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Derniers ajouts:
2018-10-19
04:23
Test of Ultra Fast Silicon Detectors for Picosecond Time Measurements with a New Multipurpose Read-Out Board / Minafra, Nicola (Kansas U.) ; Al Ghoul, Hussein (Kansas U.) ; Arcidiacono, Roberta (Piemonte Orientale U., Alessandria ; INFN, Turin) ; Cartiglia, Nicolo (INFN, Turin) ; Forthomme, Laurent (Kansas U.) ; Mulargia, Roberto (INFN, Turin ; Turin U. ; INFN, Turin) ; Obertino, Maria (Turin U. ; INFN, Turin) ; Royon, Christophe (Kansas U.)
Ultra Fast Silicon Detectors (UFSD) are sensors optimized for timing measurements employing a thin multiplication layer to increase the output signal. A multipurpose read-out board hosting a low-cost, low-power fast amplifier was designed at the University of Kansas and tested at the European Organization for Nuclear Research (CERN) using a 180 GeV pion beam. [...]
arXiv:1704.05298.- 2017-09-21 - 5 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 867 (2017) 88-92 Preprint: PDF;

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2018-10-17
06:01
White Rabbit Clock Synchronization: Ultimate Limits on Close-In Phase Noise and Short-Term Stability Due to FPGA Implementation / Rizzi, Mattia (CERN) ; Lipinski, Maciej (CERN) ; Ferrari, Paolo (U. Brescia) ; Rinaldi, Stefano (U. Brescia) ; Flammini, Alessandra (U. Brescia)
This paper investigates the ultimate limits of White Rabbit (WR), an high-accuracy time distribution system based on field-programmable gate array (FPGA). The knowledge of such limits is essential for new emerging applications that are evaluating WR. [...]
2018 - 12 p. - Published in : IEEE Trans. Ultrason., Ferroelectr. Freq. Control 65 (2018) 1726-1737

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2018-10-17
06:01
iMPACT: An Innovative Tracker and Calorimeter for Proton Computed Tomography / Mattiazzo, Serena (Padua U. ; TIFPA-INFN, Trento) ; Baruffaldi, Filippo (Padua U.) ; Bisello, Dario (Padua U. ; TIFPA-INFN, Trento) ; Di Ruzza, Benedetto (Bari Polytechnic) ; Giubilato, Piero (Padua U. ; TIFPA-INFN, Trento) ; Iuppa, Roberto (Trento U. ; TIFPA-INFN, Trento) ; La Tessa, Chiara (Trento U. ; TIFPA-INFN, Trento) ; Pantano, Devis (Padua U. ; TIFPA-INFN, Trento) ; Pozzobon, Nicola (Padua U. ; TIFPA-INFN, Trento) ; Ricci, Ester (Trento U. ; TIFPA-INFN, Trento) et al.
This contribution describes the first results obtained within the iMPACT project, which aims to build a novel proton computed-tomography (pCT) scanner for protons of energy up to 230 MeV, as used in hadron therapy. The iMPACT pCT scanner will improve the current state-of-the-art in proton tracking at all levels: speed, spatial resolution, material budget, and cost. [...]
2018 - 8 p. - Published in : IEEE Trans. Rad. Plasma Med. Sci. 2 (2018) 345-352

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2018-10-17
06:01
Modular Multilevel Converter Grid Interface for Klystron Modulators: An Augmented Modulation Scheme for Arm Balancing / Jankovic, Marija (Nottingham U.) ; Costabeber, Alessandro (Nottingham U.) ; Watson, Alan (Nottingham U.) ; Clare, Jon C (Nottingham U.) ; Aguglia, Davide (CERN)
This paper discusses the control of a modular multilevel converter (MMC) used as a grid interface for the klystron modulators in the compact linear collider (CLIC). The converter has a DC side load which takes short-duration power pulses, causing high DC side power fluctuations that are not tolerable if seen by the AC grid. [...]
2018 - 9 p. - Published in : IEEE Trans. Plasma Sci. 46 (2018) 3325-3333

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2018-10-17
06:01
A high-precision miniaturized rotating coil transducer for magnetic measurements / Arpaia, P (U. Naples (main) ; CERN) ; Buzio, M (CERN) ; De Oliveira, R (CERN) ; DiMarco, J (Fermilab) ; Severino, G (Sannio U.)
A miniaturized Printed Circuit Board (PCB) sensing coil, jointly developed by CERN and Fermilab for measuring the field of small-gap (less than 10 mm) accelerator magnets, is illustrated. A sensing coil array, with a scheme for compensating the main field when measuring the harmonic error components, hosted on a synthetic sapphire-based transducer, is presented. [...]
FERMILAB-PUB-18-209-TD.- 2018 - 13 p. - Published in : Sens. Actuators A 274 (2018) 37-49 Fulltext: openaccess_1-s2.0-S0924424717317533-main - PDF; fermilab-pub-18-209-td - PDF; External link: FERMILABPUB

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2018-10-17
06:01
Experimental ion mobility measurements for the LCTPC collaboration—Ar-CF$_4$ mixtures / Santos, M A G (LIP, Coimbra ; Coimbra U.) ; Kaja, M A (Warsaw U. of Tech.) ; Cortez, A F V (LIP, Coimbra ; Coimbra U.) ; Veenhof, R (CERN ; Uludag U. ; Moscow Phys. Eng. Inst.) ; Neves, P N B (Closer Consultoria, Lisbon) ; Santos, F P (LIP, Coimbra ; Coimbra U.) ; Borges, F I G M (LIP, Coimbra ; Coimbra U.) ; Conde, C A N (LIP, Coimbra ; Coimbra U.)
In this paper we present the results of the ion mobility measurements made in pure carbon tetrafluoride (CF$_4$) and gaseous mixtures of argon with carbon tetrafluoride (Ar-CF$_4$) for pressures ranging from 6 to 10 Torr (8–10.6 mbar) and for low reduced electric fields in the 10 Td to 25 Td range ($2.4-6.1 \text{kV} \cdot \text{cm}^{−1} \cdot \text{bar}^{−1}$), at room temperature. The time of arrival spectra revealed only one peak throughout the entire range studied which was attributed to CF$^+_3$. [...]
2018 - 13 p. - Published in : JINST 13 (2018) P04012 Fulltext: PDF;

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2018-10-17
06:01
Cross-wake force and correlated head-tail instability in beam-beam collisions with a large crossing angle / Kuroo, Nami (KEK, Tsukuba ; Tsukuba U. (main)) ; Ohmi, Kazuhito (KEK, Tsukuba) ; Oide, Katsunobu (KEK, Tsukuba ; CERN) ; Zhou, Demin (KEK, Tsukuba ; CERN) ; Zimmermann, Frank (CERN)
This paper discusses novel coherent beam-beam instability in collisions with a large crossing angle. The instability appears in the correlated head-tail motion of two colliding beams. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 031002 Fulltext: PDF;

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2018-10-17
06:01
Beam measurement of the high frequency impedance sources with long bunches in the CERN Super Proton Synchrotron / Lasheen, A (CERN ; Orsay) ; Argyropoulos, T (CERN) ; Bohl, T (CERN) ; Esteban Müller, J  F (CERN) ; Timko, H (CERN) ; Shaposhnikova, E (CERN)
Microwave instability in the Super Proton Synchrotron (SPS) at CERN is one of the main limitations to reach the requirements for the High Luminosity-LHC project (increased beam intensity by a factor 2). To identify the impedance source responsible of the instability, beam measurements were carried out to probe the SPS impedance. [...]
2018 - 13 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 034401 Fulltext: PDF;

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2018-10-17
06:01
Proton beam induced dynamics of tungsten granules / Caretta, O (Rutherford) ; Loveridge, P (Rutherford) ; O'Dell, J (Rutherford) ; Davenne, T (Rutherford) ; Fitton, M (Rutherford) ; Atherton, A (Rutherford) ; Densham, C (Rutherford) ; Charitonidis, N (CERN) ; Efthymiopoulos, I (CERN) ; Fabich, A (CERN) et al.
This paper reports the results from single-pulse experiments of a 440  GeV/$c$ proton beam interacting with granular tungsten samples in both vacuum and helium environments. Remote high-speed photography and laser Doppler vibrometry were used to observe the effect of the beam on the sample grains. [...]
2018 - 15 p. - Published in : Phys. Rev. Accel. Beams 21 (2018) 033401 Fulltext: PDF;

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2018-10-17
06:01
Metal-core pad-plane development for ACTAR TPC / Giovinazzo, J (CENBG, Gradignan) ; Pibernat, J (CENBG, Gradignan) ; Goigoux, T (CENBG, Gradignan) ; de Oliveira, R (CERN) ; Grinyer, G F (Regina U. ; GANIL) ; Huss, C (CENBG, Gradignan) ; Mauss, B (GANIL) ; Pancin, J (GANIL) ; Pedroza, J L (CENBG, Gradignan) ; Rebii, A (CENBG, Gradignan) et al.
With the recent development of active targets and time projection chambers (ACTAR TPC) as detectors for fundamental nuclear physics experiments, the need arose for charge collection planes with a high density of readout channels. In order to fulfill the mechanical constraints for the ACTAR TPC device, we designed a pad-plane based on a metal-core circuit with an conceptually simple design and routing for signal readout, named FAKIR (in reference to a fakir bed of nails). [...]
2018 - 8 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 892 (2018) 114-121

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