Sentences with phrase «of ion beam»

An opportunity exists to work with the Surrey Ion Beam Centre as a Liaison Fellow in the application of ion beam analysis using RBS, PIXE and other complementary measurements.

My research focus was in the field of ion beam analysis (IBA), which is essentially an offshoot of nuclear physics in which accelerator - based techniques are applied to a large variety of analytical problems, and an opportunity arose for me to continue my work at the National University of Singapore (NUS).

But the US team did not have access to a wide range of ion beams, such as those capable of probing the heaviest, most exotic atoms.

Not exact matches

Researchers have proposed a new way to detect radioactive material using two co-located laser beams that interact with elevated levels of oxygen ions near a gamma - ray emitting source.

Scientists might use these tractor beams to separate mixtures of atoms or ions, for example, reeling in one type but not another.

Creating an image requires a beam of helium or neon ions.

By using this high - power laser, it is now possible to generate all of the high - energy quantum beams (electrons, ions, gamma ray, neutron, positron).

Petawatt lasers are used for study of basic science, generating such high - energy quantum beams as neutrons and ions, but only a few facilities in the world have Petawatt laser.

In the latest work, carried out by physicist Kilian Singer of the University of Mainz in Germany and colleagues, the calcium ion doubles as both the working medium and the piston; electrical noise provides the hot bath, and a laser beam the cold bath.

This matters for the optimisation of ion - beam cancer therapy, which requires a thorough understanding of the relation between the physical characteristics of the incoming ion beam and its effects on biological tissues.

In nuclear medicine, ion beams — using protons and carbon ions — have been used clinically in the radiotherapy treatment of cancer tumours since the 1990s.

An ion thruster (or ion drive), one of several types of spacecraft propulsion, uses beams of ions - electrically charged atoms or molecules - for propulsion.

The isotopes in the sample are formed into an ion beam that is detected at the far end of the mass spectrometer, where the number of isotopes are counted.

They use electric fields to accelerate a beam of positively charged xenon gas ions, which shoot out of the spacecraft at speeds of up to 90,000 mph.

They used a scanning electron microscope and focused ion beam to obtain thin - slice images of the membrane, which they analyzed with software, rebuilding the three - dimensional structure of the membranes to determine fuel cell longevity.

Those technologies include the «driver» used to crush the fuel capsule, such as lasers, heavy ion beams, or powerful pulses of electric current.

After chemists at Livermore produced a rare isotope of the element americium, they shipped it to their Russian colleagues, who beamed calcium ions at it with the accelerator.

«We examined the samples with electron microscopy using thin layers cut out of the composite with ion beams,» explains Tobias Kraus, Division Head for Structure Formation at INM.

Then, they'll fire beams of heavy ions such as uranium at the container until the water within is sweltering under temperatures thousands of degrees Kelvin and pressures of several million atmospheres.

He first depicted its surface using SPM and then repeated the process 12 times, shaving away a 100 nanometer layer of the sample with a beam of oxygen ions before each step.

Researchers there smashed together beams of protons with beams of lead ions, producing showers of subatomic particles that flew away in all directions at high speed.

Two types of electric rockets are currently in use: the ion thruster, which generates thrust using a beam of positive xenon ions, and the Hall thruster, which uses xenon ions and electrons for propulsion.

The GFZ's Anja Schreiber prepared these slices using a focussed beam of charged atoms (ions) to ablate the surface.

On the other hand, negative hydrogen / deuterium ion beams sustain the energy - independent neutralization efficiency of ~ 60 %.

To this point, regarding the processes concerning the beam production through the extraction of negative hydrogen ions, although many simulations have been conducted, because numerous physical processes are related to this issue we still have not obtained results that will help explain the experimental results.

Accompanying the beam extraction, the spatial flow distribution of the negative hydrogen ions was investigated by measuring the flow of negative hydrogen ions with the use of a compound - type electrostatic probe with four needle - type electrodes irradiated by laser pulse.

Specifically, they measured hydrogen and its isotope, deuterium (hydrogen with an extra neutron in its nucleus) with ion microprobes, which use a focused beam of ions to sputter ions from a small rock sample into a mass spectrometer.

By applying the method developed in this research, measurement of the negative ion flow at places still closer to the plasma electrode is possible for clarifying more detailed mechanism of the negative ions extracted as a beam.

The mechanism of how the negative hydrogen ions change the direction of their velocity and are extracted as a beam has not been clarified.

The beam passed through a chamber where a laser knocked the extra electrons off of about 7 % of the ions, leaving a mix of hydrogen and negatively charged hydrogen ions to react with each other farther down the tube.

To make it happen, Savin and his colleagues, including Holger Kreckel, who is now at the University of Illinois, Urbana - Champaign, first generated a beam of negatively charged hydrogen ions and sent it barreling down a tube.

These operations were conducted at numerous places, and, during the beam extraction, we investigated how the flow of negative hydrogen ions changed.

The behaviors of negative hydrogen ions can be clarified under the beam extraction.

The tree - like formations in this molten salt formed under the high - radiation of a transmission electron microscope beam; the jet of ions from the material could serve as a thruster for a nanosatellite

Indeed, when the team collided a beam of nickel - 58 ions with a target made of a natural mixture of nickel isotopes at the National Heavy Ion Accelerator (GANIL) in Caen, France, the researchers managed to spot just two fleeting nickel - 48 nuclei.

Development of neutral beam injection (NBI) heating system utilizing a hydrogen / deuterium (H / D) negative ion source, is significant for a fusion plasma reactor, which is one of the potential solutions to future energy - resource problems.

Most of the segments were sent to Eastman - Kodak in the US to take advantage of a new milling technique which uses an ion beam to produce an almost perfect surface.

Chemical imaging involves the use of a laser or ion beam to analyse the sections of skin using a mass spectrometer.

Although researchers are trying to drill such crystals with beams of ions, none have succeeded yet.

Multiple carefully tuned laser beams apply an oscillating force to a pair of ions.

After the initial nine - week part of the run, RHIC physicists will begin a series of experiments they've never done before — collisions of polarized protons in one beam with a beam of heavier ions (first gold, for about five weeks, then a shorter two - week run with aluminum).

Ideas abounded: using ion engines to ferry up the components of a moon base; beaming power to robotic rovers on the Martian moon Phobos; attaching high - power Hall effect thrusters to the International Space Station (ISS) and putting it on a Mars cycler orbit; preplacing chemical rocket boosters along an interplanetary trajectory in advance so astronauts could pick them up along the way; using exploration pods like those in 2001: A Space Odyssey rather than space suits; instead of sending astronauts to an asteroid, bringing a (very small) asteroid to astronauts at the space station.

The scientists aimed beams of heavy ions at targets of certain elements to produce nuclei with 75 neutrons and 55, 57, 59 or 61 protons in a wide range of spin states.

This is a cross-sectional scanning electron microscopy images of a 750 nm period grating fabricated by focused ion beam milling in a 300 nm thick amorphous germanium antimony telluride film on silica.

In the end, the strong separation of negatively charged electrons and now positively charged atoms, or ions, creates the forces that accelerate an ion beam toward the tumor.

This beam is transferred to a mass spectrometer for identification and counting of the ions.

The team will then shoot beams of various neutron - rich ions at a plastic target full of deuterium, a heavy form of hydrogen in which the nucleus contains a proton and a neutron.

Porous silicon has been made to glow under many types of excitation, including X-rays, intense pulses of infrared photons, and electron and ion beams.

It can also refocus the beam so that the spectrometer can separate the different species of ions more efficiently.

Instead of the existing semicircular shape, the new magnet will completely enclose the ion beam.