Oak Ridge, Tennessee, USA
The SNS target modules are stainless steel vessels through which the liquid mercury target material flows. Neutrons are produced through spallation reactions between the high energy proton beam impact with the mercury. The peak power of the proton beam reaches 25 GW and the corresponding energy deposition in the SNS mercury target is estimated to be ~ 10 MJ/m^3/pulse. Meanwhile, the intense heating of the mercury from individual proton pulses induces a large pressure increase in the liquid metal, which cause displacements and stresses to occur in the containment structure. To fully understand the dynamic response of the target during operation, it is important to experimentally measure the target strain response during/after the proton pulse injection. Due to the space limitation and the existence of strong electromagnetic field induced by the proton beam, fiber-optic sensors are the unique choice for the strain measurement.
The Neutron Sciences Directorate (NScD) at Oak Ridge National Laboratory (ORNL) operates the High Flux Isotope Reactor (HFIR), the United States’ highest flux reactor based neutron source, and the Spallation Neutron Source (SNS), the world’s most intense pulsed accelerator based neutron source. Together these facilities operate 30 instruments for neutron scattering research, each year carrying out in excess of 1,000 experiments in the physical, chemical, materials, biological and medical sciences for more than 3,000 visiting scientists. HFIR also provides unique facilities for isotope production and neutron irradiation. To learn more about Neutron Sciences at ORNL go to: http://neutrons.ornl.gov.
Measures of Effectiveness
Preferred Qualifications: – Previous experience in fiber optics or fiber sensors is desirable. – LabView programming skill is advantageous.
This position will remain open for a minimum of 5 days after which it will close when a qualified candidate is identified and/or
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