P. Cameron
A5090006684- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Quantum Mechanics and Applications
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Algebraic and Geometric Analysis
- Nuclear Physics and Applications
- Biofield Effects and Biophysics
- Noncommutative and Quantum Gravity Theories
- Quantum and Classical Electrodynamics
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Mechanical and Optical Resonators
- Plasma Diagnostics and Applications
- Photocathodes and Microchannel Plates
- Advanced Data Storage Technologies
- Relativity and Gravitational Theory
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Quantum and electron transport phenomena
- Quantum, superfluid, helium dynamics
- Cosmology and Gravitation Theories
University of Cambridge
2020-2022
Brookhaven National Laboratory
2003-2014
RIKEN BNL Research Center
2002-2007
National Library of Luxembourg
2007
Stony Brook University
2007
European Organization for Nuclear Research
2006
Fermi Research Alliance
2006
Associated Universities, Inc.
1983-2003
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2003
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2003
We measured the analyzing power $A$ and spin-spin correlation parameter ${A}_{\mathrm{nn}}$, in large-${P}_{\ensuremath{\perp}}^{2}$ proton-proton elastic scattering, using a polarized-proton target beam at Brookhaven Alternating-Gradient Synchrotron. also used our polarimeter to measure small ${P}_{\ensuremath{\perp}}^{2}$ 13 GeV with good precision found some deviation from expected $\frac{1}{{P}_{\mathrm{lab}}}$ behavior. At 18.5 GeV/c we...
Accelerating polarized protons to 22 GeV/c at the Brookhaven Alternating Gradient Synchro- tron required both extensive hardware modifications and a difficult commissioning process. We had overcome 45 strong depolarizing resonances maintain polarization up in this strong-focusing synchrotron. At 18.5 we measured analyzing power A spin-spin correlation parameter Ann large- P2⊥ proton-proton elastic scattering, using proton beam target. also obtained high-precision measurement of P2⊥=0.3...
A coherent spin resonance excited by an rf dipole was used to overcome depolarization due intrinsic resonances at the Alternating Gradient Synchrotron (AGS) Brookhaven National Laboratory. We found that our data are consistent with a full flip of polarized proton beam, without emittance growth, $G\ensuremath{\gamma}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}12+{\ensuremath{\nu}}_{z}$ and $36\ensuremath{-}{\ensuremath{\nu}}_{z}$, adiabatically exciting vertical betatron oscillation...
This paper summarizes the low-loss design for Spallation Neutron Source accumulator ring [``Spallation Design Manual'' (unpublished)]. A hybrid lattice consisting of FODO arcs and doublet straights provides optimum matching flexibility injection collimation. For this lattice, optimization focuses on six goals: a space-charge tune shift low enough (below 0.15) to avoid strong resonances, adequate transverse momentum acceptance efficient beam collimation, optimized desired target shape minimal...
The spin analyzing power A in 28-GeV/c proton-proton elastic scattering was measured at ${P}_{\ensuremath{\perp}}$${\mathrm{}}^{2}$=6.5 (GeV/c${)}^{2}$ using a polarized proton target and high-intensity unpolarized beam the Brookhaven National Laboratory Alternating Gradient Synchrotron. result of (24\ifmmode\pm\else\textpm\fi{}8)% confirms that is large rising large-${P}_{\ensuremath{\perp}}$${\mathrm{}}^{2}$ region.
The analyzing power $A$ in 28-GeV/c proton-proton elastic scattering was measured with a polarized proton target and high-intensity unpolarized beam at the Brook-haven National Laboratory alternating-gradient synchrotron. ${{P}_{\ensuremath{\perp}}}^{2}$ range of 2.85 to 5.95 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ covered good precision. A small dip about -3.5% found near ${{P}_{\ensuremath{\perp}}}^{2}=3.5$ where 24-GeV/c CERN experiment had reported deep -16% large errors. In...
Using the new Brookhaven Alternating Gradient Synchrotron polarized proton beam and our target, we measured spin-spin correlation parameter ${A}_{\mathrm{nn}}$ in 16.5-GeV/c proton-proton elastic scattering. We found an of (6.1\ifmmode\pm\else\textpm\fi{}3.0)% at ${P}_{\ensuremath{\perp}}$${\mathrm{}}^{2}$=2.2 (GeV/c${)}^{2}$. also analyzing power A two independent ways, providing a good test possible experimental errors. Comparing data with 12-GeV Argonne Zero shows no evidence for strong...
The analyzing power, $A$, was measured in proton-proton elastic scattering with use of a polarized proton target and 28-GeV/c primary protons from the alternating-gradient synchrotron. Over ${{P}_{\ensuremath{\perp}}}^{2}$ range 0.5 to 2.8 ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$, data show interesting structure. There is rather sharp dip at ${{P}_{\ensuremath{\perp}}}^{2}=0.8$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ corresponding break differential cross section end...
Nonlocal reduction of entangled states is clarified by considering the role background independent scale-invariant quantum impedances in decay/decoherence unstable elementary particles, providing simple resolution black hole information paradox.
We report progress on the R&D program for electron-cooling of Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon at storage energy using 54 MeV electrons. The source will be a superconducting RF photocathode gun. accelerator recovery linac. frequency set 703.75 MHz. maximum bunch 9.38 MHz, with charge 20 nC. has following components: photoinjector and its photocathode, linac cavity, start-to-end beam dynamics magnetized electrons, cooling...
Next generation light-sources, electron coolers, high-power FELs, Compton X-ray sources and many other accelerators were made possible by the emerging technology of high-power, high-brightness beams. In order to get anticipated performance level ampere-class currents, technological barriers are yet be broken. BNL's Collider-Accelerator Department is pursuing some these technologies for its cooling RHIC application, as well a future electron-hadron collider. We will describe work on CW,...
Deuteron and gold beams have been accelerated to a collision energy of /spl radic/s = 200 GeV/u in the Relativistic Heavy Ion Collider (RHIC), providing first asymmetric-species collisions this complex. Necessary changes for mode operation include new ramping software asymmetric crossing angle geometries. This paper reviews machine performance, problems encountered their solutions, accomplishments during 16 weeks ramp-up operations.
During the RHIC 2000 run a prototype PLL tune measurement system was implemented using commercial off-the-shelf hardware. To meet requirements for feedback during 2001/2002, this migrated into BPM modules, whose flexible DSP/FPGA architecture permitted specialized processing needed tracking and acceleration, existing firewire interface provided communication with Control System. For 2003 has yet again, to state-of-the-art DSPs in VME. We report here on various improvements, extending from...
We present the design and parameters of an energy recovery linac (ERL) facility, which is under construction in Collider-Accelerator Department at BNL. This R&D facility has goal demonstrating CW operation ERL with average beam current range 0.1 - 1 ampere very high efficiency recovery. The possibility a future upgrade to two-pass also being considered. heart 5-cell 703.75 MHz super-conducting RF strong Higher Order Mode (HOM) damping. flexible lattice provides test-bed for exploring issues...
The difference ΔσT=σ(↓↑)-σ(↑↑) between the proton-proton total cross sections for protons in pure transverse-spin states, was measured at incident momenta 0.8 to 2.5 GeV/c experiments performed Los Alamos Clinton P. Anderson Meson Physics Facility and Argonne Zero Gradient Synchrotron. In agreement with other data, peaks were observed center-of-mass energies of 2.14 2.43 GeV/c2, where D21 G41 dibaryon resonances have been proposed.Received 15 October...
Four ionization beam profile monitors (IPMs) have been installed in RHIC to measure vertical and horizontal profiles the two rings. Each IPM collects measures distribution of electrons beamline resulting from residual gas during bunch passage. The are swept transversely collected on strip anodes oriented parallel axis. At each passage charge pulses amplified, integrated, digitized. system is designed single-bunch with up 120 bunches ring.
The physics interest in a luminosity upgrade of RHIC requires the development cooling-frontier facility. Detailed calculations were made electron cooling stored beams. This has been followed by beam dynamics simulations to establish feasibility creating necessary beam. accelerator will be superconducting Energy Recovery Linac (ERL). An intensive experimental R&D program engages various elements accelerator, as described 24 contributions 2007 PAC.