A5100405757- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Electrostatic Discharge in Electronics
- Microwave Engineering and Waveguides
- Advanced Measurement and Detection Methods
- Magnetic confinement fusion research
- Pulsed Power Technology Applications
- Acoustic Wave Resonator Technologies
- Advanced Algorithms and Applications
- Particle physics theoretical and experimental studies
- Induction Heating and Inverter Technology
- Laser-Plasma Interactions and Diagnostics
- Radio Frequency Integrated Circuit Design
- Semiconductor Quantum Structures and Devices
- Plasma Diagnostics and Applications
- Muon and positron interactions and applications
- Astrophysics and Cosmic Phenomena
- Advanced Semiconductor Detectors and Materials
- Laser and Thermal Forming Techniques
- Sensor Technology and Measurement Systems
- Power Transformer Diagnostics and Insulation
- Magnetic Field Sensors Techniques
Thomas Jefferson National Accelerator Facility
2014-2024
Institute of Physics
2023
Nanchang University
2022
North China Electric Power University
2022
Sanjiang University
2019
Cal Poly Corporation
2019
California Polytechnic State University
2019
Old Dominion University
2018
University of Chinese Academy of Sciences
2016
Chinese Academy of Sciences
2016
The status of the research on muon colliders is discussed and plans are outlined for future theoretical experimental studies. Besides continued work parameters a 3-4 0.5 TeV center-of-mass (CoM) energy collider, many studies now concentrating machine near 0.1 that could be factory s-channel production Higgs particles. We discuss various components in such colliders, starting from proton accelerator needed to generate pions heavy-Z target proceeding through phase rotation decay ($\pi \to \mu...
Abstract This paper proposes a novel method of applying an iterative generation differential equation to the multi-component nonlinear signal analysis diesel engine. The characteristics dynamic model single cylinder are analysed and discussed. decomposition decomposes extracts multiple single-component signals. sensitive technology complex vibration engine is formed. relationship between characteristic parameters dynamics operation law derived. A priori information about unmeasured signals...
In recirculating accelerators, and, in particular, energy-recovery linacs, the maximum current can be limited by multipass, multibunch beam breakup (BBU), which occurs when electron interacts with higher-order modes (HOMs) of an accelerating cavity on pass and again energy recovering pass. This effect is particular concern design modern high average accelerators utilizing superconducting rf technology. Experimental characterization observations instability at Jefferson Laboratory 10 kW free...
An ultrafast kicker system is being developed for the energy recovery linac (ERL) based electron circulator cooler ring (CCR) in proposed Jefferson Lab Electron Ion Collider (JLEIC, previously named MEIC). In CCR, injected bunches can be recirculated while performing ion cooling 10--30 turns before extraction, thus reducing recirculation beam current ERL to $1/10\ensuremath{-}1/30$ ($150\text{ }\mathrm{mA}\ensuremath{-}50\text{ }\mathrm{mA}$) of (up 1.5 A). Assuming a bunch repetition rate...
We report a survey of center cell shapes developed for Superconducting Radio Frequency (SRF) multi-cell cavities different projects. Using set normalized parameters, we compare the designs frequencies and particle velocities fundamental mode. dispersion curves High Order Modes (HOM) (frequency verse phase advance) calculated by MAFIA single cell, further optimize cavity shape to avoid light cone line crossing at dangerous resonance determined beam bunch structure eliminate trapped (or high...
Quarter wavelength resonator (QWR) based deflecting cavities with the capability of supporting multiple odd-harmonic modes have been developed for an ultrafast periodic kicker system in proposed Jefferson Lab Electron Ion Collider (JLEIC, formerly MEIC). Previous work on kicking pulse synthesis and transverse beam dynamics tracking simulations show that a flat-top can be generated minimal emittance growth during injection circulation cooling electron bunches. This obtained when DC component...
As a drop-in replacement for the CEBAF 8kW CW klystron system, A 1497 MHz, type high- efficiency magnetron using injection phase lock with amplitude variation is attractive. Amplitude control magnetic field trimming and anode voltage modulation has been studied MatLab/Simulink simulations [1]. Along we are planning to use an FPGA based digital LLRF which allows apply various types of algorithms in order achieve required accelerating stability. Since MHz not yet built, proof principle...
As a drop-in replacement of Continuous Electron Beam Accelerator Facility (CEBAF) 5kW CW klystron system, 1497MHz, high efficiency magnetron using injection phase lock [1] and slow amplitude variation magnetic field trimming anode voltage modulation has been studied systematically MatLab/Simulink simulations. The model is based the characteristics experiment manufacture chart on 2.45GHz cooker type magnetron. To achieve performance superconducting radio frequency (SRF) acceleration cavity...
After an initial cavity shape optimization [1] and cryomodule development [2] for Ampere-class FEL ERL, we have simulated a complete 5-cell high-current (HC) structure with six waveguide (WG) couplers Higher Order Mode (HOM) damping fundamental power coupling. MAFIA time-domain wakefield simulations been used to calculate the cavities broadband HOM impedance spectra. Microwave Studio (MWS) has in addition evaluate external Q of coupler (FPC) R/Qs HOMs. A half scale 1497 MHz single-cell model...
Long-wavelength infrared InAs/GaSb type-II superlattice PπBN photodetectors are demonstrated on GaSb substrates. The focal plane array device consists of a 2.0μm thick absorber layer and has 50% cutoff wavelength 11.3μm, maximum resistance-area product 800 Ω•cm2 at 77 K. And the stay above 500 range from -200 mV to -1100 mV. These single units show good consistency. It laid reliable foundation for manufacturing arrays.
JLab is studying options for a medium energy electron-ion collider that could fit on the site and use CEBAF as full-energy electron injector. A new ion source, linac booster would be required, together with storage rings ions electrons. In order to achieve maximum luminosity these will high current many bunches. We present level RF system requirements rings, ring high-energy beam cooling system, describe technology under consideration meet them. also staging might reduce initial capital cost...