Patrick Inacker
A5036212865- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Photocathodes and Microchannel Plates
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Silicon and Solar Cell Technologies
- Plasma Diagnostics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Laser-Plasma Interactions and Diagnostics
- Advanced X-ray Imaging Techniques
- Advancements in Photolithography Techniques
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Photonic and Optical Devices
- Gyrotron and Vacuum Electronics Research
- Laser Design and Applications
- High-Energy Particle Collisions Research
Brookhaven National Laboratory
2017-2024
Fermi National Accelerator Laboratory
2021
Continuous-wave photoinjectors operating at high accelerating gradients promise to revolutionize many areas of science and applications. They can establish the basis for a new generation monochromatic x-ray free electron lasers, high-brightness hadron beams, or microchip production. In this Letter we report on record-performing superconducting rf gun with ${\mathrm{CsK}}_{2}\mathrm{Sb}$ photocathode. The is generating charge bunches (up $10\text{ }\text{ }\mathrm{nC}/\text{bunch}$) low...
Cooling of beams gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens possibility this technique higher energies than possible electrostatic acceleration beams. The challenges include generation suitable for cooling, delivery required quality to cooling sections without degradation beam angular divergence energy spread,...
The high intensity polarized electron source is a critical component for future nuclear physics facilities. electron-ion collider requires gun with higher voltage and bunch charge compared to any existing source. At Brookhaven National Laboratory, we have built an inverted direct current (HVDC) photoemission large cathode size. We report on the performance of GaAs photocathodes in gradient up 16 nC charge. measurements were performed at stable operating gap 300 kV—demonstrating outstanding...
The polarized electron source is a critical component in accelerator facilities such as the electron–ion collider, which requires gun with higher voltage and bunch charge than existing sources. One challenge we faced was surface limit of distributed Bragg reflector GaAs/GaAsP superlattice (DBR-SL-GaAs) photocathode. We suppressed this effect by optimizing doping heat cleaning procedures. achieved up to 11.6 nC beam. In report, discuss performance tests DBR-SL-GaAs photocathode high direct...
The Low Energy RHIC electron Cooling (LEReC) project at Brookhaven National Laboratory recently demonstrated for the first time cooling of hadron bunches with radio-frequency (rf) accelerated bunches. LEReC uses a high-voltage photoemission gun stringent requirements beam current, quality, and stability. has photocathode high-power fiber laser, novel cathode production, transport, exchange system. It been that can continually produce high-current quality suitable cooling. We describe...
A high-current high-brightness electron accelerator for low-energy RHIC cooling (LEReC) was successfully commissioned at Brookhaven National Laboratory. The LEReC includes a dc photoemission gun, laser system, photocathode delivery magnets, beam diagnostics, superconducting rf booster cavity, and set of normal conducting cavities to provide enough flexibility tune the in longitudinal phase space. Cooling with nonmagnetized accelerated beams requires corrections obtain small momentum spread...
In this paper we describe a new microbunching instability occurring in charged particle beams propagating along straight trajectory. The nature of these exponentially growing plasma oscillations gave the reason for its name: plasma-cascade instability. Such can strongly amplify longitudinal originating from beam's shot noise, even to point saturation. Resulting random density and energy microstructures drastically reduce beam quality. Conversely, such drive novel high-power sources broadband...
Coherent electron cooling experiment is aimed for demonstration of the proof-of-principle reduction energy spread a single hadron bunch circulating in RHIC. The beam should have required parameters and its orbit be matched to beam. In this paper we present achieved including emittance, spread, other critical indicators. operational issues as well future plans are also discussed.