A5049825264- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Particle accelerators and beam dynamics
- Ion-surface interactions and analysis
- Atomic and Molecular Physics
- Plasma Diagnostics and Applications
- Particle Accelerators and Free-Electron Lasers
- Diamond and Carbon-based Materials Research
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Laser Design and Applications
- Superconducting Materials and Applications
- Laser Material Processing Techniques
- Laser-Matter Interactions and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Therapy and Dosimetry
- Pulsed Power Technology Applications
- Particle Detector Development and Performance
- Metal and Thin Film Mechanics
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Chemical and Physical Properties of Materials
- Fusion materials and technologies
- Mass Spectrometry Techniques and Applications
- Optical Systems and Laser Technology
Brookhaven National Laboratory
2014-2024
Massachusetts Institute of Technology
2023
Thomas Jefferson National Accelerator Facility
2023
Goethe University Frankfurt
2013
Kyushu University
2006-2010
RIKEN
2008-2010
Nippon Soken (Japan)
2008-2010
Pulse length extension of highly charged ion beam generated from a laser source is experimentally demonstrated. The (LIS) has been recognized as one the most powerful heavy source. However, it was difficult to provide long pulse beams. By applying solenoid field (90 mT, 1 m) at plasma drifting section, carbon reached 3.2 μs which 4.4 times longer than width conventional LIS. particle number ions accelerated by radio frequency quadrupole linear accelerator 1.2 × 1011, provided single J Nd-YAG...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation E. Beebe, J. Alessi, S. Binello, T. Kanesue, D. McCafferty, Morris, M. Okamura, A. Pikin, Ritter, R. Schoepfer; Reliable operation of the Brookhaven EBIS for highly charged ion production RHIC NSRL. AIP Conference Proceedings 9 January 2015; 1640 (1): 5–11. https://doi.org/10.1063/1.4905394 Download citation...
The idea of direct plasma injection scheme (DPIS) was proposed in 2000. This new technique has been studied and proven to accelerate intense ion beams. To provide medium mass ions with highly charged states, small tabletop solid lasers were used for production. Based on the measured properties, aluminum carbon accelerated more than 60 mA current. next experiments will use an radio frequency quadrupole designed q/m=1/6 explore beam productions using targets up silver, future work production...
A laser ion source (LIS) can easily provide a high current beam. However, it has been difficult to obtain longer beam pulse while keeping current. On occasion, pulses are required by certain applications. For example, more than 10 μs of is for injecting highly charged beams large sized synchrotron. To extend width, solenoid field was applied at the drift space LIS Brookhaven National Laboratory. The suppressed diverging angle expanding plasma and widened. Also, observed that state conserved...
Charge state and energy distributions of ions generated by a 3J∕30ns Nd-glass laser were measured at distance 3.7m from the target for seven different elements Periodic Table two power densities (of order 1011 1012W∕cm2). Two groups found: highly charged with ionization potentials in range 500–1000eV registered all between C12 Fe56; same time, about-one-order-less Ge74 Ta181. The most probable reason such big difference is recombination losses during laser-produced plasma expansion into...
Abstract At Brookhaven National Laboratory (BNL), the LION2 ion source is being constructed to replace an existing laser ablation (LIS) at EBIS facility, which provides heavy beams of multiple species for operation NASA Space Radiation (NSRL) and Relativistic Heavy Ion Collider (RHIC). The LION1 currently singly charged ions Li, B, C, O, Al, Si, Ca, Ti, Fe, Cu, Zr, Nb, Ag, Tb, Ta, W, Au, Bi, Th with a rapid-species-change capability. An electron beam source, Extended-EBIS captures, confines,...
Brookhaven National Laboratory has developed the new preinjector system, electron beam ion source (EBIS) for relativistic heavy collider (RHIC) and Aeronautics Space Administration Radiation Laboratory. Design of primary provider is an essential problem since it required to supply beams with different species multiple users simultaneously. The laser a defocused can provide low charge state emittance beam, candidate RHIC-EBIS. We show suitable design appropriate drift length solenoid, which...
Abstract As an alternative to research nuclear reactors, a compact accelerator-driven neutron generator that uses lithium beam driver could be promising candidate since it produces almost no undesired radiation. However, providing intense lithium-ion has been difficult, and thought the practical application of such device would impossible. The most critical problem insufficient ion fluxes solved by applying direct plasma injection scheme. In this scheme, pulsed high-density from metallic...
Laser ion source (LIS) is a candidate among various heavy sources. A high density plasma produced by Nd:yttrium aluminum garnet laser with drift velocity realizes current and charge state beams. In order to obtain higher beam current, we made experiments using the LIS magnetic field which confinement effect can make current. We measured total Faraday cup analyzed distribution electrostatic analyzer. It shown that permanent magnet.
We studied proton beam production from a laser ion source using hydrogen rich target materials. In general, gas based species are not suitable for sources since formation of dense is difficult. order to achieve reliable operation, we tested hydride targets sub nanosecond Q-switched Nd-YAG laser, which may help suppress material consumption. detected enough yields protons titanium without degradation current during the experiment. The combination and compressed provide stable beam.
Extracted ion beams from the test laser source (LIS) were transported through a beam transport line which is almost identical to actual primary in current electron apparatus. The tested species C, Al, Si, Cr, Fe, Cu, Ag, Ta, and Au. all measured currents fulfilled requirements. However, case of light mass ions, recorded emittance shapes have larger aberrations RMS values are higher than 0.06 π mm mrad, design goal. Since we margin enhance current, if then allow some losses at injection...
A laser ion source coupled with a radio frequency quadrupole linac accelerator is being proposed as suitable system for the production of low energy, high-current stable lithium beam. In order to maximize yield, plasmas generated by ablation different materials based on (Li, LiOH, and LiNbO3) have been characterized using Faraday cup an electrostatic analyzer in time flight configuration. wide range power density has investigated (109-1012 W/cm2) two Nd:YAG lasers operating at wavelengths...
To create mixed species ion beam with laser pulses, we investigated charge state distributions of plasma formed from both Al-Fe alloy targets and pure Al Fe placed close together. With two targets, observed that the kinds atoms were when interval pulses was large enough (40 μs). On other hand, 0.0 μs, fewer ions they did not mix well ions. The in target. Furthermore, specific states increased. From results, it determined can use to whose difference drift velocity is large. must an target...
Calcium and lithium ion beams are required by NASA Space Radiation Laboratory at Brookhaven National to simulate the effects of cosmic radiation. To identify difficulties in providing such highly reactive materials as laser targets, both species were experimentally tested. Plate shaped calcium targets fabricated create ablation plasmas with a 6 ns 1064 nm neodymium-doped yttrium aluminum garnet laser. We found significant oxygen contamination Ca Li high charge state due rapid oxidation...
The LION source is a new laser ion (LIS), which was installed and commissioned at Brookhaven National Laboratory (BNL) for low charge state heavy production as an external of primary ions RHIC-EBIS. This the first LIS to be combined with Electron Beam Ion Source type long term user operation. After short commissioning, started provide various species NASA Space Radiation (NSRL) since March, 2014, Gold beam has been provided RHIC June, 2014.
To generate laser ablation plasma, a pulse is focused onto solid target making crater on the surface. However, not all evaporated material efficiently converted to hot plasma. Some portion of could be turned low temperature plasma or just vapor. investigate mechanism, we prepared an aluminum coated by thin carbon layers. Then, measured properties with different thicknesses plate. The results showed that C6+ ions were generated only from surface layer. deep layers (over 250 nm surface) did...
Charge state 1+ions are required as a primary ion source for Relativistic Heavy Ion Collider-electron beam (RHIC-EBIS) at BNL and laser (LIS) is candidate one of the external since low energy charge ions can be generated by lower power density irradiation onto solid target surface. Plasma properties (27)Al, (56)Fe, (181)Ta using second harmonics Nd:yttrium aluminum garnet (0.73 J5.5 ns 532 nm wavelength) generation was measured. distribution Ta optimized 1+with estimated 9.1 x 10(8) Wcm(2)...
In a laser ion source, plasma drift distance is one of the most important design parameters. Ion current density and beam pulse width are defined by between target extraction position. direct injection scheme, which uses source radio frequency quadrupole linac, we can apply relatively higher electric field at due to unique shape positively biased electrode. However, when aim very high acceleration such as several tens milliamperes, observed mismatched conditions. We tested three different...
We are proposing a compact neutron generator based on Li beam driver. The proposed comprises laser ion source, radio-frequency quadrupole linear accelerator (RFQ linac), drift tube linac, and target containing protons. In the generator, lithium is used as projectile instead of protons to utilize kinematic focusing technique. technique enables us enhance flux without increasing energy, which important develop clean generator. Moreover, combination source RFQ linac with direct plasma injection...