P. Wanderer
A5043364029- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Physics of Superconductivity and Magnetism
- Magnetic confinement fusion research
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Magnetic Properties and Applications
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Spacecraft and Cryogenic Technologies
- Electric Motor Design and Analysis
- Magnetic Field Sensors Techniques
- Superconductivity in MgB2 and Alloys
- Magnetic Properties of Alloys
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Non-Destructive Testing Techniques
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Electromagnetic Launch and Propulsion Technology
- Electron and X-Ray Spectroscopy Techniques
- Advanced NMR Techniques and Applications
Brookhaven College
2009-2024
Brookhaven National Laboratory
2013-2023
RIKEN BNL Research Center
2001-2021
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2017
European Organization for Nuclear Research
2016
Supercon (United States)
2009-2013
University of Alberta
2011
National Centre for Nuclear Research
2011
Institute of Particle Physics
2011
Fermi National Accelerator Laboratory
1975-2009
We have observed fourteen events in which two muons are produced by high-energy neutrino and antineutrino interactions. The absence of trimuon the characteristics dimuon require existence one or more new massive particles that decay through weak interaction. particle mass is estimated to lie between 2 4 GeV.
Using a quadrupole focused neutrino beam, 61 events with two muons in the final state have been observed at Fermilab. These include seven ${\ensuremath{\mu}}^{\ensuremath{-}}{\ensuremath{\mu}}^{\ensuremath{-}}$ events. A comparison of event rate targets different hadron absorption length indicates that attributing to $\ensuremath{\pi}$ or $K$ leptonic decay is ruled out by 4.0 standard deviations. No trimuon were which, combined lepton conservation, an unobserved neutral present most
The High Luminosity LHC (HL-LHC) project aims at accumulating 3000 <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm fb}^{-1}$</tex></formula> in the years 2023–2035, i.e., ten times more w.r.t. nominal performance expected for 2010–2021. One key element to reach this challenging is a new insertion region reduce beam size interaction point by approximately factor two. This requires larger aperture...
The High Luminosity (HiLumi) Large Hadron Collider (LHC) project has, as the main objective, to increase LHC peak luminosity by a factor five and integrated ten. This goal will be achieved mainly with new interaction region layout, which allow stronger focusing of colliding beams. target reduce beam size in points two, requires doubling aperture low- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
Abstract The High Luminosity Large Hadron Collider (HL-LHC) is the new flagship project of CERN. First endorsed in 2013 and approved 2016, HL-LHC an upgrade accelerator aiming to increase by a factor ten statistics LHC collisions at horizon 2035–2040. relies on cutting edge technologies: among them, large aperture superconducting magnets will replace present hardware allow smaller beam size two interaction points (IPs). involves construction about 150 six different types: quadrupole triplet,...
The high-$y$ anomaly in inelastic ${\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$-nucleon scattering is shown to exhibit effective violations of scale invariance and charge-symmetry invariance. cannot be explained by from antiquarks the usual three-quark model.
Neutrino-induced dimuon events probably involve the production and subsequent decay of one or more real, intermediate particles. The observed properties are shown not to agree with hypotheses that particles heavy leptons semiweak vector bosons. This strongly suggests new hadrons as leading explanation events. Such hadrons, decaying weakly, would necessarily possess a new, yet unidentified, quantum number.
In a run with predominantly $\overline{\ensuremath{\nu}}$ beam we have observed seven dimuon events which show clearly that dimuons are produced by as well $\ensuremath{\nu}$. Using the signature of those tentatively identify twelve from earlier runs $\overline{\ensuremath{\nu}}$-induced. The characteristics total sample support explanation arise new hadron production.
Using a sample of 4994 neutrino events and 2408 antineutrino we have measured the ratio to charged-current cross sections up 100 GeV. Neutrino flux-independent flux-dependent measurements were carried out with good agreement between two methods. Below 30 GeV was found be 0.38 \ifmmode\pm\else\textpm\fi{} 0.06. The cross-section shows significant departure from this value above 50
In 2004, the US DOE established LHC Accelerator Research Program (LARP) with goal of developing a technology base for future upgrades LHC. The focus magnet program, which is collaboration three laboratories, BNL, FNAL and LBNL, on development high gradient quadrupoles using <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$ Nb_3 Sn$</tex> superconductor. Other program components address issues regarding design, radiation-hard materials, long...
In this paper, we outline the present status of design studies for high-luminosity Large Hadron Collider, focusing on choice aperture inner triplet quadrupoles. After reviewing some critical aspects such as energy deposition, shielding, heat load, and protection, main tentative parameters building a 150-mm-aperture Nb3Sn quadrupole, based experience gathered by LARP program in past several years.
Among the components to be upgraded in LHC interaction regions for HiLumi-LHC projects are inner triplet (or low-β) quadrupole magnets, denoted as Q1, Q2a, Q2b, and Q3. The new called MQXF, based on Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn superconducting magnet technology operate at a gradient of 132.6 T/m, with conductor peak field 11.4 T. Q1 Q3 composed magnets (called MQXFA) fabricated by U.S. Accelerator Upgrade Project...
This paper presents the design, construction, and test results of a high-energy-density coil for superconducting magnetic energy storage system (SMES). The was designed to reach 25 T at 4 K in 100-mm bore under program funded by ARPA-E. used over 6 km 12-mm-wide second-generation high-temperature superconductors (HTS) provided SuperPower. Such high fields large aperture built with new still-developing conductor magnet technology created several challenges, which included stresses quench...
Measurements of ${R}^{\ensuremath{\nu}}$ and ${R}^{\overline{\ensuremath{\nu}}}$, the ratios neutral current to charged $\ensuremath{\nu}$ $\overline{\ensuremath{\nu}}$ cross sections, yield rates for that are consistent with a pure $V\ensuremath{-}A$ interaction but 3 standard deviations from $V$ or $A$, indicating presence parity nonconservation in weak current.
In support of the Large Hadron Collider luminosity upgrade, a large bore (120 mm) Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn quadrupole with 15 T peak coil field is being developed within framework US LHC Accelerator Research Program (LARP). The 2-layer design mm wide cable aimed at pre-stress control, alignment and quality while exploring magnet performance limits in terms gradient, forces stresses. addition, HQ will...
The result of a measurement $\ensuremath{\sigma}({\ensuremath{\nu}}_{\ensuremath{\mu}}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\nu}}_{\ensuremath{\mu}}+{e}^{\ensuremath{-}})$ is presented. With use neutrinos mean energy 1.5 GeV from the Brookhaven National Laboratory alternating gradient synchrotron and massive, active, high-resolution detector, signal 51\ifmmode\pm\else\textpm\fi{}9 events with an average signal-to-background ratio greater than 2:1 observed....
This paper presents the goal and status of high field High Temperature Superconductor (HTS) solenoid program funded through a series SBIRs. The target this R&D is to build HTS coils that are capable producing fields greater than 20 T when tested alone approaching 40 in background magnet. will be made with second generation (2G) engineering current density tape. To date, 17 pancake have been built temperature range from K 80 K. Quench protection, stresses minimization degradation conductor...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Amongst the magnet development program of a large-aperture <formula formulatype="inline"><tex Notation="TeX">${\rm Nb}_{3}{\rm Sn}$</tex></formula> superconducting quadrupole for Large Hadron Collider luminosity upgrade, six magnets were built and tested using shell based key bladder technology (TQS). The 1 m long 90 mm aperture are part US LHC Accelerator Research Program (LARP) aimed at...
Quadrupoles in the fragment separator region of Facility for Rare Isotope Beams (FRIB) will be subjected to very large heat loads (over 200 Watts) and an intense level radiation (~10 MGy per year) into coils just first magnet. Magnets made with High Temperature Superconductors (HTS) are advantageous over conventional superconducting magnets since they can remove these more efficiently at higher temperatures. The proposed design is based on second generation (2G) HTS which allows operation...
Cooling of beams gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens possibility this technique higher energies than possible electrostatic acceleration beams. The challenges include generation suitable for cooling, delivery required quality to cooling sections without degradation beam angular divergence energy spread,...
In December 2009 during its first cold test, LQS01, the Long <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">${\rm Nb}_{3}{\rm Sn}$</tex></formula> Quadrupole made by LARP (LHC Accelerator Research Program, a collaboration of BNL, FNAL, LBNL and SLAC), reached target field gradient 200 T/m. This was set in 2005 US Department Energy, CERN LARP, as significant milestone toward development quadrupoles...
Future insertion quadrupoles with large apertures and high gradients will be required for the Phase II luminosity upgrade (1035 cm−2s−1) of Large Hadron Collider (LHC). Although improved designs, based on NbTi, are being considered as an intermediate step I upgrade, Nb3Sn conductor is presently best option that meets ultimate performance goals both operating field temperature margin. As part development magnet technology, LHC Accelerator Research Program (LARP) developed tested several...