scholarly journals Investigation of the proton beam entry window cooling of liquid metal target of spallation neutron source using infrared thermography

2007 ◽  
Author(s):  
J. A. Patorski ◽  
F. Groeschel
Keyword(s):  
Liquid Metal ◽  
Proton Beam ◽  
Infrared Thermography ◽  
Neutron Source ◽  
Spallation Neutron Source ◽  
Metal Target ◽  
Entry Window

Integration of Proton Beam Collimation Scheme in the Spallation Neutron Source (SNS) Accumulator Ring Including Dose and Activation Estimates

2004 ◽  
Author(s):  
Nicholas Simos ◽  
Hans Ludewig ◽  
D. Raparia ◽  
N. Catalan-Lasheras ◽  
S. Cousineau ◽  
...  
Keyword(s):  
Proton Beam ◽  
Neutron Source ◽  
High Energy ◽  
Ring Structure ◽  
Integration Scheme ◽  
Spallation Neutron Source ◽  
Energy Beam ◽  
Optimization Study ◽  
Ring Section ◽  
Final Proton

This paper details the integration scheme as well as the induced activation by the proton beam clean-up system (collimation) in the accumulator ring section of the Spallation Neutron Source (SNS) accelerator complex. Specifically, the results of the optimization study in terms of satisfying both the optics of the proton beam and the minimization of activation of the accelerator components as well as of the surrounding structure have guided both the design of the components and their integration and are presented in this paper. The resulted collimation scheme is a two-stage clean-up system consisting of proton beam halo intercepting scrapers and appropriate fixed aperture absorbers. The accumulator ring structure consists of the High Energy Beam Transfer (HEBT) line which receives the 1 GeV proton beam from the SNS LINAC accelerator, the accumulator ring itself which compiles the micro-pulses into the final 60 Hz pulse, and the RTBT line that transfers the final proton pulse to the accelerator target. Collimation takes place in all three ring components and along respective straight sections with the exception of the off-momentum particle clean-up in the HEBT line in which off-momentum protons are guided to a stationary absorber outside the transfer line. Given that the activation issues of the collimating structures themselves as well as of the nearby accelerator components (mainly magnets) are similar in all sections of the ring, the activation of components in the ring clean-up system will be discussed in detail in the following sections.

Thermal Hydraulic Analysis of China Spallation Neutron Source Target System Under Abnormal Situations

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Jun-Hong Hao ◽  
Qun Chen ◽  
You-Lian Lu ◽  
Song-Lin Wang ◽  
Quan-Zhi Yu ◽  
...  
Keyword(s):  
Proton Beam ◽  
Neutron Source ◽  
Cooling Water ◽  
Normal Operation ◽  
Maximum Temperature ◽  
Target System ◽  
Monte Carlo Code ◽  
Operating Pressure ◽  
Spallation Neutron Source ◽  
Power Failure

The analysis of thermal hydraulic performance under three abnormal conditions is very important for the design of China spallation neutron source (CSNS) target system, which could provide some important information for developing an emergency plan. In this study, we first introduce the design of the CSNS target system and create a three-dimensional physical model, calculate the heat source and decay heat distribution using the MCNPX 2.5 Monte Carlo code and the CINDER’90 activation code, and simulate and analyze the temperature distribution in the tungsten target and the steel container under normal operation using fluent. By using the same model, the thermal hydraulic characteristics are analyzed under three different abnormal conditions including power failure, off-center of proton beam, and cooling water failure. The results show that in order to keep the cooling water temperature below the boil point at normal operating pressure, the emergency power for the cooling water should start immediately after power failure. The maximum temperature of the beam window and the up plate increases by about 8 °C when the offsetting distance of proton beam is 5 mm along z direction. The cooling water will not effectively take all away the heat when the flow rate of the cooling water drops below 72% of the normal setpoint.

Initial observations of cavitation-induced erosion of liquid metal spallation target vessels at the Spallation Neutron Source

2012 ◽  
Vol 431 (1-3) ◽  
pp. 147-159 ◽  
Author(s):  
D.A. McClintock ◽  
B.W. Riemer ◽  
P.D. Ferguson ◽  
A.J. Carroll ◽  
M.J. Dayton
Keyword(s):  
Liquid Metal ◽  
Neutron Source ◽  
Spallation Neutron Source ◽  
Spallation Target

Characterization of an explosively bonded aluminum proton beam window for the Spallation Neutron Source

2014 ◽  
Vol 450 (1-3) ◽  
pp. 163-175
Author(s):  
David A. McClintock ◽  
Jim G. Janney ◽  
Chad M. Parish
Keyword(s):  
Proton Beam ◽  
Neutron Source ◽  
Spallation Neutron Source
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