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FEATURED STORIES - FEBRUARY 2017
"First Principles Modeling of RFQ Cooling System and Resonant Frequency Responses for Fermilab's PIP-II Injector Test" by J. P. Edelen, A. L. Edelen, D. Bowring, B. E. Chase, J. Steimel, S. G. Biedron, and S. V. Milton In this paper we develop an a priori method for simulating dynamic resonant frequency and temperature responses in a radio frequency quadrupole (RFQ) and its associated water-based cooling system respectively. Our model provides a computationally efficient means to evaluate the transient response of the RFQ over a large range of system parameters. The model was constructed prior to the delivery of the PIP-II Injector Test RFQ and was used to aid in the design of the water-based cooling system, data acquisition system, and resonance control system. Now that the model has been validated with experimental data, it can confidently be used to aid in the design of future RFQ resonance controllers and their associated water-based cooling systems. Without any empirical fitting, it has demonstrated the ability to predict absolute temperature and frequency changes to 11% accuracy on average, and relative changes to 7% accuracy. more...

"Simplified SEE Sensitivity Screening for COTS Components in Space" by Rubén García Alía, Markus Brugger, Eamonn Daly, Salvatore Danzeca, Véronique Ferlet-Cavrois, Rémi Gaillard, Julien Mekki, Christian Poivey, and Ali Zadeh We introduce an approach aimed at prescreening COTS components according to their single-event effect (SEE) sensitivity for space missions in which a complete characterization of their individual response to protons and heavy ions is not feasible due to cost and time constraints. The method is applied to a set of SRAM memories for single-event upset (SEU) and single-event latchup (SEL) and the resulting expected SEE rates are compared with traditional approaches and in-flight data for a low-earth orbit polar and a geostationary orbit. Despite the limitations related to components with high-LET threshold and thick sensitive volumes, we conclude that the proposed method can be an efficient means of rejecting highly sensitive components or lots and performing the complete characterization only on passing devices. more...

"Stabilization of Particle Discrimination Efficiencies for Neutron Spectrum Unfolding With Organic Scintillators" by Chris C. Lawrence, J. K. Polack, Michael Febbraro, J. J. Kolata, Marek Flaska, S. A. Pozzi, and F. D. Becchetti The literature discussing pulse-shape discrimination (PSD) in organic scintillators dates back several decades. However, little has been written about PSD techniques that are optimized for neutron spectrum unfolding. Variation in n-γ misclassification rates and in γ/n ratio of incident fields can distort the neutron pulse-height response of scintillators and these distortions can in turn cause large errors in unfolded spectra. New applications in arms-control verification call for detection of lower-energy neutrons, for which PSD is particularly problematic. In this article, we propose techniques for removing distortions on pulse-height response that result from the merging of PSD distributions in the low-pulse-height region. These techniques take advantage of the repeatable shapes of PSD distributions that are governed by the counting statistics of scintillation-photon populations. We validate the proposed techniques using accelerator-based time-of-flight measurements and then demonstrate them by unfolding the Watt spectrum from measurement with a ^252Cf neutron source more...



A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY
FEBRUARY 2017 \| VOLUME 64 \| NUMBER 2 \| IETNAE \| (SSN 0018-9499)
PART I OF TWO PARTS
REGULAR PAPERS Validation of Geant4 on Proton Transportation for Thick Absorbers: Study Based on Tschalär Experimental Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G. Hoff, V. Denyak, H. R. Schelin, and S. Paschuk Stabilization of Particle Discrimination Efficiencies for Neutron Spectrum Unfolding With Organic Scintillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. C. Lawrence, J. K. Polack, M. Febbraro, J. J. Kolata, M. Flaska, S. A. Pozzi, and F. D. Becchetti Solution-Grown Rubrene Crystals as Radiation Detecting Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. Carman, H. P. Martinez, L. Voss, S. Hunter, P. Beck, N. Zaitseva, S. A. Payne, P. Irkhin, H. H. Choi, and V. Podzorov A Front-End Channel in 65 nm CMOS for Pixel Detectors at the HL-LHC Experiment Upgrades . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. Ratti, F. De Canio, L. Gaioni, M. Manghisoni, V. Re, and G. Traversi First Principles Modeling of RFQ Cooling System and Resonant Frequency Responses for Fermilab’s PIP-II Injector Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. P. Edelen, A. L. Edelen, D. Bowring, B. E. Chase, J. Steimel, S. G. Biedron, and S. V. Milton Accurate Electromagnetic Simulation and Design of Cyclotron Cavity . . . . . . . . . . . . . . . M. Mohamadian, H. Afarideh, and M. Ghergherehchi Position Error Correction Using Homography in Discretized Positioning Circuit for Gamma-Ray Imaging Detection System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S.-J. Jeon, J. Kim, M.-G. Ji, J.-H. Park, and Y.-W. Choi A Novel Read-Out Electronics Design Based on 1-Bit Sigma-Delta Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Z. Zhao, Q. Huang, Z. Gong, Z. Su, W. W. Moses, J. Xu, and Q. Peng The Effect of Non-Uniform Temperature and Velocity Fields on Long Range Ultrasonic Measurement Systems in MYRRHA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. Van De Wyer, C. Schram, D. Van Dyck, and M. Dierckx Calorimetric Analysis to Infer Primary Circuit Flow in Integral and Pool-Type Reactors . . . . . . . . . . . . . . . . J. Coble, R. Tarver, and J. W. Hines Measurement and Analysis of Structural Integrity of Reactor Core Support Structure in Pressurized Water Reactor (PWR) Plant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. A. Ansari, M. Haroon, A. Rashid, and Z. Kazmi High Gamma Ray Tolerance for 4H-SiC Bipolar Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. S. Suvanam, S.-I. Kuroki, L. Lanni, R. Hadayati, T. Ohshima, T. Makino, A. Hallén, and C.-M. Zetterling Active Precharge Hammering to Monitor Displacement Damage Using High-Energy Protons in 3x-nm SDRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C. Lim, K. Park, and S. Baeg Study of the Performance of the Micromegas Chambers for the ATLAS Muon Spectrometer Upgrade . . . . . . . . . . . . . . . . . . . . . . . . M. Vanadia Analyzing Reliability and Performance Trade-Offs of HLS-Based Designs in SRAM-Based FPGAs Under Soft Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . L. A. Tambara, J. Tonfat, A. Santos, F. Lima Kastensmidt, N. H. Medina, N. Added, V. A. P. Aguiar, F. Aguirre, and M. A. G. Silveira Simplified SEE Sensitivity Screening for COTS Components in Space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . R. G. Alía, M. Brugger, E. Daly, S. Danzeca, V. Ferlet-Cavrois, R. Gaillard, J. Mekki, C. Poivey, and A. Zadeh

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"First Principles Modeling of RFQ Cooling System and Resonant Frequency Responses for Fermilab's PIP-II Injector Test"

"Simplified SEE Sensitivity Screening for COTS Components in Space"

"Stabilization of Particle Discrimination Efficiencies for Neutron Spectrum Unfolding With Organic Scintillators"

A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY