Mercury Target and Its Peripheral Devices for 1 MW Spallation Neutron Source

2004 ◽  
Author(s):  
Katsuhiro Haga ◽  
Masanori Kaminaga ◽  
Hidetaka Kinoshita ◽  
Hiroyuki Kogawa ◽  
Hiroshi Satoh ◽  
...  
Keyword(s):  
Neutron Source ◽  
High Intensity ◽  
Cross Flow ◽  
High Energy ◽  
Proton Accelerator ◽  
Circulation System ◽  
Design Activity ◽  
Spallation Neutron Source ◽  
Present Design ◽  
Facility Construction

The Japan Atomic Energy Research Institute (JAERI) and the High Energy Accelerator Research Organization (KEK) are promoting a plan to construct a 1MW neutron source facility at the Tokai Research Establishment, JAERI, under the Japan Proton Accelerator Research Complex (J-PARC) Project. In the facility, 1 MW pulsed proton beam from a high-intensity proton accelerator will be injected into a mercury target in order to produce high-intensity pulse neutrons for use in the fields of life and material sciences. In order to realize such a high-power neutron source, the design activity of a cross flow type (CFT) mercury target and its peripheral devices has continued and the results is reflected in the ordering specifications of the facility construction. The arrangement of each component and their structure was optimized through experimental and analytical studies. In this paper, the present design of the mercury target components for 1MW spallation neutron source including the target vessel, a mercury circulation system, and a target trolley will be reported.

scholarly journals Cryogenic design for a high intensity ultracold neutron source at TRIUMF

2019 ◽  
Vol 219 ◽  
pp. 10001
Author(s):  
Shinsuke Kawasaki ◽  
Takahiro Okamura ◽  
Keyword(s):  
Heat Transport ◽  
Neutron Source ◽  
Superfluid Helium ◽  
High Intensity ◽  
Cold Neutron ◽  
Spallation Neutron Source ◽  
Cold Neutrons ◽  
Kapitza Conductance ◽  
Neutron Converter ◽  
Ultra Cold Neutron

The TUCAN (TRIUMF Ultra-Cold Advanced Neutron) collaboration has been developing a source of high-intensity ultra-cold neutrons for use in a neutron electric dipole search. The source is composed of a spallation neutron source and a superfluid helium ultra-cold neutron converter, surrounded by a cold moderator. The temperature of the superfluid helium needs to be maintained at approximately 1.0 K to suppress up-scattering by phonons. The Kapitza conductance and the heat transport by the superfluid helium are key parameters which need to be well characterized. We have therefore investigated them in first experiments. Current efforts are directed at optimizing the design of the helium cryostat.

High Energy Neutron Dosimetry of a Spallation Neutron Source

2008 ◽  
pp. 488-488-10
Author(s):  
F Hegedüs ◽  
WV Green ◽  
P Stiller ◽  
S Green ◽  
V Herrnberger ◽  
...  
Keyword(s):  
Neutron Source ◽  
High Energy ◽  
Spallation Neutron Source ◽  
Neutron Dosimetry ◽  
High Energy Neutron ◽  
Energy Neutron

scholarly journals Simulating neutron transport in long beamlines at a spallation neutron source using Geant4

2020 ◽  
Vol 22 (2-3) ◽  
pp. 183-189
Author(s):  
Douglas D. DiJulio ◽  
Isak Svensson ◽  
Xiao Xiao Cai ◽  
Joakim Cederkall ◽  
Phillip M. Bentley
Keyword(s):  
Monte Carlo ◽  
Neutron Source ◽  
Variance Reduction ◽  
Neutron Transport ◽  
High Energy ◽  
Low Energy ◽  
Deep Penetration ◽  
Monte Carlo Code ◽  
Spallation Neutron Source ◽  
Unique Challenge

The transport of neutrons in long beamlines at spallation neutron sources presents a unique challenge for Monte-Carlo transport calculations. This is due to the need to accurately model the deep-penetration of high-energy neutrons through meters of thick dense shields close to the source and at the same time to model the transport of low- energy neutrons across distances up to around 150 m in length. Typically, such types of calculations may be carried out with MCNP-based codes or alternatively PHITS. However, in recent years there has been an increased interest in the suitability of Geant4 for such types of calculations. Therefore, we have implemented supermirror physics, a neutron chopper module and the duct-source variance reduction technique for low- energy neutron transport from the PHITS Monte-Carlo code into Geant4. In the current work, we present a series of benchmarks of these extensions with the PHITS software, which demonstrates the suitability of Geant4 for simulating long neutron beamlines at a spallation neutron source, such as the European Spallation Source, currently under construction in Lund, Sweden.

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