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[en] In an accelerator radiation environment neutron dosimetry and spectrometry face several challenges while carrying out radiological safety analysis. One of the major challenges, specifically in high energy particle accelerators, is the large dynamic range of neutrons that are emitted because of the interactions of energetic projectiles with different target materials. The neutron energies span a wide range from about thermal to about 1 GeV or more. There are many techniques that are adapted to solve this problem leaving scope for further improvement in this area. The present paper describes a newly developed technique based on prompt gamma photo-peak area measurement using a gamma-ray spectrometer. The present work demonstrates utilization of the energy dependent five prompt gamma responses of the Pb-covered BHDPE-HDPE system and the corresponding prompt gamma intensities (areas under the photo peaks) to estimate the incident neutron energy distribution as an under-determined de-convolution problem. Such an under-determined set of equations are solved using the genetic algorithm based Monte Carlo de-convolution code GAMCD
[en] Selected experimental nuclear structure physics results are presented which have been obtained at GSI since the mid 70ties employing the UNILAC and the SIS/FRS accelerator facility. It is shown how stable heavy-ion beams as well as radioactive isotope beams of this facility together with state-of-the-art instrumentation produced many discoveries and led to a multitude of important results covering many aspects of nuclear structure. Finally, we discuss the future directions of nuclear structure research at GSI with the FAIR/NUSTAR project. (invited comment)
[en] J-PARC is a Japanese proton synchrotron accelerator facility, and is under consideration of an upgrade for accelerating heavy ions. A beam rate of about 1011Hz is expected with the upgraded accelerator scheme, with which the QCD phase structure, hadrons under a high baryon density, and multi-strange hypernuclei can be studied. In this paper, we discuss the plan for the upgrade and the conceptual design of the detectors for several physics cases.
[en] This paper focuses on FLUKA Monte Carlo simulations aimed at calculating the dose response of the RadFET dosimeter, when exposed to radiation at the CERN High Energy Accelerator Mixed-field (CHARM) test facility. We study how the dose deposited in the gate oxide (SiO2) of the RadFET is affected by the energy threshold variation in the Monte Carlo simulations as well as the materials and sizes of scoring volumes. Also the characteristics of the input spectra will be taken into account and their impact on the final simulated dose will be studied. Dose variation as a function of the position of the RadFET in the test facility will be then examined and comparisons with experimental results will be shown. The contribution to the total dose due to all particles of the mixed-field, under different target-shielding configurations, is finally presented, aiming at a complete characterization of the RadFET dose response in the CHARM mixed-fields. (authors)
[en] Estimation of neutron dose from particle bombardment on a target material in an accelerator is of immense importance for radiation protection and shielding calculations. In positive ion accelerators, Cu is widely used as beam dump and Cr as a major component of the accelerator grade steel SS-304 (18-20% w/w). The study of emission neutrons from bombardment of different proton (1H) energies on thick Cu, Cr targets will provide precise knowledge regarding the radiological consequences, safety practices to be adopted during and after operations. In the present work, neutron dose measurements were carried out at energies between 10-20 MeV. This will provide important data to ensure safe practices during the advanced commissioning stages and operations for the upcoming low energy high intensity proton accelerator (LEHIPA) facility
[en] The primary mission of the NSUF (Nuclear Science User Facilities) is to provide access, at no cost to the researcher, to world-class, state-of-the art capabilities and expertise to advance nuclear science and technology through high impact research. Through the NSUF, nuclear energy researchers can access specialized and often unique and expensive equipment and facilities, as well as the accompanying expertise, including nuclear test reactors, ion beam accelerators, hot cell post-irradiation examination (PIE) equipment, synchrotron beam lines, and advanced radiologically qualified materials science PIE instrumentation. The NSUF can also support the design and fabrication of an irradiation experiment, the transport of that experiment to and from the reactor, the PIE activities, the analysis and interpretation of the data, and final material disposition. A special feature of the NSUF is its Sample Library of irradiated specimens made available to users that reduces investigation time and costs. Enhancing the Sample Library for future applications of advanced instrumentation and new ideas is a key goal of the NSUF. Similar to the effort on building a Sample Library, the NSUF is creating a searchable database of the infrastructure available to DOE-NE (Department Of Energy - Office of Nuclear Energy) supported researchers
[en] The first Target Fabrication Workshop was held in 2006 in Abingdon, UK. In the intervening years activity in the field has expanded to develop new technologies and encourage young researchers. A lot of the work in Target Fabrication has been published in peer reviewed journals although, arguably, the discipline has still to find a natural home. Consequently it was decided to publish the Conference Proceedings as a standalone volume to both act as a record and also be a future resource. Looking forward the discipline of Target Fabrication appears to be increasingly important for enabling high power/energy laser facilities to deliver cutting edge science. Furthermore with the shift to higher repetition rates one area of growth for laser systems is expected to be into beams and their applications for which, again, Target Fabrication will be key. Additionally experience to date with higher repetition rate laser systems has indicated that the challenge of high rate, high accuracy target positioning is inseparable from that of target production. Consequently a new discipline, which has been called Microtargetry, is beginning to emerge combining the microtarget production and positioning challenges. If Microtargetry grows as anticipated the necessary R and D will require a publication platform and it is hoped that these Conference Proceedings will act as an early indicator. On behalf of my co-editors I would like to thank all who have contributed to these Proceedings. (paper)
[en] The future ̅PANDA detector at FAIR is a state-of-the-art internal target detector designed for strong interaction studies. By utilizing an antiproton beam, a rich and unique physics programme is planned. The ̅PANDA experiment, as well as feasibility studies for hyperon and charmonium physics, are discussed. (paper)
[en] With ever increasing particle beam energies and interaction rates in modern High Energy Physics (HEP) experiments in the present and future accelerator facilities, there has always been the demand for robust Data Acquisition (DAQ) schemes which perform in the harsh radiation environment and handle high data volume. The scheme is required to be flexible enough to adapt to the demands of future detector and electronics upgrades, and at the same time keeping the cost factor in mind. To address these challenges, in the present work, we discuss an efficient DAQ scheme for error resilient, high speed data communication on commercially available state-of-the-art FPGA with optical links. The scheme utilises GigaBit Transceiver (GBT) protocol to establish radiation tolerant communication link between on-detector front-end electronics situated in harsh radiation environment to the back-end Data Processing Unit (DPU) placed in a low radiation zone. The acquired data are reconstructed in DPU which reduces the data volume significantly, and then transmitted to the computing farms through high speed optical links using 10 Gigabit Ethernet (10GbE). In this study, we focus on implementation and testing of GBT protocol and 10GbE links on an Intel FPGA. Results of the measurements of resource utilisation, critical path delays, signal integrity, eye diagram and Bit Error Rate (BER) are presented, which are the indicators for efficient system performance.