Shielding Calculations in Support of the Spallation Neutron Source (SNS) Proton Beam Transport System

2002 ◽  
Author(s):  
Jeffrey O. Johnson
Keyword(s):  
Proton Beam ◽  
Neutron Source ◽  
Transport System ◽  
Spallation Neutron Source ◽  
Beam Transport

Beam measurements on the H− source and low energy beam transport system for the Spallation Neutron Source (abstract)

2002 ◽  
Vol 73 (2) ◽  
pp. 1020-1020
Author(s):  
R. Thomae ◽  
R. Gough ◽  
R. Keller ◽  
K. N. Leung ◽  
T. Schenkel ◽  
...  
Keyword(s):  
Neutron Source ◽  
Transport System ◽  
Low Energy ◽  
Spallation Neutron Source ◽  
Beam Transport ◽  
Energy Beam

scholarly journals Beam measurements on the H− source and low energy beam transport system for the Spallation Neutron Source

2002 ◽  
Vol 73 (5) ◽  
pp. 2016-2019 ◽  
Author(s):  
R. Thomae ◽  
R. Gough ◽  
R. Keller ◽  
K. N. Leung ◽  
T. Schenkel ◽  
...  
Keyword(s):  
Neutron Source ◽  
Transport System ◽  
Low Energy ◽  
Spallation Neutron Source ◽  
Beam Transport ◽  
Energy Beam

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.

Design of the low energy beam transport line for the China spallation neutron source

2008 ◽  
Vol 32 (3) ◽  
pp. 227-231 ◽  
Author(s):  
Li Jin-Hai ◽  
Ouyang Hua-Fu ◽  
Fu Shi-Nian ◽  
Zhang Hua-Shun ◽  
He Wei
Keyword(s):  
Neutron Source ◽  
Low Energy ◽  
Spallation Neutron Source ◽  
Beam Transport ◽  
Energy Beam ◽  
Beam Transport Line ◽  
Transport Line
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