498 research outputs found
Four-gap glass RPC as a candidate to a large area thin time-of-flight detector
A four-gap glass RPC with 0.3mm gap size was tested with hadron beam as a
time-of-flight detector having a time resolution of ~ 100ps. A thickness of the
detector together with front-end electronics is ~ 12mm. Results on time
resolution dependently on a pad size are presented. This paper contains first
result on the timing RPC (with ~ 100ps resolution) having a strip read-out.
Study has been done within the HARP experiment (CERN-PS214) R&D work. A obtaned
data can be useful if a design of a large area thin timing detector has to be
done.Comment: 18 pages, 13 figure
The use of computer decision-making support systems to justify address rehabilitation of the Semipalatinsk test site area
The paper describes the development of a range of optimal protective measures for remediation of the territory of the Semipalatinsk Test Site. The computer system for decision-making support, ReSCA, was employed for the estimations. Costs and radiological effectiveness of countermeasures were evaluated
RPC with low-resistive phosphate glass electrodes as a candidate for the CBM TOF
Usage of electrodes made of glass with low bulk resistivity seems to be a
promising way to adapt the Resistive Plate Chambers (RPC) to the high-rate
environment of the upcoming CBM experiment. A pilot four-gap RPC sample with
electrodes made of phosphate glass, which has bulk resistivity in the order of
10^10 Ohm cm, has been studied with MIP beam for TOF applications. The tests
have yielded satisfactory results: the efficiency remains above 95% and the
time resolution stays within 120 ps up to the particle rate of 18 kHz/cm2. The
increase in rate from 2.25 to 18 kHz/cm2 leads to an increase of estimated
"tails" fraction in the time spectrum from 1.5% to 4%.Comment: 8 pages, 6 figures, submitted to Elsevier Scienc
Revisiting the 'LSND anomaly' II: critique of the data analysis
This paper, together with a preceding paper, questions the so-called 'LSND
anomaly': a 3.8 sigma excess of antielectronneutrino interactions over standard
backgrounds, observed by the LSND Collaboration in a beam dump experiment with
800 MeV protons. That excess has been interpreted as evidence for the
antimuonneutrino to antielectronneutrino oscillation in the \Deltam2 range from
0.2 eV2 to 2 eV2. Such a \Deltam2 range is incompatible with the widely
accepted model of oscillations between three light neutrino species and would
require the existence of at least one light 'sterile' neutrino. In a preceding
paper, it was concluded that the estimates of standard backgrounds must be
significantly increased. In this paper, the LSND Collaboration's estimate of
the number of antielectronneutrino interactions followed by neutron capture,
and of its error, is questioned. The overall conclusion is that the
significance of the 'LSND anomaly' is not larger than 2.3 sigma.Comment: 30 pages, 16 figures, 6 table
Reply to 'Corrections to the HARP-CDP Analysis of the LSND Neutrino Oscillation Backgrounds'
The alleged mistakes in recent papers that reanalyze the backgrounds to the
'LSND anomaly' do not exist. We maintain our conclusion that the significance
of the 'LSND anomaly' is not 3.8 sigma but not larger than 2.3 sigma.Comment: 3 page
Why the paper CERN-PH-EP-2009-015 (arXiv:0903.4762) is scientifically unacceptable
The paper CERN-PH-EP-2009-015 (arXiv:0903.4762) by A. Bagulya et al. violates
standards of quality of work and scientific ethics on several counts. The paper
contains assertions that contradict established detector physics. The paper
falls short of proving the correctness of the authors' concepts and results.
The paper ignores or quotes misleadingly pertinent published work. The paper
ignores the fact that the authors' concepts and results have already been shown
wrong in the published literature. The authors seem unaware that cross-section
results from the 'HARP Collaboration' that are based on the paper's concepts
and algorithms are in gross disagreement with the results of a second analysis
of the same data, and with the results of other experiments.Comment: 8 pages, 3 figure
Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions VII: tin nuclei and beam momenta from \pm3 GeV/c to \pm15 GeV/c
We report on double-differential inclusive cross-sections of the production
of secondary protons, charged pions, and deuterons, in the interactions with a
5% nuclear interaction length thick stationary tin target, of proton and pion
beams with momentum from \pm3 GeV/c to \pm15 GeV/c. Results are given for
secondary particles with production angles between 20 and 125 degrees.
Cross-sections on tin nuclei are compared with cross-sections on beryllium,
carbon, copper, tantalum and lead nuclei.Comment: 68 pages, 13 figure
Звук движущегося точечного источника
Одним з найбільш розповсюджених джерел шуму є транспортні потоки. В багатьох випадках транспортні потоки створюють надмірні рівні шуму, що призводить до збільшення випадків захворювання людей. Велика кількість публікацій [1-3] присвячених цій проблемі, за останній час свідчить, що остаточно дане питання не розв’язане. В статті запропонована математична модель для знаходження часової залежності звукового тиску при рівномірному русі джерела звуку. Одержані результати мають бути враховані при проектуванні шумозахисних екранів.One of the most common noise sources are traffic streams. In many cases traffic streams create excessive levels of noise resulting in an increase of human diseases. Therefore, the task of reducing the level of noise is important and vital. Many scientists have paid attention to this issue, but the large number of publications [1-3] in recent years shows that the issue is not completely resolved. This article discusses finding the time dependence of the sound pressure at the sound source moving.Одним из наиболее распространенных источников шума являются транспортные потоки. Во многих случаях транспортные потоки создают чрезмерные уровни шума, что приводит к увеличению случаев заболевание людей. Большое количество публикаций [1-3], посвященных этой теме, в последнее время показывает, что окончательно данный вопрос не решен. В статье предложена математическая модель для нахождения временной зависимости звукового давления при равномерном движении источника звука. Полученные результаты должны учитываться при проектировании шумозащитных экранов
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