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Search Results: 1 - 10 of 296004 matches for " G. V. Kane "
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Multiphysics Analysis for Thermal Management of a 3 MeV, 325 MHz Radio Frequency Quadrupole Accelerator for Indian Spallation Neutron Source  [PDF]
N. K. Sharma, C. P. Paul, S. C. Joshi, G. V. Kane, A. Chaturvedi
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2019, DOI: 10.4236/jemaa.2019.115005
Abstract: We present multiphysics design studies for thermal management of a 325 MHz 3 MeV Radio Frequency Quadrupole (RFQ) structure for the front end of 1 GeV proton linac for proposed Indian Spallation Neutron Source (ISNS). Physics design of RFQ for ISNS application has been carried out for 10% (maximum) duty factor. During high power operation of RFQ, RF-induced heating would result in temperature rise, thermal deformations and frequency shift of RFQ from designed values. Therefore thermal management is one of the important design considerations for RFQ development. During design studies, electromagnetic analysis of RFQ cavity is performed to compute RF induced heat fluxes on RFQ surfaces using SUPERFISH and ANSYS software. Simulated results for both codes were compared and found in well agreement. A water cooling scheme has been designed to absorb RF induced heat from RFQ structure. Cooling parameters are optimized by employing univariate search method optimization technique. An RF-Thermal-Structural-RF coupled multi-physics analysis methodology is developed to evaluate thermal induced frequency detuning of ISNS RFQ structure. Parametric studies are carried out to investigate the effect of cooling water temperatures on RFQ frequency. Based on analysis results, cooling water temperatures are varied to restore RFQ frequency to designed values. Thus, water cooling will not only remove heat from structure, but it will also be used for online control of resonating frequency during steady state operation of RFQ structure. Results of numerical studies carried out for thermal management of ISNS RFQ are presented in this paper.
Guarded recession surgical procedure in horizontal concomitant squint surgery
Sathe S,Kane V
Indian Journal of Ophthalmology , 1983,
Abstract:
Is the World Supersymmetric? Do We Already Know?
G. L. Kane
Physics , 1993,
Abstract: In addition to the very good theoretical motivations for supersymmetry, there are now at least nine phenomenological indications that nature is supersymmetric. All are indirect, so more is better. They are enumerated here. Some discussion is also given of models, of when and where superpartners might be directly detected, and of why the scale of supersymmetry cannot be pushed up if superpartners and SUSY Higgs bosons are not directly detected.
Connecting String Theory and Phenomenology
G. L. Kane
Physics , 2002,
Abstract: To make progress in learning the underlying fundamental theory, it will be necessary to combine bottom-up phenomenology and top-down analysis -- in particular, top-down is unlikely to succeed alone. Here I elaborate on the role of both, and describe obstacles that need to be overcome to help data point toward the underlying theory, as well as approaches that might help to bypass full systematic treatments. I also summarize arguments that superpartners are probably being produced at the Tevatron Collider.
Searching for a Light Stop at the Tevatron
Gregory Mahlon,G. L. Kane
Physics , 1996, DOI: 10.1103/PhysRevD.55.2779
Abstract: We describe a method to help the search for a light stop squark [M(stop) + M(LSP) < M(top)] at the Fermilab Tevatron. Traditional search methods rely upon a series of stringent background-reducing cuts which, unfortunately, leave very few signal events given the present data set. To avoid this difficulty, we instead suggest using a milder set of cuts, combined with a "superweight," whose purpose is to discriminate between signal and background events. The superweight consists of a sum of terms, each of which are either zero or one. The terms are assigned event-by-event depending upon the values of various observables. We suggest a method for choosing the observables as well as the criteria used to assign the values such that the superweight is "large" for the supersymmetric signal and "small" for the standard model background. For illustration, we mainly consider the detection of stops coming from top decay, making our analysis especially relevant to the W+2 jets top sample.
Possible Detection of a Higgs Boson at Higher Luminosity Hadron Colliders
Stephen Mrenna,G. L. Kane
Physics , 1994,
Abstract: We have examined how a Standard Model or Supersymmetric Higgs boson h might be detected at possible hadron colliders. The channels W(to ell nu)h(to b b~), Z(to ell ell~)h(to b b~) and W/Z(to jets)h(to tau+ tau-) are most useful. The results imply that h with mass M_h can be detected or excluded for M_h between about 80--130 GeV at any hadron collider with energy greater or similar to 2 TeV and an integrated luminosity greater or similar to 10 fb^{-1}; high luminosity is the essential requirement. We comment on measuring $h$ couplings and branching ratios.
Do About Half the Top Quarks at FNAL Come From Gluino Decays?
G. L. Kane,S. Mrenna
Physics , 1996, DOI: 10.1103/PhysRevLett.77.3502
Abstract: We argue that it is possible to make a consistent picture of FNAL data including the production and decay of gluinos and squarks. The additional cross section is several pb, about the size of that for Standard Model (SM) top quark pair production. If the stop squark mass is small enough, about half of the top quarks decay to stop squarks, and the loss of SM top quark pair production rate is compensated by the supersymmetric processes. This behavior is consistent with the reported top quark decay rates in various modes and other aspects of the data, and suggests several other possible decay signatures. This picture can be tested easily with more data, perhaps even with the data in hand, and demonstrates the potential power of a hadron collider to determine supersymmetric parameters. It also has implications for the top mass measurement and the interpretation of the LEP $R_b$ excess.
Measuring the Supersymmetry Lagrangian
Michal Brhlik,G. L. Kane
Physics , 1998, DOI: 10.1016/S0370-2693(98)00919-8
Abstract: The parameters of the supersymmetry Lagrangian are the place where experiment and theory will meet. We show that measuring them is harder than has been thought, particularly because of large unavoidable dependences on phases. Measurements are only guaranteed if a lepton collider with a polarized beam and sufficient energy to produce the relevant sparticles is available. Current limits on superpartner masses, WIMPs, and the supersymmetric Higgs are not general, and need re-evaluation. We also tentatively define the MRM (Minimum Reasonable Model), whose parameters may be measurable at LEP, FNAL and LHC.
Recognizing Superpartners at LEP
G. L. Kane,Gregory Mahlon
Physics , 1997, DOI: 10.1016/S0370-2693(97)00799-5
Abstract: There is a class of supersymmetric models which is well-motivated by hints of evidence for SUSY and consistent with all existing data. It is important to study the predictions of these models. They are characterized by M(N3) > M(C1) > M(snu) > M(N1) (where Ni and Ci are neutralino and chargino mass eigenstates), |mu| ~< M1 ~< M2 ~= M(Z), mu < 0, and tan(beta) near 1. Their LEP signatures are mostly unusual. Most produced superpartners are invisible! A good signature is two photons plus large missing energy. There are also excess events at large recoil mass in the single photon plus nothing channel. We list the main signatures for charginos, stops, etc., which are also likely to be unconventional. This class of models will be definitively tested at LEP194 with 100 pb^{-1} per detector, and almost definitively tested at LEP184.
Introduction to "The Supersymmetric World: The Beginnings of The Theory"
G. L. Kane,M. Shifman
Physics , 2001,
Abstract: This is the foreword to the book we edited on the origins and early development of supersymmetry, which has been just issued by World Scientific. This book presents a view on the discovery of supersymmetry and pioneering investigations before summer 1976, mainly in the words of people who participated. It combines anecdotal descriptions and personal reminiscences with more technical summaries of the trailblazers, covering the birth of the theory and its first years -- origin of the idea, four-dimensional field theory realization, and supergravity. The eyewitnesses convey to us the drama of one of the deepest discoveries in theoretical physics in the 20-th century. Contributors: V. Akulov, R. Di Stefano, P. Fayet, S. Ferrara, G.-L. Gervais, N. Koretz-Golfand, E. Likhtman, M. Marinov, A. Neveu, L. O'Raifeartaigh, P. Ramond, B. Sakita, J. Schwarz, M. Sohnius, V. Soroka, J. Strathdee, D. Volkov, J. Wess, P. West.
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