نتایج جستجو برای: beta beam
تعداد نتایج: 299514 فیلتر نتایج به سال:
Neutrinos are the only particles able to reach the earth straight from the center of a core-collapse supernova. But the information that can be gathered from their signal in a terrestrial detector is limited by the fact that little experimental data on neutrino-nucleus interactions exists and by uncertainties in theoretical calculations. Neutrino oscillations are a further complication : the en...
LIQUIDUS WADSLEYITE-RINGWOODITE PAIRS FRACTIONALLY CRYSTALLIZED FROM OLIVINE MELT ENCLAVES IN SHOCK MELT VEINS IN L6 CHONDRITES. A. El Goresy, M. Miyahara, E. Ohtani, T. Nagase, M. Nishijima, T. Ferroir and Ph. Gillet. Bayerisches Geoinstitut, Universität Bayreuth, 95447 Bayreuth, Germany, Email: [email protected], Graduate School of Science, Tohoku University, Sendai, 980-8758, Ja...
We present an update on the lattice design of the electron ring of the Jefferson Lab Electron-Ion Collider (JLEIC). The electron and ion collider rings feature a unique figure-8 layout providing optimal conditions for preservation of beam polarization. The rings include two arcs and two intersecting long straight sections containing a low-beta interaction region (IR) with special optics for det...
We have measured beta functions using single kick closed orbit at KEKB. The measured beta functions were compared with the model lattice and gradient errors were extracted from the result in a beta beat. The gradient errors were also obtained by changing strength of steering magnets and measuring beam positions as the second method. The methods of the error estimation and preliminary results wi...
Here N is the number of particles in the electron and positron bunches (assumed to be equal), f is the bunch repetition frequency and 0~ is the transverse dimension Ef the bunch, assumed fqr and round. We note that the .units,of& sim licity to be gaussian -P are cm set . multiplied by the cross sectionA '"T h Thus the luminosity or t e occurrence of a particular event in the beam-beam collision...
Precise calculation of the geometrical acceptance of a large solid angle detector with an integrated stopping target relies on precise knowledge of the beam geometry. We describe four alternative methods that we used to measure the beam stopping distributions in the PIBETA detector active target: (i) light response of segmented target elements to incident beam particles, (ii) backtracking of ch...
Davide Meloni, Olga Mena, Christopher Orme, Sergio Palomares-Ruiz and Silvia Pascoli 1 Dipartimento di Fisica, Universitá di Roma Tre and INFN, Sez. di Roma Tre, via della Vasca Navale 84, I-00146 Roma, Italy 2 INFN Sez. di Roma, Dipartimento di Fisica, Universitá di Roma ”La Sapienza”, P.le A. Moro, 5, I-00185 Roma, Italy 3 IPPP, Department of Physics, Durham University, Durham DH1 3LE, United...
In order to reach high luminosity, the Future Circular e $$^+$$ $$^-$$ Collider will need very intense beams with small emittances and beta functions in interaction points. This is achieved a large Piwinski angle combined crab waist collision scheme. Under these conditions, luminosity beam–beam tune shifts are strongly influenced by bunch length. On other hand, this machine, beamstrahlung effec...
A process for growing gallium nitride (GaN) vertical p–i–n homojunctions on (111) silicon substrates using metalorganic chemical vapor deposition was developed, and a triple mesa etch technique used to fabricate efficient betavoltaic energy converters. Monte Carlo simulation platform CASINO model beta radiation penetration into GaN aid device design. The resulting devices were tested under irra...
در این رساله اسانس گیاهان ذیل مورد بررسی و آنالیز قرار گرفتند: اسانس اجزاء گیاه leutea petiolare مورد آنالیز واقع گردید. ترکیبات اصلی اسانس گل عبارتنداز: beta-pinene(32.081)،fenchyl acetate (35.776) alpha- pinene(3.06), beta-eudesmol(5/236), از17ترکیب شناسائی شده دراسانس برگ عبارتنداز (6.952) sabinene،d-limonene (11/749)،beta-(e) ociemen (297.8) ، واز 12ترکیب شناسایی شده دراسانس ساقه ...
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