V. Ptitsyn
A5057178301- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Electron and X-Ray Spectroscopy Techniques
- Gyrotron and Vacuum Electronics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum Chromodynamics and Particle Interactions
- Advancements in Photolithography Techniques
- Advanced Data Storage Technologies
- Photocathodes and Microchannel Plates
- Plasma Diagnostics and Applications
- Atomic and Subatomic Physics Research
- Magnetic properties of thin films
- Physics of Superconductivity and Magnetism
- Atomic and Molecular Physics
- Distributed and Parallel Computing Systems
- Nuclear Physics and Applications
- Silicon Carbide Semiconductor Technologies
- Laser-Plasma Interactions and Diagnostics
- Advanced NMR Techniques and Applications
- Microwave Engineering and Waveguides
Brookhaven College
2014-2024
Brookhaven National Laboratory
2015-2024
RIKEN BNL Research Center
2002-2024
Cornell University
2018-2021
Thomas Jefferson National Accelerator Facility
2021
Michigan State University
2021
Old Dominion University
2019
Stony Brook University
2013-2014
Budker Institute of Nuclear Physics
2009
Office of Scientific and Technical Information
2006
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
A new experiment is described to detect a permanent electric dipole moment of the proton with sensitivity $10^{-29}e\cdot$cm by using polarized "magic" momentum $0.7$~GeV/c protons in an all-electric storage ring. Systematic errors relevant are discussed and techniques address them presented. The measurement sensitive physics beyond Standard Model at scale 3000~TeV.
Since 2001, the Relativistic Heavy Ion Collider has experienced electron cloud effects, some of which have limited beam intensity. These include dynamic pressure rises (including instabilities), tune shifts, a reduction instability threshold for bunches crossing transition energy, and possibly incoherent emittance growth. We summarize main observations in operation dedicated experiments as well countermeasures including baking, nonevaporable getter coated warm pipes, solenoids, bunch...
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 Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to GeV. However, the intrinsic spin resonances beyond are about factor 2 stronger than those below making it important examine impact these strong on survival and tolerance for vertical orbit distortions. Polarized were first accelerated...
Acceleration of polarized protons in the energy range 5 to 25 GeV is challenging. In a medium accelerator, depolarizing spin resonances are strong enough cause significant polarization loss but full Siberian snakes intolerably large orbit excursions and also not feasible since straight sections usually too short. Recently, two helical partial with double pitch design have been installed Brookhaven Alternating Gradient Synchrotron (AGS). With careful setup optics at injection along ramp, this...
In polarized proton collision experiments, it is highly advantageous to flip the spin of each bunch protons during stores reduce systematic errors. Experiments done at energies less than 2 GeV have demonstrated a spin-flip efficiency over 99%. At high energy colliders with Siberian snakes, single magnet flipper does not work because large tune spread and generation multiple, overlapping resonances. A more sophisticated flipper, constructed nine-dipole magnets, was used in BNL Relativistic...
This design report describes the construction plans for world's first multi-pass SRF ERL. It is a 4-pass recirculating linac that recovers beam's energy by 4 additional, decelerating passes. All beams are returned deceleration in single beam pipe with large-momentum-aperture permanent magnet FFAG optics. Cornell University has been pioneering new class of accelerators, Energy Recovery Linacs (ERLs), characteristic set parameters. Technology prototyped essential any high brightness electron...
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...
The physics program at the future electron ion collider (EIC) calls for polarized neutron beams high energies. best carriers are $^{3}\mathrm{He}$ nuclei and deuterons. Both expected to be utilized by spin in EIC. Owing small magnetic moment anomaly of a deuteron particle, significantly higher fields required rotation, so that full Siberian snakes not feasible. However, resonance strengths weak, number resonances is small. It possible deal with individual using conventional methods such as...
The work on the detailed design of electron‐ion collider, eRHIC, basis existing RHIC machine is underway. eRHIC aims to be an instrument for exploration important QCD aspects using collisions polarized electrons and positrons ions protons in center mass energy range 30–100 GeV, with a luminosity 1032–1034 cm−2s−1 c‐p 1030–1032 c‐Au collisions. An electron accelerator, which delivers about 0.5A beam current 5 10 would constructed at BNL, near complex intersect ion ring least one available...
Two partial Siberian snakes were used to avoid all the spin imperfection and vertical intrinsic resonances in alternating gradient synchrotron (AGS) at Brookhaven National Laboratory. However, horizontal betatron motion can cause polarization loss resulting from nonvertical stable direction presence of two snakes. This type resonance, called a was observed systematically studied AGS. A simplified analytic model numerical simulation have been developed compare with experimental data....
A considerable amount of betatron coupling in RHIC was found to originate from the interaction region (IR) triplets. series dedicated beam studies performed with goal measuring errors IR The used two different methods: local orbit bumps and action jump trajectory analysis. availability independently powered skew-quadrupole corrector elements triplets allow local, beam-based correction regions using analysed data. We also discuss plans for linear year 2001 run.
Cornell University has prototyped technology essential for any high brightness electron ERL. This includes a DC gun and an SRF injector Linac with world-record current normalized in bunch train, high-current CW cryomodule, high-power beam stop, several diagnostics tools high-brightness beams, e.g. slid measurements 6-D phase-space densities, fast wire scanner profiles, loos diagnostics. All these are now available to equip one-cryomodule ERL, laboratory space been cleared out is radiation...