Tel Aviv, Israel

The Soreq Nuclear Research Center is a research and development institute located near the localities of Palmachim and Yavne in Israel. It operates under the auspices of the Israel Atomic Energy Commission . The center conducts research in various physical science, particularly the development of many kinds of sensors, lasers, atmospheric research, non-destructive testing techniques, space environment, nuclear safety, medical diagnostics and nuclear medicine. It also produces various types of radiopharmacuticals for use by health care organizations throughout the country.Some of the institute's research facilities include a 5MW pool-type light water nuclear reactor supplied in the late 1950s from the USA under the Atoms for Peace program and a 10MeV proton cyclotron accelerator, as well as extensive laboratory and testing facilities. Currently under construction is a 5-40 MeV, 0.04-5 mA proton and deuteron superconducting linear accelerator scheduled for commissioning in 2013.The Center is named after the nearby stream of Soreq.The Center is under the supervision of the International Atomic Energy Agency. Wikipedia.

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Method for adapting a fiber beam combiner to transmit at least 20 kW of optical power without noticeable bulk material damage mechanism effect and destructive nonlinearities, the method comprising: connecting an adiabatic beam combiner with a splice connection to an input facet of a graded index fiber which has a core doped with an index increasing material, further comprising the step(s) of: restricting the numerical aperture of the graded index fiber, and/or selecting the index increasing material with a Raman gain lower than that of Ge0_(2 )such as Al2O3 or Y2O3, and/or placing a shroud tube around the graded index fiber core, said shroud tube comprising a fluorine-doped silica tube.

Israel Atomic Energy Commission | Date: 2015-04-13

A fiber laser, null coupler acoustic Q-switch, fiber amplifier and feedback system is described for generation of high power laser pulses.

Agency: European Commission | Branch: FP7 | Program: CP-CSA-Infra | Phase: INFRA-2007-2.2-01 | Award Amount: 8.77M | Year: 2007

The SPIRAL 2 Preparatory Phase project aims to achieve the development and signing of the consortium agreement allowing for the construction of the facility. The SPIRAL 2 project located at the GANIL facility (Caen, France) will deliver energetic rare (radioactive) isotope beams with intensities not yet available with presently running machines. The studies of the properties of nuclei forming these beams or their interaction with stable nuclei is a rapidly developing field of contemporary nuclear physics, astrophysics and interdisciplinary research. Although the Region Basse-Normandie and the French funding agencies (CNRS and CEA) are financing the investment to the extend of 80% of the cost of baseline project, SPIRAL 2 seeks new partners in order to balance the construction budget both of the baseline project and of the new instrumentation necessary for experiments. The Preparatory Phase will deal with the critical financial, legal and organisational issues related to the international character of the SPIRAL 2 facility during its construction and operation phases. Searching for new funding partners will be achieved by direct contacts and negotiations between international partners, their funding agencies and the European Commission as established through the official visits, meetings and workshops. Several critical technical issues have still to be addressed in order to construct the SPIRAL2 facility and associated instrumentation. The corresponding tasks were chosen in order solve remaining technical challenges as well as to attract efficiently European partners. In particular, the accent was put on the new instrumentation for SPIRAL 2. This topic, being the most attractive for scientists, is an excellent tool to convince the funding agencies of international partners to commit for the construction phase. The attractiveness of SPIRAL 2 for outside users will be improved by the construction of new infrastructures.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: NMP-07-2015 | Award Amount: 5.00M | Year: 2015

The here proposed DIMAP project focuses on the development of novel ink materials for 3D multi-material printing by PolyJet technology. We will advance the state-of-the art of AM through modifications of their fundamental material properties by mainly using nanoscale material enhanced inks. This widens the range of current available AM materials and implements functionalities in final objects. Therefore applications will not be limited to rapid prototyping but can be used directly in production processes. DIMAP will show this transition in two selected application fields: the production soft robotic arms/joints and customized luminaires. In order to cope with these new material classes the existing PolyJet technology is further developed and therefore improved. The DIMAP project targets at the following objectives: additive manufactured joints, additive manufactured luminaires, ceramic enhanced materials, electrically conducting materials, light-weight polymeric materials, high-strength polymeric materials, novel multi-material 3D-printer and safe by design. With the development of novel ink materials based on nanotechnology improvement of the mechanical properties (ceramic enhanced and high-strength polymeric inks), the electrical conductivity (metal enhanced inks) and the weightiness (light weight polymeric materials) are achieved. Based on the voxel printing by PolyJet these new materials lead to a huge broadening of the range of available digital material combinations. Further focus points during the material and printer development are safe by design approaches, work place safety, risk assessment, collaboration with EU safety cluster and life cycle assessment. An established roadmap at the end of project enables the identification of future development needs in related fields order to allow Europe also in the future to compete at the forefront of the additive manufacturing revolution.

Raicher E.,Hebrew University of Jerusalem | Raicher E.,Israel Atomic Energy Commission | Eliezer S.,Israel Atomic Energy Commission | Eliezer S.,Polytechnic University of Mozambique | Zigler A.,Hebrew University of Jerusalem
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2015

The Klein-Gordon equation in the presence of a strong electric field, taking the form of the Mathieu equation, is studied. A novel analytical solution is derived for particles whose asymptotic energy is much lower or much higher than the electromagnetic field amplitude. The condition for which the new solution recovers the familiar Volkov wavefunction naturally follows. When not satisfied, significant deviation from the Volkov wavefunction is demonstrated. The new condition is shown to differ by orders of magnitudes from the commonly used one. As this equation describes (neglecting spin effects) the emission processes and the particle motion in Quantum Electrodynamics (QED) cascades, our results suggest that the standard theoretical approach towards this phenomenon should be revised. © 2015 The Authors.

Raicher E.,Hebrew University of Jerusalem | Raicher E.,Israel Atomic Energy Commission | Eliezer S.,Israel Atomic Energy Commission | Eliezer S.,Polytechnic University of Mozambique
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2013

In this paper we obtain analytical solutions of the Dirac and the Klein-Gordon equations coupled to a strong electromagnetic wave in the presence of a plasma environment. These are a generalization of the familiar Volkov solutions. The contribution of the nonzero photon effective mass to the scalar and fermion wave functions, conserved quantities, and effective mass is demonstrated. The wave functions exhibit differences from Volkov solutions for nowadays available laser intensity. © 2013 American Physical Society.

Kesar A.S.,Israel Atomic Energy Commission
Physical Review Special Topics - Accelerators and Beams | Year: 2010

Smith-Purcell radiation (SPR), emitted when a charge passes above a periodic grating, is important for applications such as terahertz production and nondestructive bunch-length diagnostics. The grating width is shown to become an important parameter for accurately predicting the radiation, and especially in the highly relativistic regime where the charge wakefield considerably stretches in the transverse direction. The SPR radiation is rigorously calculated by the electric-field integral equation (EFIE) method for a grating of finite width and length. The integral equation is arranged as a multilevel block-Toeplitz matrix by using symmetry under translation with respect to the grating period and width directions. Following Barrowes et al. [Microw. Opt. Technol. Lett. 31, 28 (2001)] enhanced computational efficiency can be achieved by matrix to vector projection of the essential matrix elements. A numerical example is calculated for a relativistic (γ = 36), 1-mm long, bunch traveling 0.6-mm above a ten-period grating with a period of 2.0 mm and width of 10 mm. The SPR resonance relationship and its broadening due to the finite number of grooves are consistent with the closed-form formulations. The surface current was shown to be concentrated along the center of the grating and decreasing towards its edges. The surface current, power spectrum, and radiated energy were compared to the EFIE formulation in which an infinitely wide grating was assumed. The above parameters resulted in considerable difference of up to a factor of 2.5 between the finite width and the infinitely wide grating assumption, which means that for accurate calculations the grating width should be taken into consideration. A general rule for the required grating width to achieve an accurate SPR radiation result relative to the infinite width result, and the expected accuracy by the infinite width assumption for most radiation angles, is provided. © 2010 The American Physical Society.

Kesar A.S.,Israel Atomic Energy Commission | Weiss E.,Israel Atomic Energy Commission
IEEE Transactions on Antennas and Propagation | Year: 2013

Buried antennas can be used in a variety of applications. For surface communication, parameters such as the ground conductivity and the depth of the buried antenna affect the channel attenuation between the antennas. A buried conical antenna for surface communication was developed at Soreq NRC. The antenna is axis-symmetric with two metallic plates, where the upper plate is conical and the lower is a flat disc. The wave propagation from the buried antenna is studied using an axis-symmetric finite-difference time-domain approach. It was found that the energy is radiated from the buried antenna to above the ground, where it forms a spherical surface wave. Due to the wave propagating above the ground faster than below the ground, the penetration of the surface wave into the ground is shaped as a shock wakefield. This wakefield is absorbed into the ground due to the finite ground conductivity. The shock wavefront corresponds to the Cherenkov angle , where is the ground relative dielectric permittivity. The channel attenuation from the buried antenna to a receiving antenna located either above or below the ground surface scales as 1/r4. Experimental demonstration was performed at 900 MHz. A good correlation was obtained for the channel attenuation between the experimental and simulation results, irrespective of whether the receiving antenna was located above or below the ground surface. © 2013 IEEE.

Weissman L.,Israel Atomic Energy Commission
Review of Scientific Instruments | Year: 2014

Transversal emittance measurements of intense low-energy beams involve use of collimators. As most of the beam is stopped by a collimator, a question arises whether the special conditions in the vicinity of the collimator influence emittance measurement. In particular, the secondary electrons emitted from the slit surface may affect the measurement of the beam phase distribution. We have observed significant modification in the measured phase space distribution of a 5-6 mA DC proton beam at the Soreq Applied Research Accelerator Facility low-energy transport after application of a weak magnetic field in the plane of the slit collimator. The periphery region of the phase distribution was mostly affected. The overall effect on the emittance value was as large as 20%. © 2013 AIP Publishing LLC.

Israel Atomic Energy Commission | Date: 2012-08-01

Apparatus for determining a location of a target, the apparatus comprising: first and second magnetic dipole beacons positioned at substantially a same spatial location having respectively first and second time dependent magnetic moments oriented in different directions that generate first and second magnetic fields having different time dependencies; at least one magnetic field sensor coil located at the location of the target that generates signals responsive to the first and second magnetic fields; and circuitry that receives the signals generated by the at least one sensor coil and processes the signals responsive to the different time dependencies of the magnetic fields to determine a location of the at least one sensor coil and thereby the target.

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