A High-efficiency Cosmic Ray Veto Detector for the Mu2e Experiment (Poster A)

2019 ◽  
Author(s):  
Ben Barton ◽  
Daniel Mills ◽  
Craig Group
Keyword(s):  
High Efficiency ◽  
Cosmic Ray ◽  
Veto Detector

scholarly journals Gamma-ray astrophysics in the MeV range

2021 ◽  
Author(s):  
Alessandro De Angelis ◽  
Vincent Tatischeff ◽  
Andrea Argan ◽  
Søren Brandt ◽  
Andrea Bulgarelli ◽  
...  
Keyword(s):  
High Efficiency ◽  
Gamma Ray ◽  
Earth Science ◽  
Technological Development ◽  
Cosmic Ray ◽  
Space Mission ◽  
Compact Objects ◽  
Medium Size ◽  
Cosmic Ray Interactions ◽  
Silicon Microstrip Detectors

AbstractThe energy range between about 100 keV and 1 GeV is of interest for a vast class of astrophysical topics. In particular, (1) it is the missing ingredient for understanding extreme processes in the multi-messenger era; (2) it allows localizing cosmic-ray interactions with background material and radiation in the Universe, and spotting the reprocessing of these particles; (3) last but not least, gamma-ray emission lines trace the formation of elements in the Galaxy and beyond. In addition, studying the still largely unexplored MeV domain of astronomy would provide for a rich observatory science, including the study of compact objects, solar- and Earth-science, as well as fundamental physics. The technological development of silicon microstrip detectors makes it possible now to detect MeV photons in space with high efficiency and low background. During the last decade, a concept of detector (“ASTROGAM”) has been proposed to fulfil these goals, based on a silicon hodoscope, a 3D position-sensitive calorimeter, and an anticoincidence detector. In this paper we stress the importance of a medium size (M-class) space mission, dubbed “ASTROMEV”, to fulfil these objectives.

ON POSSIBILITY OF SHORT‐TERM PROGNOSIS OF CYCLONIC ACTIVITY AFTER‐EFFECTS IN VILNIUS BY VARIATION OF HARD COSMIC RAY FLUX/CIKLONŲ AKTYVUMO PASEKMIŲ TRUMPALAIKĖS PROGNOZĖS GALIMYBĖS VILNIAUS MIESTE PAGAL KIETOSIOS KOSMINĖS SPINDULIUOTĖS SRAUTO VARIACIJAS/ О ВОЗМОЖНОСТИ КРАТКОВРЕМЕННОГО ПРОГНОЗА ПОСЛЕДСТВИЙ ЦИКЛОНИЧЕСКОЙ АКТИВНОСТИ В ВИЛЬНЮСЕ ПО КОЛЕБАНИЯМ ПОТОКА ЖЕСТКОГО ИЗЛУЧЕНИЯ

2008 ◽  
Vol 16 (4) ◽  
pp. 159-167 ◽  
Author(s):  
Dmitrijus Styra ◽  
Algirdas Čiučelis ◽  
Ana Usovaitė ◽  
Jovita Damauskaitė
Keyword(s):  
Atmospheric Pressure ◽  
High Efficiency ◽  
Cosmic Ray ◽  
Energy Interval ◽  
Time Interval ◽  
Time Intervals ◽  
After Effects ◽  
Minimum Pressure ◽  
Hard Cosmic Ray Flux ◽  
Cosmic Ray Flux

Analysis of hard cosmic ray flux (HCRF) variation at an energy interval 1.2—1.6 MeV was carried out in Vilnius. Connection between HCRF decrease at the mentioned energy interval and the minimum atmospheric pressure in 3–6 days is defined. This phenomenon is registered from 8 up to 13 hours. According to the time interval of HCRF decrease, for instance 8–9 and 9–10 hours, the minimum pressure in Vilnius takes place in 3^1 days, and at time intervals 11–12, and 12–13 hours ‐ in 5–6 days. Realization of this prognosis at one of the presented time intervals was 56–67% in 2002–2003. The same investigation results, with the assumption of atmospheric pressure decrease from 1005 hPa and less, showed a high efficiency of prognosis of the minimum pressure in Vilnius at all the time intervals during 6 days ‐ 92%, and 82% in 2002 and 2003, correspondingly. Santrauka Atlikta kietosios kosminės spinduliuotės srauto variacijų analizė energijų intervale 1,2–1,6 MeV Vilniaus mieste. Nustatytas ryšis tarp kietosios kosminės spinduliuotės srauto (KKSS) sumažėjimo šiame intervale ir atmosferos slėgio kitimo, kuris įvyks per 3–4 paras. Toks ryšis registruojamas tik nuo 8 val. iki 13 val. KKSS mažėjimas Vilniaus mieste priklauso nuo laiko intervalo, pvz., nuo 8–9 ir 9–10 val. slėgis sumažėja po 3–4 dienų; 11–12 ir 12–13 val. slėgis sumažėja po 5–6 dienų. Prognozės efektyvumas viename iš laiko intervalų buvo nuo 56–67 % 2002–2003 m. atitinkamai. To paties tyrimo rezultatai, įskaitant ir atmosferos slėgio mažėjimą nuo 1005 hPa ir mažiau, parodė aukštą prognozės efektyvumą visuose laiko intervaluose per 6 dienas – 92 % ir 82 % 2002–2003 metais atitinkamai. Резюме Проведен анализ колебаний потока жесткого космического излучения (ПЖКИ) в энергетическом интервале 1,2– 1,6 МэВ в г. Вильнюсе. Установлена связь между падением ПЖКИ в этом энергетическом интервале и изменением атмосферного давления, которое произойдет через 3–6 суток. Такая связь регистрируется только с 8 час. до 13 часов. В зависимости от интервала времени регистрации падения ПЖКИ, в частности, 8–9 часов, 9–10 часов – наименьшее давление в г. Вильнюсе образуется через 3–4 суток, а 11–12 часов и 12–13 часов – через 5–6 суток. Выполнимость такого прогноза по падению ПЖКИ в одном временном интервале в среднем соответствовала 56– 67% в 2002–2003 гг. Результаты аналогичного исследования с учетом того, что атмосферное давление уменьшается, начиная с 1005 гПа и ниже, показали высокую эффективность прогноза формирования наименьшего давления в г. Вильнюсе по падению ПЖКИ во всех временных интервалах в течение 6 суток – 92% и 82% в 2002 и 2003 гг. соответственно.

scholarly journals Muons as a tool for background rejection in imaging atmospheric Cherenkov telescope arrays

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
L. Olivera-Nieto ◽  
A. M. W. Mitchell ◽  
K. Bernlöhr ◽  
J. A. Hinton
Keyword(s):  
Gamma Rays ◽  
High Efficiency ◽  
Computing Time ◽  
Cosmic Ray ◽  
Ground Level ◽  
Cherenkov Light ◽  
High Background ◽  
Cherenkov Telescope ◽  
Background Rejection ◽  
Telescope Arrays

AbstractThe presence of muons in air-showers initiated by cosmic ray protons and nuclei is well established as a powerful tool to separate such showers from those initiated by gamma rays. However, so far this approach has been fully exploited only for ground level particle detecting arrays. We explore the feasibility of using Cherenkov light from muons as a background rejection tool for imaging atmospheric Cherenkov telescope arrays at the highest energies. We adopt an analytical model of the Cherenkov light from individual muons to allow rapid simulation of a large number of showers in a hybrid mode. This allows us to explore the very high background rejection power regime at acceptable cost in terms of computing time. We show that for very large ($$\gtrsim 20$$ ≳ 20  m mirror diameter) telescopes, efficient identification of muon light can potentially lead to background rejection levels up to 10$$^{-5}$$ - 5 whilst retaining high efficiency for gamma rays. While many challenges remain in the effective exploitation of the muon Cherenkov light in the data analysis for imaging Cherenkov telescope arrays, our study indicates that for arrays containing at least one large telescope, this is a very worthwhile endeavor.

scholarly journals ON CONNECTION OF VARIATIONS BETWEEN HARD COSMIC RAY FLUX, TEMPERATURE AND CARDIOVASCULAR DISEASES IN VILNIUS AND SUNSPOT NUMBER DURING 2001–2012

2015 ◽  
Vol 23 (2) ◽  
pp. 113-120
Author(s):  
Dmitrijus STYRO ◽  
Ana USOVAITE
Keyword(s):  
Cardiovascular Diseases ◽  
Correlation Coefficient ◽  
Sunspot Number ◽  
Air Temperature ◽  
High Efficiency ◽  
Cosmic Ray ◽  
Annual Data ◽  
Short Term ◽  
Hard Cosmic Ray Flux ◽  
Cosmic Ray Flux

The connection has been found between the course of cardiovascular diseases (CVD) and the hard cosmic ray flux (HCRF) near the ground surface in Vilnius. The course of air temperature and number of sunspot was simultaneously considered. The investigation was carried out for the average annual and average monthly values in the period of solar cycle 2001–2012. The course of average annual data is most identical for HCRF and number of sunspot: whereas, it significantly differs from CVD and temperature course. The stable connection between a course of average monthly values of HCRF and CVD is found. Such a connection for temperature and CVD had a negative correlation with coefficient of correlation –0.9. A rather weak correlation was between the change in the number of sunspots another characteristics. Values of correlation coefficient between them were less than 0.4 during all of the solar cycle2001–2012. The exception had taken place at the maximum solar activity, i. e. in 2001 and 2012 when values of correlation coefficient exceeded 0.5. For the short-term prognosis of CVD leaps exceeding average monthly value by 10%in 1–3 days after HCRF decrease according to the proposed criterion, the high efficiency of the results 68–79% was obtained. The variation of sunspot number isn’t connected with these data. A short-term connection between the change in air temperature, the change in the sunspot number and CVD leaps has not been found. The human factor has an additional influence on CVD leaps, which was considered in these studies.

scholarly journals Performance of wavelength-shifting fibers for the Mu2e cosmic ray veto detector

2018 ◽  
Vol 13 (12) ◽  
pp. P12028-P12028
Author(s):  
E.C. Dukes ◽  
P.J. Farris ◽  
R.C. Group ◽  
T. Lam ◽  
Y. Oksuzian ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Veto Detector ◽  
Wavelength Shifting Fibers

scholarly journals A High Efficiency Cosmic Ray Veto for the Mu2e Experiment

2017 ◽  
Author(s):  
E. Dukes ◽  
Ralf Ehrlich ◽  
Keyword(s):  
High Efficiency ◽  
Cosmic Ray
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