The following research paper presents an up-to-date status of the testing of a Dual-Mode Scramjet (DMSJ) model which is experimentally operated at UVa’s Aerospace Research Laboratory. The optical technique Stereoscopic Particle Image Velocimetry (SPIV) is applied to the combustor of the DMSJ with a ramp fuel injector configuration. SPIV is utilized to measure the three-dimensional, combusting, ...

A train of 2-ns micro bunches of longitudinally polarized electrons are generated in a 120-kV DC-gun based injector in the ILC electron source; a bunching system with extremely high bunching efficiency to compress the micro-bunch down to 20 ps FWHM is designed. Complete optics to transport the electron bunch to the entrance of the 5-GeV damping ring injection line is developed. Start-to-end mul...

This paper presents a feasibility study for a MSE diagnostic on the TCV tokamak. A numerical simulation code has been used to identify the optimal port arrangement and geometrical layout. It predicts the expected measurement accuracy for a range of typical plasma scenarios. With the existing Neutral Particle Injector and a detection system based on current day technology, it should be possible ...

This paper describes a beam dynamics codèPICN' for simulation of high current proton beams in an isochronous azimuthally-varying-eld cyclotron. It is assumed that the median plane and vertical motions are decoupled, so that the internal space-charge forces can be calculated by a particle-in-cell method applied to the median plane charge distribution. We assume operation in a regime where vertic...

An Imaging Neutral Particle Analyser (INPA) diagnostic has been designed for the ASDEX Upgrade (AUG) tokamak. The AUG INPA will measure fast neutrals escaping plasma after CX reactions. be ionised by a 20 nm carbon foil and deflected towards scintillator local magnetic field. use of neutral beam injector (NBI) as active source provide radially resolved measurements while component allow us to c...

An independent assessment of the physics of Ignitor is presented. Ignitor is a physics demonstration experiment, with the main goal of achieving thermonuclear ignition, defined as the regime where fusion alpha heating compensates for all forms of energy losses. Simulations show that a pulse of α particle power up to 10-20 MW is produced for a period over a few seconds. Crucial issues are the pr...

The paper presents the recent measurements of ion beams emitted from an RPI-IBIS plasma injector and some preliminary results of the theoretical modeling. The RPI-IBIS facility was equipped with coaxial electrodes made of thin molybdenum rods and a fast acting electromagnetic valve for the injection of a working gas. Plasma discharges were initiated with a variable time delay (τ ) after the gas...

Ultracold electron sources based on near-threshold photoionization of laser-cooled atomic gases can produce ultrashort electron pulses with a brightness potentially exceeding conventional pulsed electron sources. They are presently being developed for single shot ultrafast electron diffraction, where a bunch charge of 100 fC is sufficient. For application as an injector for x-ray free electron ...

Decreasing the co-extracted electron current while simultaneously keeping negative ion (NI) current sufficiently high is a crucial issue on the development plasma source system for ITER Neutral Beam Injector. To support finding the best extraction conditions the 3D Particle-in-Cell Monte Carlo Collision electrostatic code ONIX (Orsay Negative Ion eXtraction) has been developed. Close collaborat...

The generation of 1–5 MeV protons from the interaction of a 3 ps TW CO2 laser pulse with a gas target with a peak density around the critical plasma density has been studied by 2D particle-in-cell simulations. The proton acceleration in the preformed plasma with a symmetric, linearly ramped density distribution occurs via formation of sheath of the hot electrons on the back surface of the targe...