A5014974108- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Magnetic confinement fusion research
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
- International Science and Diplomacy
- Distributed and Parallel Computing Systems
- Engineering Diagnostics and Reliability
- Spacecraft and Cryogenic Technologies
- Muon and positron interactions and applications
- Unemployment and Economic Growth
- Industrial Engineering and Technologies
- Nuclear Physics and Applications
Fermi National Accelerator Laboratory
2015-2024
Fermi Research Alliance
2002-2022
High Energy Accelerator Research Organization
1998-2021
Old Dominion University
2020
Prof. Assen Zlatarov University
2018-2020
University of California, Los Angeles
2005-2017
National and Kapodistrian University of Athens
2011-2017
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2014
European Organization for Nuclear Research
2014
University of Florida
1997-2013
Rotating coil probes are essential for measuring harmonic multipole fields of accelerator magnets. A fundamental requirement these is their accuracy, which typically implies that the need to be very stiff and straight, have highly accurate knowledge placement windings, an ability buck well in order suppress effects vibrations. Ideally, R&D test environment, probe fabrication should also easy low-cost, so parameters (type, length, number turns, radius, etc.) can customized magnet requiring...
Fermilab is developing and investigating different high-field magnets (HFM) for present future accelerators. The HFM R&D program focused on the 10-12 T based Nb/sub 3/Sn superconductor explored both basic magnet technologies brittle superconductors-wind-and-react react-and-wind. Magnet design studies in support of LHC upgrades VLHC were conducted. A series 1-m long cos-theta dipole models wind-and-react technique was fabricated tested. Three flat racetracks common coil model, a single-layer...
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...
The U.S. LHC Accelerator Research Program (LARP) and CERN combined their efforts in developing Nb3Sn magnets for the high-luminosity upgrade. ultimate goal of this collaboration is to fabricate large aperture Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn quadrupoles interaction regions. These will replace present 70-mm-aperture NbTi quadrupole triplets expected increase peak luminosity up 5 × 10 <sup...
The development of Nb3Sn quadrupole magnets for the High-Luminosity LHC upgrade is a joint venture between US Accelerator Research Program (LARP) <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">*</sup> and CERN with goal fabricating large aperture quadrupoles interaction regions (IR). inner triplet (low-β) NbTi in IR will be replaced by stronger boosting program having 10-fold increase integrated luminosity after foreseen upgrades. Previously,...
The United States has a rich history in high energy particle accelerators and colliders -- both lepton hadron machines, which have enabled several major discoveries elementary physics. To ensure continued progress the field, U.S. leadership as key partner building next generation collider facilities abroad is essential; also critically important exploring of options to host future "Snowmass" study subsequent Particle Physics Project Prioritization Panel (P5) process provide timely...
The high-luminosity Large Hadron Collider (HL-LHC) project aims at allowing to increase the collisions in LHC by a factor of ten decade 2025-2035. One essential element is superconducting magnet around interaction region points, where large aperture magnets will be installed allow further reduce beam size point. core this upgrade Nb3Sn triplet, made up 150-mm quadrupoles range 7-8 m. being shared between European Organization for Nuclear Research and US Accelerator Upgrade Program, based on...
The US Magnet Development Program brings together teams from the leading accelerator magnet research programs to develop next generation of technology for future collider applications. Sponsored by DOE Office High Energy Physics, program strives maintain and strengthen Leadership in field, while nurturing cross-cutting activities other further its impact Science. MDP was initiated 2016, there has been significant progress on original roadmaps major advancements science. These advances, with...
The US Department of Energy (DOE) Office Science (SC), is funding a large bore "Cable Test Facility Magnet" for testing advanced cables and inserts in high transverse field. This joint effort between the High Physics (HEP) Fusion Sciences (FES). background field magnet this facility being developed at Lawrence Berkeley National Laboratory (LBNL) while cryostat test will be located operated by Fermi Accelerator (FNAL). Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The SuperKEKB was designed and constructed as the upgraded accelerator of KEKB. In this design, nano-beam scheme collision applied a luminosity 8 × 1035 cm−2s−1 targeted. beam final focus system key component in hardware elements. This consists 55 superconducting magnets. paper, designs magnets, cryostats cryogenic are shown, field measurement results reported. operation with started on 2018 March 19, magnet quench events up to 2020 December 16 described.
Fermi National Accelerator Laboratory (FNAL) and Lawrence Berkeley (LBNL) are building a new High Field Vertical Magnet Test Facility (HFVMTF) for testing superconducting cables in high magnetic field. The background field of 15 T the HFVMTF will be produced by magnet provided LBNL. is jointly funded US DOE Offices Science, Energy Physics (HEP), Fusion Sciences (FES), serve as cable test facility fields wide range temperatures HEP FES communities. This also used to high-field models...
In order to study dynamic effects in accelerator magnets, such as the decay of magnetic field during dwell at injection and rapid so-called "snapback" first few seconds resumption energy ramp, a fast continuous harmonics measurement system was required. A new system, based on use digital signal processors (DSP) Analog Digital (A/D) converters, developed prototyped Fermilab. This uses Pentek 6102 16 bit A/D converters 4288 DSP board with SHARC ADSP-2106 family processor. It designed acquire...
This article discusses the motion of particles in multiple time dimensions and space dimensions. Transformations are presented for transfer from one inertial frame reference to another case multidimensional time. The implications indicated existence a large number on physical laws like Lorentz covariance, CPT symmetry, principle invariance speed light, law addition velocities, energy-momentum conservation law, etc. Doppler effect is obtained Relations derived between energy, mass, momentum...
The U.S. LHC Accelerator Research Program has been developing Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn quadrupole magnets of progressively increasing performance and complexity for the High-Luminosity project. are wound with Rutherford cables following wind-and-react process. resulting inter-strand coupling can generate strong field distortions during current ramp. latest series 120 mm aperture (HQ) designed built high...
The upgrade of the Large Hadron Collider (LHC) collimation system foresees additional collimators in LHC dispersion suppressor areas. longitudinal space for could be provided by replacing some NbTi main dipoles with shorter 11 T Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn dipoles. To demonstrate this possibility, Fermilab and CERN have started a joint program to develop dipole prototype suitable installation LHC. first step is...
We have searched for direct production of scalar top quarks at the Collider Detector Fermilab in 88 pb-1 p anti-p collisions s**(1/2) = 1.8 TeV. assume quark decays into either a bottom and chargino or quark, lepton, neutrino. The event signature both decay scenarios is missing transverse energy, least two b-quark jets. For mass 90 GeV/c2 neutrino masses 40 GeV/c2, we find no evidence present upper limits on cross section scenarios.
A new superconducting quadrupole magnet for linear accelerators was fabricated at Fermilab. The is designed to work inside a cryomodule in the space between SCRF cavities. cavities must be installed very clean room adding issues design, and fabrication. has splittable along vertical plane configuration could outside of around beam pipe previously connected neighboring For more convenient assembly replacement "superferric" with four racetrack type coils chosen. does not have helium vessel...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The test of the first LARP (LHC Accelerator Research Program) Long Quadrupole is a significant milestone toward development <formula formulatype="inline"> <tex Notation="TeX">${\rm Nb}_{3}{\rm Sn}$</tex></formula> quadrupoles for LHC (Large Hadron Collider) Luminosity Upgrades. </para>
Persistent magnetization currents are induced in superconducting filaments during the current ramping magnets. The resulting perturbation to design magnetic field leads quality degradation, particularly at low field, where effect is stronger relative main field. effects observed NbTi accelerator magnets were reproduced well with critical-state model. However, this approach becomes less accurate for calculation of persistent-current Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The planned upgrade of the LHC collimation system includes additional collimators in lattice. longitudinal space for could be obtained by replacing some main dipoles with shorter but stronger compatible lattice and systems. A joint development program goal building a 5.5 m long two-in-one aperture Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn dipole prototype suitable installation is being conducted FNAL CERN magnet groups. As...
Fermilab, in collaboration with LBNL and BNL, is developing a quadrupole for installation the interaction region inner triplets of LHC. This magnet required to have an operating gradient 215 T/m across 70 mm coil bore, operates superfluid helium at 1.9 K. A 2 m program addressing mechanical, magnetic, quench protection, thermal issues associated design was completed earlier this year, production first full length, cryostatted prototype underway. paper summarizes conclusions program, status...