In this paper we report on the development of an ASIC for readout of position sensitive neutron detectors based on low-pressure Micro-Strip Gas Chambers with solid composite 157 Gd/CsI converter. Global counting rate...
详细信息
In this paper we report on the development of an ASIC for readout of position sensitive neutron detectors based on low-pressure Micro-Strip Gas Chambers with solid composite 157 Gd/CsI converter. Global counting rates of 10 8 cps for a detector area of 25×25 cm 2 covered with 400×400 strips requiring 2 ns time resolution for coincidences of signals from X- and Y-strips set very demanding requirements for the ASIC performance.
作者：
N. AbelJ. AdamczewskiD. AdamovaM.M. AggarwalN. AhmadZ. AhmadA. AkindinovP. AkishinE. AkishinaT. AkishinaM. Al-TuranyM. AlyushinS. Amar-YoucefV. AmmosovM. AnđelićC. AndreiA. AndronicYu. AnisimovK. AntipinH. AppelshäuserV. ZrjuevHeidelberg
Germany Physikalisches Institut Universität Heidelberg Dresden
Germany Institut für Strahlenphysik Forschungszentrum Dresden-Rossendorf (FZD) Aligarh
India Department of Physics Aligarh Muslim University Hefei
China Department of Modern Physics University of Science & Technology of China (USTC) Seoul
Korea Department of Physics Korea University Coimbra
Portugal Laboratório de Instrumentação e Física Experimental de Partículas (LIP) Beijing
China Department of Engineering Physics Tsinghua University Bhubaneswar
India Institute of Physics Kraków
Poland Faculty of Electrical Engineering Automatics Computer Science and Electronics Department of Measurement and Instrumentation AGH University of Science and Technology Moscow
Russia Skobeltsyn Institute of Nuclear Phyiscs Lomonosov Moscow State University (SINP-MSU) Frankfurt
Germany Institut für Kernphysik Universität Frankfurt Dubna
Russia Veksler and Baldin Laboratory of High Energies Joint Institute for Nuclear Research (JINR-VBLHE) Münster
Germany Institut für Kernphysik Westfälische Wilhelms Universität Münster Gatchina
Russia Petersburg Nuclear Physics Institute (PNPI) Pusan
Korea Pusan National University (PNU) Srinagar
India Department of Physics University of Kashmir Bucharest
Romania Atomic and Nuclear Physics Department University of Bucharest Dubna
Russia Laboratory of Particle Physics Joint Institute for Nuclear Research (JINR-LPP)
Conversion electron Mössbauer spectroscopy proved in the past to be very useful in studying surface and ultrathin film magnetism with, monolayer resolution. Twenty years later, its time-domain analogue, the nucle...
详细信息
Conversion electron Mössbauer spectroscopy proved in the past to be very useful in studying surface and ultrathin film magnetism with, monolayer resolution. Twenty years later, its time-domain analogue, the nuclear resonant scattering (NRS) of synchrotron radiation, showed up to be by orders of magnitude faster and more efficient. The most important features of NRS based on simulations and experimental data have been discussed. It has been shown how the isotopic sensitivity of NRS, combined with the 57Fe probe layer concept, was explored to study influence of the interlayer exchange coupling to FeAu monoatomic superlattices on the magnetic properties of the iron monolayer on Au(001). In the second example, combination of UHV conditions and the high brilliance of the third generation synchrotron source is used to probe the evolution of spin structure in epitaxial Fe films on W(110) via the accumulation of high quality time spectra directly during the 57Fe film growth.
Quantum cryptography enables one to verify that the state of the quantum system has not been tampered with and thus one can obtain privacy regardless of the power of the eavesdropper. All previous protocols relied on ...
详细信息
Quantum cryptography enables one to verify that the state of the quantum system has not been tampered with and thus one can obtain privacy regardless of the power of the eavesdropper. All previous protocols relied on the ability to faithfully send quantum states or equivalently to share pure entanglement. Here we show this need not be the case—one can obtain verifiable privacy even through some channels which cannot be used to reliably send quantum states.
The readout electronics for the luminosity detector (LumiCal) at ILC is discussed. First, the challenges of LumiCal and the proposed solutions are described together with the overall readout architecture chosen. Then ...
详细信息
The readout electronics for the luminosity detector (LumiCal) at ILC is discussed. First, the challenges of LumiCal and the proposed solutions are described together with the overall readout architecture chosen. Then a more detailed description of the front-end and the analog to digital convertion blocks follows. In particular the design and simulation results of the prototype preamplifier, shaper and basic ADC blocks are presented.
The pressure-induced phase transition in strontium, including the recent experimental observation of high-pressure phase Sr-IV, was investigated theoretically using the projector augmented wave method. We also concent...
The pressure-induced phase transition in strontium, including the recent experimental observation of high-pressure phase Sr-IV, was investigated theoretically using the projector augmented wave method. We also concentrated on the experimentally observed β-tin structure as this structure has never been found in any other alkaline-earth metals. The fcc-bcc phase transition was reproduced, but Sr-IV was found to be energetically more stable than the β-tin structure at all pressures. By considering enthalpy, the sequence of the phase transitions along the pressure range is fcc→bcc→Sr-IV. With some detailed examination, we concluded that the β-tin structure is either a metastable state or a coexisting phase, and further experimental investigation is suggested.
We discuss how various models of scale-free complex networks approach their limiting properties when the size N of the network grows. We focus mainly on equilibrated networks and their finite-size degree distributions...
详细信息
We discuss how various models of scale-free complex networks approach their limiting properties when the size N of the network grows. We focus mainly on equilibrated networks and their finite-size degree distributions. Our results show that the position of the cutoff in the degree distribution, kcutoff, scales with N in a different way than predicted for N→∞; that is, subleading corrections to the scaling kcutoff∼Nα are strong even for networks of order N∼109 nodes. We observe also a logarithmic correction to the scaling for degenerated graphs with the degree distribution π(k)∼k−3. On the other hand, the distribution of the maximal degree kmax may have a different scaling than the cutoff and, moreover, it approaches the thermodynamic limit much faster. We argue that kmax∼Nα′ with an exponent α′=min[α,1∕(γ−1)], where γ is the exponent in the power law π(k)∼k−γ. We also present some results on the cutoff function and the distribution of the maximal degree in equilibrated networks.
Summary: In the present work knowledge the authors tried to direct the phase separation process in a thin polymer composite film to manufacture a polymer pattern via self organisation of the blend components. The Au s...
详细信息
Summary: In the present work knowledge the authors tried to direct the phase separation process in a thin polymer composite film to manufacture a polymer pattern via self organisation of the blend components. The Au substrate was modified by applying with a PDMS stamp a pattern of alternating stripes of a self-assembled monolayer. This in turn influenced the microstructure of the blend, allowing for the production of elongated domains repeating the pattern of the substrate. The blends studied in this work contained conducting polyaniline doped with camphorsulfonic acid or diphenyl phosphate and polystyrene. The role of the dopant was to induce electrical conductivity in polyaniline as well as to improve its solubility in common organic solvents. The microstructure of thin films was analysed using atomic force microscopy (AFM), dynamic secondary ion mass spectroscopy (dSIMS) and optical microscopy.
暂无评论