A5067541571- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Neutrino Physics Research
- Gyrotron and Vacuum Electronics Research
- Plasma Diagnostics and Applications
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- Electrostatic Discharge in Electronics
- Advanced Antenna and Metasurface Technologies
- Pulsed Power Technology Applications
- Magnetic confinement fusion research
- Astrophysics and Cosmic Phenomena
- Microwave Engineering and Waveguides
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Radiation Effects in Electronics
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Electromagnetic Compatibility and Noise Suppression
- Advanced Measurement and Detection Methods
- Electromagnetic Compatibility and Measurements
- Electromagnetic Launch and Propulsion Technology
Euclid Techlabs (United States)
2020-2024
Illinois Institute of Technology
2012-2024
IIT Research Institute
2012-2023
Fermi National Accelerator Laboratory
2019-2020
Northern Illinois University
2018-2020
TechLab (United States)
2020
Uppsala University
2018
Brookhaven National Laboratory
2015-2017
Fermi Research Alliance
2017
A novel single-particle technique to measure emittance has been developed and used characterise seventeen different muon beams for the Muon Ionisation Cooling Experiment (MICE). The beams, whose mean momenta vary from 171 281 MeV/c, have emittances of approximately 1.5--2.3 \pi mm-rad horizontally 0.6--1.0 vertically, a horizontal dispersion 90--190 mm momentum spreads about 25 MeV/c. There is reasonable agreement between measured parameters results simulations. are found meet requirements MICE.
A major technological challenge in building a muon cooling channel is operating rf cavities multitesla external magnetic fields. We report the first proof-of-principle experiment of high pressure gas-filled cavity for use with intense ionizing beams and strong power consumption by beam-induced plasma investigated hydrogen deuterium gases pressures between 20 100 atm peak gradients 5 $50\text{ }\text{ }\mathrm{MV}/\mathrm{m}$. The low case agrees well an analytical model based on electron ion...
A muon collider or Higgs factory requires significant reduction of the six dimensional emittance beam prior to acceleration. One method accomplish this involves building a cooling channel using high pressure gas filled radio frequency cavities. The performance such cavity when subjected an intense particle must be investigated before technology can validated. To end, (rf) test cell was built and placed in 400 MeV line from Fermilab linac study plasma evolution its effect on cavity. Hydrogen,...
Processes occurring in a radio-frequency (rf) cavity, filled with high pressure gas and interacting proton beams, have been studied via advanced numerical simulations. Simulations support the experimental program on hydrogen gas-filled rf cavity Mucool Test Area (MTA) at Fermilab, broader research design of muon cooling devices. space, 3D electromagnetic particle-in-cell (EM-PIC) code atomic physics support, was used simulation studies. Plasma dynamics including process neutral ionization by...
Structure wakefield acceleration (SWFA) is one of the most promising AAC schemes in several recent strategic reports, including DOE's 2016 Roadmap, report on Advanced and Novel Accelerators for High Energy Physics Roadmap (ANAR), Accelerator Beam Research Goals Opportunities. SWFA aims to raise gradient beyond limits conventional radiofrequency (RF) accelerator technology, thus RF beam energy efficiency, by reducing breakdowns from confining microwave a short (on order about 10 ns) intense...
The Muon Ionization Cooling Experiment (MICE) collaboration seeks to demonstrate the feasibility of ionization cooling, technique by which it is proposed cool muon beam at a future neutrino factory or collider. emittance measured from an ensemble muons assembled those that pass through experiment. A pure selected using particle-identification system can reject efficiently both pions and electrons. position momentum each are high-precision scintillating-fibre tracker in 4 T solenoidal...
A first electropolished 201-MHz RF cavity for the international Muon Ionization Cooling Experiment (MICE) has been assembled inside a special vacuum vessel and installed at Fermilab’s MuCool Test Area (MTA). The MTA hall have equipped with numerous instrumentation to characterize operation. commissioned run 14 MV/m gradient no external magnetic field; it is also being in presence of fringe field multiTesla superconducting solenoid magnet, condition which modules will be operated MICE cooling...
Ionization cooling is the preferred method for producing bright muon beams. This technique requires operation of normal conducting, radio-frequency (rf) accelerating cavities within multi-tesla fields dc solenoid magnets. Under these conditions, exhibit increased susceptibility to rf breakdown, which can damage channel components and imposes limits on length transmission efficiency. We report, first time, stable high-vacuum, normal-conducting cavity at gradients $50\text{ }\text{...
Abstract The electron lens in the Fermilab Integrable Optics Test Accelerator (IOTA) will enable new research nonlinear integrable optics, space-charge compensation, cooling, and stability of intense beams. This addresses scientific questions on high-brightness beams operational challenges high-power accelerators for nuclear particle physics. We review roles that lenses play this field physical principles behind their applications. design criteria specifications IOTA storage ring are then...
The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling future Muon Collider and/or Neutrino Factory. As part of this research program, feasibility studies various types RF cavities in high magnetic field environment are progress. unique approach, we have tested cavity filled with pressure hydrogen gas 400 MeV proton beam an external (B = 3 T). Quantitative information about number protons passing through essential requirement test. MTA...
Dielectric-loaded accelerating (DLA) structures are being studied as an alternative to conventional disk-loaded copper produce the high gradient. This paper presents design, fabrication and low-power RF measurement of externally-powered X-band DLA structure with a dielectric constant epsilon_r=16.66 loss tangent tan_delta=0.0000343. A matching section for coupling power from circular waveguide consists very compact disk width 2.035 mm tilt angle 60 degree, resulting in broadband at low field...
Short-pulse two-beam acceleration (TBA) is a promising advanced accelerator concept that may meet the luminosity and cost requirements of future large-scale linear colliders. Accelerating structures with high group velocity (on order 0.1c) are required in this scheme to reduce filling time so as efficiently accelerate main beam multiple bunches. In conventional accelerating such metallic disk-loaded dielectric-loaded, usually implies low shunt impedance, which limits rf-to-main-beam...
An intense beam of muons is needed to provide a luminosity on the order 1034 cm−2s−1 for multi-TeV collider. Because produced by colliding multi-MW proton with target made carbon or mercury have large phase space, significant six dimensional cooling required. Through ionization cooling—the only method that works within lifetime muon—and emittance exchange, desired emittances Higgs Factory higher energy collider are attainable. A channel utilizing gas filled radio frequency cavities has been...
Muon beam-induced plasma loading of radio-frequency (RF) cavities filled with high pressure hydrogen gas 1% dry air dopant has been studied via numerical simulations. The electromagnetic code SPACE, that resolves relevant atomic physics processes, including ionization by the muon beam, electron attachment to molecules, and electron-ion ion-ion recombination, used. Simulations studies have performed in range parameters typical for practical cooling channels.
Understanding of the interaction muon beams with plasma in cooling devices is important for optimization process. We have developed numerical algorithms and parallel software self-consistent simulation production its particle external fields. Simulations support experimental program on hydrogen gas filled RF cavities Mucool Test Area (MTA) at Fermilab. Computational are based electromagnetic particle-in-cell (PIC) code SPACE combined a probabilistic, macroparticle-based implementation atomic...
Envisioned muon ionization cooling channel is based on vaccum and/or gas-filled RF cavities of frequencies 325 and 650 MHz. In particular, to meet the luminosity requirement for a collider, beam intensity should be order 10 12 muons per bunch. this high intensity, transient loading can significantly reduce accelerating gradients deteriorate quality. We estimate effect using an equivalent circuit model. For cavity case, compared with plasma loading. also investigate excitation higher-order...