Animations

Autoresonance mixing

Tool: c++, Wolfram Mathematica, Adobe After Effects
By: Chukman So, Prof. Lazar Friedland
Simulation of the autoresonance excitation of particles in a nested Penning trap. The energy gained injects particles into the adjacent well where another population of particles with opposite charge is located.

Magnetised classical atom

Tool: Wolfram Mathematica
By: Chukman So
An animation visualising the classical orbit of a positron around an antiproton at a losely bound state, under a strong external magnetic field. The influence of the magnetic field means the zeroth order motion of the positron is that of gyromotion, while the 1st order correction is by the E x B drift. This results in an orbit completely different from a normal atom, leading to problems in the physical measurement of physical properties of losely bound antiatoms.

Charged species confinement in mirror trap

Tool: Wolfram Mathematica
By: Chukman So
In ALPHA a magnetic mirror is used (together with an octopole) to trap neutral antihydrogen atoms. However it can also trap charge species together with the solneoidal magnetic field, which orbit is being displayed in this animation. This can lead to residual antiprotons being trapped together with antihydrogen, and create an undesirable background to the antihydrogen signal.

E x B motion in uniform magnetic field

Tool: Wolfram Mathematica
By: Chukman So
A schmetic view of the orbit of a test particle around a cloud of positron plasma. Due to the electric field of the positron charge, the gyromotion of the test charge is perturbed by the E x B drift, which results in the test charge slowly drifting around the magnetic axis. Since the same applies to each particle in the positron cloud, this illustrates how the positron undergoes rigid body rotation in a uniform magnetic field.

Neutral trap

Tool: Wolfram Mathematica
By: Chukman So
An animation that shows the behaviour of a magnetic dipole in a neutral trap of a design similar to one used in the ALPHA apparatus, composed of an octopole and two mirror coils for radial and axial confinement respectively. Since antihydrogen atoms also possess a dipole moment, this serves as an intuitive model to visualise the function of a neutral trap. A contour map of magnetic field strength is underimposed to show the low-field seeking nature of dipoles.

Octopole and mirror construction

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
A visualisation of the physical construction of the superconducting wires in the octopole magnet and mirror coils used in the ALPHA apparatus. The geometry is simplified and does not show the staggered layering of the end loops, which is necessary to cancel out the azimuthal current around the bends, and prevent an mirror-like field from being formed.

Evaporative cooling

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
A schmetic view of the evaporative cooling process used in ALPHA to cool particle species below the ambient noise level. One side of the electrostatic wall of the Penning trap is slightly lowered to allow for the hottest particles in the thermal distribution to escape. The remaining particles rethermalise to a lower overall themperature.

Stills / artwork

ALPHA wallpaper

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
Wallpaper for ALPHA's control computers at CERN

Atom & antiatom

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
Background image for the LEAP2011 poster; made for TRIUMF, Canada
Print quality version: PNG, 16 bit / channel RGB + 8 bit alpha, 7200 x 7200 pixel

Antimatter trap and mirror world, R1

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
First concept for an image for press coverage for the ALPHA trapping breakthrough in 2010. An artistic representation of the ALPHA neutral trap is mirrored by a hydrogen gas cylinder, to emphasise the nature of the ALPHA apparatus as a container for antihydrogen, as a gas clinder hydrogen.

Atom & antiatom, R2

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
An extension for the previous version, with cardboard boxes added to extenuate the mirror nature of the two sides.
Print quality version: PNG, 16 bit / channel RGB + 8 bit alpha, 2600 x 3900 pixel

Atom & antiatom, R3

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
Another derivative, with gas clyinder being replaced with the same trap with a different colour scheme.
Print quality version: PNG, 16 bit / channel RGB + 8 bit alpha, 2600 x 3900 pixel

Atom & antiatom, CERN Courier version

Tool: Autodesk 3dsmax + mental ray
By: Chukman So
A standalone version of the ALPHA trap. Featured as cover art on the March edition of CERN Courier.
Print quality version: PNG, 16 bit / channel RGB + 8 bit alpha, 6400 x 4600 pixel