Heavy-ion positrons explained

Bremsstrahlung from Electrons and Positrons in Peripheral Relativistic Heavy Ion Collisions

We study the spectrum of the bremsstrahlung photons coming from the electrons and positrons, which are produced in the strong electromagnetic fields present in peripheral relativistic heavy ion collisions. We compare different approaches, making use of the exact pair production cross section in heavy ion collisions as well as the double equivalent photon approximation. 25.75.-q,13.40.-f Typeset...

An ion trap for cooling MCIs with cold positrons

An electro-magnetic trap for cooling multi-charged ions (MCIs) with cold positrons has been designed and is now under construction. A 5-tesla superconducting solenoid in which the trap will be installed has been constructed and installed in the experimental hall. The cooling scheme of MCIs is as follows: 1) loading electrons in the trap on which an electric harmonic potential is applied, 2) coo...

Heavy-ion Radiography and Heavy-ion Computed Tomography

Heavy Ion Fusion Sources*

In Heavy-Fusion and in other applications, there is a need for high brightness sources with both high current and low emittance. The traditional design with a single monolithic source, while very successful, has significant constraints on it when going to higher currents. With the Child-Langmuir current-density limit, geometric aberration limits, and voltage breakdown limits, the area of the so...

heavy ion collision

A model for energy, pressure and flow velocity distributions at the beginning of ultra-relativistic heavy ion collisions is presented, which can be used as an initial condition for hydrodynamic calculations. Our model takes into account baryon recoil for both target and projectile, arising from the acceleration of partons in an effective field, F µν , produced in the collision. The typical fiel...