences
Astronomy and Astrophysics
Instrumentation and Detectors (physics.ins-det)
Radiation
Scintillator
law.invention
Neutron spectroscopy
Optics
law
Electromagnetic shielding
Neutron
Nuclear Experiment (nucl-ex)
Nuclear Experiment
business
Instrumentation
Subjects
Details
- ISSN :
- 16741137
- Volume :
- 37
- Database :
- OpenAIRE
- Journal :
- Chinese Physics C
- Accession number :
- edsair.doi.dedup.....0a7d845f7fd27664d42dc1aa2b734826