2018-05-26
06:12 |
Quadrupole moment of $^{203}$Fr
/ Wilkins, S G (Manchester U.) ; Lynch, K M (CERN) ; Billowes, J (Manchester U.) ; Binnersley, C L (Manchester U.) ; Bissell, M L (Manchester U.) ; Cocolios, T E (KU Leuven, Dept. Phys. Astron.) ; Day Goodacre, T (Manchester U. ; CERN) ; de Groote, R P (KU Leuven, Dept. Phys. Astron.) ; Farooq-Smith, G J (KU Leuven, Dept. Phys. Astron.) ; Flanagan, K T (Manchester U.) et al.
The spectroscopic electric quadrupole moment of the neutron-deficient francium isotope 203Fr was measured by using high-resolution collinear resonance ionization spectroscopy (CRIS) at the CERN Isotope Separation OnLine Device (ISOLDE) facility. A remeasurement of the 207Fr quadrupole moment was also performed, resulting in a departure from the established literature value. [...]
2017 - 6 p.
- Published in : Phys. Rev. C 96 (2017) 034317
Fulltext: PDF;
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2018-05-26
06:12 |
A 2D pixel detector for very high-rate X- and gamma-ray spectroscopy and imaging
/ Nygård, Einar (Enxense AS, Asker) ; Malakhov, Nail (Enxense AS, Asker) ; Weilhammer, Peter (CERN ; Enxense AS, Asker) ; Dorholt, Ole (U. Oslo (main)) ; Røhne, Ole M (U. Oslo (main)) ; Nagano, Terumasa ; Yamamoto, Koei (Hamamatsu Photonics)
A new methodology for very high-speed, energy-dispersive detection of X-ray fluorescence is being developed. The underlying reasoning behind it, as well as early results from the evaluation of the first prototype, is presented..
2017 - 7 p.
- Published in : Powder Diffraction 32 (2017) 133-139
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2018-05-26
06:12 |
The CERN/ISOLDE Laser Ion Source
/ Marsh, B A (CERN) ; Fedosseev, V N (CERN) ; Chrysalidis, K (CERN) ; Day Goodacre, T (CERN) ; Larmonier, P (CERN) ; Rossel, R E (CERN) ; Rothe, S (CERN) ; Seiffert, C (CERN) ; Wendt, K (Mainz U., Inst. Phys.)
Laser resonance photo-ionization an essential aspect of radioactive ion beam production for fundamental and applied physics research. The laser ion source of the ISOLDE facility, described here, is the most versatile of its type worldwide..
2017
- Published in : 10.1364/CLEO_SI.2017.SF1K.5
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2018-05-26
06:12 |
Accelerating high-energy physics exploration with deep learning
/ Ojika, Dave (U. Florida, Gainesville (main)) ; Acosta, Darin (U. Florida, Gainesville (main)) ; Gordon-Ross, Ann (U. Florida, Gainesville (main)) ; Carnes, Andrew (U. Florida, Gainesville (main)) ; Gleyzer, Sergei (CERN)
In this work, we present our approach to using deep learning for identification of rarely produced physics particles (such as the Higgs Boson) out of a majority of uninteresting, background or noise-dominated data. A fast and efficient system to eliminate uninteresting data would result in much less data being stored, thus significantly reducing processing time and storage requirements. [...]
2017 - 4 p.
- Published in : 10.1145/3093338.3093340
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2018-05-26
06:12 |
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2018-05-25
07:03 |
Effects of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source
/ Abe, S (Keio U.) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Hatayama, A (Keio U.) ; Lettry, J (CERN)
In order to understand the H$^−$ extraction mechanism and investigate the effect of the extraction voltage applied by the puller-electrode on the H$^−$ extraction in the Linac4 negative ion source, we are developing a 2D3V-PIC (two dimensions in the real space and three dimensions in the velocity space, Particle in Cell) model with volume produced H$^−$ ions. It is shown that how to take the magnetic filter field direction is important for the 2D modeling to take into account the important 3D effect of electron $E \times B$ drift. [...]
2017 - 8 p.
- Published in : AIP Conf. Proc. 1869 (2017) 030051
In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030051
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2018-05-25
07:03 |
Investigation of the RF efficiency of inductively coupled hydrogen plasmas at 1 MHz
/ Rauner, D (Garching, Max Planck Inst. Plasmaphys. ; U. Augsburg (main)) ; Mattei, S (CERN ; CRPP, Lausanne) ; Briefi, S (U. Augsburg (main)) ; Fantz, U ; Hatayama, A (Garching, Max Planck Inst. Plasmaphys. ; U. Augsburg (main)) ; Lettry, J (CERN) ; Nishida, K (Keio U.) ; Tran, M Q (CRPP, Lausanne)
The power requirements of RF heated sources for negative hydrogen ions in fusion are substantial, which poses strong demands on the generators and components of the RF circuit. Consequently, an increase of the RF coupling efficiency would be highly beneficial. [...]
2017 - 8 p.
- Published in : AIP Conf. Proc. 1869 (2017) 030035
In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030035
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2018-05-25
07:03 |
Analyzing the impact of radiation-induced failures in flash-based APSoC with and without fault tolerance techniques at CERN environment
/ Tambara, L A (Rio Grande do Sul U., Porto Alegre (main)) ; Chielle, E (Rio Grande do Sul U., Porto Alegre (main)) ; Kastensmidt, F L (Rio Grande do Sul U., Porto Alegre (main)) ; Tsiligiannis, G (CERN) ; Danzeca, S (CERN) ; Brugger, M (CERN) ; Masi, A (CERN)
All Programmable System-on-Chip (APSoC) devices are designed to provide higher overall programmable flexibility and system performance at lower costs. Such characteristics make APSoCs very suitable and attractive for critical environments, such as the one encountered in the accelerators chain of the European Organization for Nuclear Research (CERN), where electronic components can be exposed to high-energy hadrons (protons, neutrons, pions), heavy ions, and other particles, at the same time. [...]
2017 - 4 p.
- Published in : Microelectron. Reliab. 76-77 (2017) 640-643
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2018-05-25
07:03 |
Current status of GALS setup in JINR
/ Zemlyanoy, S (Dubna, JINR) ; Avvakumov, K (Dubna, JINR) ; Fedosseev, V (CERN) ; Bark, R (iThemba LABS) ; Blazczak, Z (Mickiewicz U., Poznan) ; Janas, Z (Warsaw U.)
This is a brief report on the current status of the new GAs cell based Laser ionization Setup (GALS) at the Flerov Laboratory for Nuclear Reactions (FLNR) of the Joint Institute for Nuclear Research (JINR) in Dubna. GALS will exploit available beams from the U-400M cyclotron in low energy multi-nucleon transfer reactions to study exotic neutron-rich nuclei located in the “north-east” region of nuclear map. [...]
2017 - 10 p.
- Published in : Hyperfine Interact. 238 (2017) 31
In : 10th International Workshop on Application of Lasers and Storage Devices in Atomic Nuclei Research : Recent Achievements and Future Prospects, Poznan, Poland, 16 - 19 May 2016, pp.31
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2018-05-24
06:01 |
Numerical simulation of the RF plasma discharge in the Linac4 H$^−$ ion source
/ Mattei, S (CERN ; CRPP, Lausanne) ; Nishida, K (Keio U.) ; Onai, M (Keio U.) ; Lettry, J (CERN) ; Tran, M Q (CRPP, Lausanne) ; Hatayama, A (Keio U.)
This paper presents a Particle-In-Cell Monte Carlo Collision simulation of the Radio-Frequency (RF) plasma heating in the Linac4 H$^−$ ion source at CERN. The model self-consistently takes into account the electromagnetic field generated by the RF coil, the external static magnetic fields and the resulting plasma response, including a kinetic description of the charged species (e$^−$, H$^+$, H$^+_2$, H$^+_3$, H$^−$), as well as the atomic and molecular (vibrationally resolved) populations. [...]
2017 - 7 p.
- Published in : AIP Conf. Proc. 1869 (2017) 030018
In : 5th International Symposium on Negative Ions, Beams and Sources, Oxford, United Kingdom, 12 - 16 Sep 2016, pp.030018
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