L. Bartoszek
A5039199200- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Astrophysics and Cosmic Phenomena
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Quantum, superfluid, helium dynamics
- Particle Accelerators and Free-Electron Lasers
- Nuclear Physics and Applications
- Muon and positron interactions and applications
- Space Satellite Systems and Control
- Silicone and Siloxane Chemistry
- Nuclear reactor physics and engineering
- Advanced Data Storage Technologies
- Physics of Superconductivity and Magnetism
- Quantum Chromodynamics and Particle Interactions
- Nuclear physics research studies
- Elevator Systems and Control
- Adaptive optics and wavefront sensing
- Twentieth Century Scientific Developments
- Gyrotron and Vacuum Electronics Research
University of Colorado Boulder
2023
Stanford University
2007-2022
Columbia University
2020
Los Alamos National Laboratory
2013
Fermi National Accelerator Laboratory
1985-2012
Colorado State University
2011
Thomas Jefferson National Accelerator Facility
1997
We describe the design, construction, and performance of Sloan Digital Sky Survey Telescope located at Apache Point Observatory. The telescope is a modified two-corrector Ritchey-Chretien design which has 2.5-m, f/2.25 primary, 1.08-m secondary, Gascoigne astigmatism corrector, one pair interchangeable highly aspheric correctors near focal plane, for imaging other spectroscopy. final ratio f/5. instrumented by wide-area, multiband CCD camera fiber-fed double spectrographs. Novel features...
The T2K experiment is a long baseline neutrino oscillation experiment. Its main goal to measure the last unknown lepton sector mixing angle θ13 by observing νe appearance in νμ beam. It also aims make precision measurement of known parameters, Δm232 and sin22θ23, via disappearance studies. Other goals include various cross-section measurements sterile searches. uses an intense proton beam generated J-PARC accelerator Tokai, Japan, composed beamline, near detector complex (ND280), far...
The SPARC Toroidal Field Model Coil (TFMC) Program was a three-year effort between 2018 and 2021 that developed novel Rare Earth Barium Copper Oxide (REBCO) superconductor technologies then successfully utilized these to design, build, test first-in-class, high-field (∼20 T), representative-scale (∼3 m) superconducting toroidal field (TF) coil. program executed jointly by the MIT Plasma Science Fusion Center (PSFC) Commonwealth Systems (CFS) as technology enabler of pathway fusion energy,...
The SPARC Toroidal Field Model Coil (TFMC) is the first large-scale (∼3 m), high-field (∼20 T) superconducting fusion magnet based on Rare Earth Yttrium Barium Copper Oxide (REBCO). Its objective was to retire risk for toroidal field in tokamak, a burning plasma class magnetic confinement energy device. Weighing 10,058 kg and utilizing 270 km of REBCO, TFMC non-insulated, stack-in-plate style magnet. It has three main components: (1) winding pack; (2) structural case; (3) case extensions, or...
We report the observation of two-neutrino double-beta decay in Xe-136 with T_1/2 = 2.11 +- 0.04 (stat.) 0.21 (sys.) x 10^21 yr. This second order process, predicted by Standard Model, has been observed for several nuclei but not Xe-136. The rate provides new input to matrix element calculations and search more interesting neutrino-less decay, most sensitive probe existence Majorana particles measurement neutrino mass scale.
EXO-200 is an experiment designed to search for double beta decay of $^{136}$Xe with a single-phase, liquid xenon detector. It uses active mass 110 kg enriched 80.6% in the isotope 136 ultra-low background time projection chamber capable simultaneous detection ionization and scintillation. This paper describes detector particular attention most innovative aspects design that revolve around reduction backgrounds, efficient use expensive isotopically xenon, optimization energy resolution...
A new superconducting magnet test facility was created at the MIT Plasma Science and Fusion Center (PSFC) for SPARC Toroidal Field Model Coil (TFMC) program. The designed constructed in parallel with TFMC between 2019 2021, capabilities design approaches tailored to needs of this project its timeline. major components include a cryostat (outer dimensions, 5.3 m×3.7 m×1.5 m) open bore; novel cooling system circulating supercritical helium closed-loop provide ∼600 W power ∼20 bar-a, K; 50 kA,...
This paper introduces a novel, high-intensity source of electron antineutrinos from the production and subsequent decay 8Li. When paired with an existing ~1 kton scintillator-based detector, this <E_\nu>=6.4 MeV opens wide range possible searches for beyond standard model physics via studies inverse beta interaction. In particular, experimental design described here has unprecedented sensitivity to antineutrino disappearance at $\Delta m^2\sim$ 1 eV$^2$ features ability distinguish between...
The preponderance of matter over antimatter in the early Universe, dynamics supernova bursts that produced heavy elements necessary for life and whether protons eventually decay --- these mysteries at forefront particle physics astrophysics are key to understanding evolution our its current state eventual fate. Long-Baseline Neutrino Experiment (LBNE) represents an extensively developed plan a world-class experiment dedicated addressing questions. LBNE is conceived around three central...
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with major improvement in sensitivity compared to the existing limit search for neutron Electric Dipole Moment (EDM). This uses superfluid 4He produce high density of Ultra-Cold Neutrons (UCN) which are contained suitably coated pair measurement cells. The be operated at Spallation Neutron Source Oak Ridge National Laboratory, polarized 3He from an Atomic Beam injected into and transported cells where it serves as...
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well those reached directly at high energy colliders. Discrimination between different models, however, requires complementary searches in atomic-molecular-and-optical, nuclear and particle physics. In this report, we discuss current status prospects near future a compelling suite such experiments, along with developments needed encompassing theoretical framework.
EOS is a technology demonstrator, designed to explore the capabilities of hybrid event detection technology, leveraging both Cherenkov and scintillation light simultaneously. With fiducial mass four tons, operate in high-precision regime, with sufficient size utilize time-of-flight information for full reconstruction, flexibility demonstrate range cutting edge technologies, simplicity design facilitate potential future deployment at alternative sites. Results from can inform neutrino...
This conceptual design report describes the technical facility for IsoDAR electron-antineutrino source at KamLAND. The will allow an impressive program of neutrino oscillation and electroweak physics to be performed provides information on case, subsystems, alternative designs considered, specifics installation KamLAND, identified needs future development. We discuss risks we have our approach mitigating those with this design. A substantial portion is based three years experimental efforts...
From June 2019 to July 2021, the MIT Plasma Science and Fusion Center in collaboration with Commonwealth Fusions Systems (CFS) designed, built, commissioned a test facility at evaluate performance of REBCO-based, 2.9-m tall, 1.9-m wide Toroidal Field Model Coil (TFMC) for SPARC tokamak. This paper presents facility's supercritical helium (SHe) circulation system design measured performance. The employed forced-flow SHe-circulation loop cooled by cryocoolers provide nominal cooling power 600...
Abstract The SuperFGD detector will be a novel and important upgrade to the ND280 near for both T2K Hyper-Kamiokande projects. main goal of is reduce systematic uncertainties associated with neutrino flux cross-section modeling future studies oscillations using experiments. upgraded able perform full exclusive reconstruction final state from neutrino-nucleus interactions, including measurements low momentum protons, pions first time, event-by event neutron kinematics. Precisely understanding...
This whitepaper reviews design options for the IsoDAR electron antineutrino source. is designed to produce $2.6 \times 10^{22}$ antineutrinos per year with an average energy of 6.4 MeV, using isotope decay-at-rest. Aspects which must be balanced cost-effectiveness include: overall cost; rate and distribution flux backgrounds; low technical risk; compactness; simplicity underground construction operation; reliability; value future neutrino physics programs; industry. We show that baseline...
This whitepaper describes the status of DAEdALUS program for development high power cyclotrons as time final meeting Division Particles and Fields 2013 Community Study ("Snowmass"). We report several new results, including a measurement capability between 4 12 degrees on CP violating parameter in neutrino sector. Past IsoDAR Dm^2 antielectron disappearance search, are reviewed. A discussion R&D successes, construction beamline teststand, future plans provided. text incorporates short...
Abstract IsoDAR@Yemilab is a novel isotope-decay-at-rest experiment that has preliminary approval to run at the Yemi underground laboratory (Yemilab) in Jeongseon-gun, South Korea. Here, we describe detail considerations for installing this compact particle accelerator and neutrino target system Yemilab facility. Specifically, caverns being prepared IsoDAR, address installation, shielding, utilities requirements. To give context completeness, also briefly physics opportunities of IsoDAR...
A magnetically driven piston pump for xenon gas recirculation is presented. The designed to satisfy extreme purity and containment requirements, as appropriate the of isotopically enriched through purification system large liquid TPC EXO-200. pump, using sprung polymer gaskets, capable pumping more than 16 standard liters per minute (SLPM) with 750 torr differential pressure.