نتایج جستجو برای: beta beam
تعداد نتایج: 299514 فیلتر نتایج به سال:
In tins article we study the possibility of designing storage rings with a reduced by two or more orders of magnitude with respect to existing rings, thus making the bunch length shorter by a factor of 10 or more . We will, with an appropriate design, show that this bunch length reduction can be achieved while simultaneously increasing the beam peak current. With this approach one can increase ...
In this paper, the possibility to exploit a high energy beta beam without massive detectors is discussed. The radioactive ions are boosted up to very high γ with the neutrino beam pointing towards an instrumented surface located at a moderate baseline (e.g. from CERN to the Gran Sasso Laboratories). νe → νμ oscillations and their CP conjugate are tagged as an excess of horizontal muons produced...
When a laser pulse of intensity 10(19) W cm(-2) interacts with solid targets, electrons of energies of some tens of MeV are produced. In a tantalum target, the electrons generate an intense highly directional gamma-ray beam that can be used to carry out photonuclear reactions. The isotopes 11C, 38K, (62,64)Cu, 63Zn, 106Ag, 140Pr, and 180Ta have been produced by (gamma,n) reactions using the VUL...
The aCORN experiment measures the neutron-decay electron-antineutrino correlation ($a$ coefficient) using a novel method based on an asymmetry in proton time-of-flight for events where beta electron and recoil are detected delayed coincidence. We report data analysis result from second run at NIST Center Neutron Research, high-flux cold neutron beam new NG-C guide end position: $a=\ensuremath{-...
The betatron phase advance between two points in a storage ring can be very accurately determined from a transverse beam transfer function measurement with DC beam. The phase advance can be determined from the difference in the phase response between an upper betatron sideband (N+Q line) and a lower betatron sideband (N-Q line) in an open loop network analyzer measurement between a kicker and a...
The phenomenon of current dependent bunch lengthening discovered at AC0 and ADONE about seven years ago can be used as an engineering diagnostic tool to examine how the longitudinal electromagnetic field of a beam couples to its surroundings. 1 The importance of isolating such coupling factors is that they may give rise to damaging instabilities. Another practical reason for studying the effect...
The present status of neutron beam production techniques above 20 MeV is discussed. Presently, two main methods are used; white beams and quasi-monoenergetic beams. The performances of these two techniques are discussed, as well as the use of such facilities for measurements of nuclear data for fundamental and applied research. Recently, two novel ideas on how to produce extremely intense neutr...
The various technologies available to build a SASE-type undulator for a 1As wavelength are compared. This includes permanent magnets, superconducting and room-temperature electromagnets for both the planar and helical-"eld con"gurations. Following a 3D computation of the magnetic "eld, general expressions are given for the peak "eld as a function of the undulator period. The growth length and s...
The last component of a muon collider facility, as presently envisioned[1], is a colliding-beam storage ring. Design studies on various problems for this ring have been in progress over the past year[2]. In this paper we discuss the current status of the design. The projected muon currents require very low beta values at the IP, β∗ = 3mm, in order to achieve the design luminosity of L = 10 cm−2...
Energy confinement comparable with tokamak quality is achieved in the Madison Symmetric Torus (MST) reversed field pinch (RFP) at a high beta and low toroidal magnetic field. Magnetic fluctuations normally present in the RFP are reduced via parallel current drive in the outer region of the plasma. In response, the electron temperature nearly triples and beta doubles. The confinement time increa...
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