A5087228704- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Nuclear Physics and Applications
- Spacecraft and Cryogenic Technologies
- Radio Frequency Integrated Circuit Design
- Semiconductor materials and devices
- Refrigeration and Air Conditioning Technologies
- Electric and Hybrid Vehicle Technologies
- Advanced Combustion Engine Technologies
- Quantum, superfluid, helium dynamics
- Advancements in Semiconductor Devices and Circuit Design
- Hydrogen Storage and Materials
- Aerodynamics and Fluid Dynamics Research
- Advanced Fiber Optic Sensors
- Heat Transfer and Optimization
- Heat Transfer and Boiling Studies
Fermi National Accelerator Laboratory
2016-2024
University of Cincinnati
2020-2024
Texas A&M University
2023
Lawrence Berkeley National Laboratory
2023
University of Chicago
2020-2022
University of California, Santa Barbara
2020-2022
Fermi Research Alliance
2021
St. Catherine University
2020
University of Bern
2012-2016
Universität Hamburg
2015
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 Luminosity upgrade of the Large Hadron Collider (HL-LHC) at CERN will include eight cryo-assemblies that are expected to be fabricated and delivered by US HL-LHC Accelerator Upgrade Project (AUP) as part U.S. contributions HL-LHC. These cryostat assemblies quadrupole magnetic components Q1 Q3 inner triplet optical elements in front two interaction points. Each cryo-assembly consists 4.2 m long Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
New high field and large-aperture quadrupole magnets for the low-beta inner triplets (Q1, Q2, Q3) have been built tested as part of high-luminosity upgrade Large Hadron Collider (HL-LHC). These new are based on Nb3Sn superconducting technology. The US Accelerator Upgrade Project (US-AUP) is producing Q1 Q3 Cryo-Assemblies: a pair ∼ 5 m long magnet structures installed in stainless-steel helium vessel (Cold Mass) surrounded by cryostat shields, piping, vacuum vessel. This paper gives an...
Analyses have been performed on floating-gate avalanche-injection MOS transistor (FAMOS) devices which subjected to write/erase cycling, resulting in hole injection into the tunnel dielectric. Theoretical and experimental analysis of these shown that bits exhibit fast erase due trapped holes are highly modulated by field across Two distinct disturb mechanisms, one is heavily impacted evaluated with regards their temperature dependencies empirical models developed for both mechanisms.< <ETX...
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,...
During the development of MQXF, new Nb <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Sn quadrupole to be used in large hadron collider (LHC) inner triplets for High Luminosity upgrade, three short models were tested: MQXFS1, MQXFS3, and MQXFS5. These differ use thin or thick laminations iron components, coil design, superconductive strands, rod restack process (RRP) powder tube (PIT). In MQXF azimuthal prestress is provided at room...
About one hundred magnets of six different types shall be installed in the High Luminosity LHC (HL-LHC) years 2026--2028 at CERN. The design, construction and test are based on CERN collaborations with institutes industrial partners USA, Spain, Italy, Japan China. Three correctors Nb–Ti technology feature conductor peak fields 2 to 4 T range: for all them protoype phase has been successfully completed. production is well advanced superferric correctors, starting canted cos theta nested...
The Liquid Argon Time Projection Chamber (LArTPC) is a prime type of detector for future large-mass neutrino observatories and proton decay searches. In this paper we present the design operation, as well experimental results from ARGONTUBE, LArTPC being operated at AEC-LHEP, University Bern. main goal to prove feasibility charge drift over very long distances in liquid argon. Many other aspects technology are also investigated, such voltage multiplier generate high argon (Greinacher...
With the successful test of first two pre-series magnets US HL-LHC Accelerator Upgrade Project has started production MQXFA to be used in Q1/Q3 inner triplet elements HL-LHC. This good start comes after prototypes with limited performance, and it demonstrates importance learning from past issues. Therefore, this paper we want share most important lessons learned so far, focusing on those which may more interesting for similar projects. We will also present status fabrication US.
For the HiLumi LHC Upgrade (HL-LHC), new high field and large-aperture quadrupole magnets for low-beta inner triplets (Q1, Q2, Q3) are being built. These based on Nb3Sn superconducting technology. As part of US-HiLumi Accelerator Project (AUP), ten Cryostat Assemblies (LQXFA) Q1 Q3 replacement will be built, tested, delivered to CERN. The first LQXFA was assembled tested at Fermi National Laboratory (FNAL) during fall 2022 spring/summer 2023, respectively. This paper summarizes assembly...
A workshop was held at Fermilab November 8-9, 2013 to discuss the challenges of using high voltage in noble liquids. The participants spanned fields neutrino, dark matter, and electric dipole moment physics. All presentations were made plenary sessions. This document summarizes experiences lessons learned from experiments these developing systems
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...
By the end of October 2022, US HL-LHC Accelerator Upgrade Project (AUP) had completed fabrication ten MQXFA magnets and tested eight them. The are low beta quadrupole to be used in Q1 Q3 Inner Triplet elements High Luminosity LHC. This AUP effort is shared by BNL, Fermilab, LBNL, with strand verification tests at NHMFL. An important step QA plan testing a vertical cryostat BNL. acceptance criteria that could BNL were all met first four production (MQXFA03-MQXFA06). Subsequently, two (MQXFA07...
Fermilab is fabricating ten full length cold masses for the high-luminosity Large Hadron Collider Accelerator Upgrade Project (HL-LHC AUP). One practice assembly and one pre-series have been completed. This paper summarizes con-struction details. Topics include incoming inspection, bus assembly, component machining, shell forming, beam tube insertion, expansion loop installation, instrumentation electrical testing, heat exchanger installation final welding. In-process surveys, alignment...
ArDM-1t is the prototype for a next generation WIMP detector measuring both scintillation light and ionization charge from nuclear recoils in 1-ton liquid argon target. The goal to reach minimum recoil energy of 30 keVr detect recoiling nuclei. In this paper we describe experimental concept present results on detection system, tested first time ArDM surface at CERN. With preliminary incomplete set PMTs, yield zero electric field found be between 0.3-0.5 phe/keVee depending position within...
In this paper we present results on measurements of the dielectric strength liquid argon near its boiling point and cathode-anode distances in range 0.1 mm to 40 with spherical cathode plane anode. We show that at such applied electric field which breakdowns occur is as low kV/cm. Flash-overs across ribbed high voltage feed-through are observed for a length 300 starting from 55 kV. These contribute set reference breakdown-free design ionization detectors, Liquid Argon Time Projection...
A workshop was held at Fermilab on March 20-21, 2013 to discuss the development of liquid argon time projection chambers (LArTPC) in United States. The organized under auspices Coordinating Panel for Advanced Detectors, a body that initiated by American Physical Society Division Particles and Fields. All presentations were made plenary sessions into seven topical categories: $i)$ Argon Purity, $ii)$ Cryogenics, $iii)$ TPC High Voltage, $iv)$ Electronics, Data Acquisition Triggering, $v)$...
We report on the design and construction of a LED-based fiber calibration system for large liquid argon time projection detectors. This was developed to calibrate optical systems MicroBooNE experiment. As well as detailing materials installation procedure, we provide technical drawings specifications so that may be easily replicated in future LArTPC
A number of liquid argon time projection chambers (LAr TPCs) are being built or proposed for neutrino experiments on long- and short baseline beams. For these detectors, a distortion in the drift field due to geometrical physics reasons can affect reconstruction events. Depending TPC geometry electric intensity, this could be same magnitude as itself. Recently, we presented method calibrate correct possible distortions. While straight cosmic ray muon tracks used calibration, multiple coulomb...
We present a study on the dependence of electric breakdown discharge properties electrode geometry and field in liquid argon near its boiling point. The measurements were performed with spherical cathode planar anode at distances ranging from 0.1 mm to 10.0 mm. A detailed time evolution volt-ampere characteristics was for first time. It revealed slow streamer development phase discharge. results spectroscopic visible light emission breakdowns complement measurements. initial is attributed...
ARGONTUBE is a liquid argon time projection chamber (LAr TPC) with drift field generated in-situ by Greinacher voltage multiplier circuit. We present results on the measurement of drift-field distribution inside using straight ionization tracks an intense UV laser beam. Our analysis based simplified model charging multi-stage circuit to describe voltages cage rings.