LHC@home

I would really like to see more text about the background for the project. Enough so that I really understood in depth what my CPU-time was used on: It has something to do with the changing lay-out of the ring, but that's all I know. And I am simulating how the particles move, but how? (I happen to know it's a stepwise approximation, cuz I talked to Chrulle, but that's another story - and I still don't know if it's linear or you use some of the cooler methods). Basicly: What is one result I send back being used to?

I think folding and climateprediction are very good at this, and the golomb rulers on dnet also have a very good explanation.

I know that for my part, the more info I get on a project, the more I want to get involved.

- Skov

Each result you send back (if validated) has studied the beam stability for one particular set of beam parameters, calculated by brute-force as the particles pass through all the various types of magnets and cavities of the LHC accelerator.

To give you a feeling of why it's a bit hard to popularize this, I'll quote from the Abstract to the SIXTRACK User Manual, by Frank Schmidt, the author of the system:

"Abstract
========
The aim of SixTrack is to track two nearby particles taking into account the full six-dimensional phase space including synchrotron oscillations in a symplectic manner. It allows to predict the long-term dynamic aperture which is defined as the border between regular and chaotic motion. This border can be found by studying the evolution of the distance in phase space of two initially nearby particles. Parameters of interest like nonlinear detuning and smear are determined via a post-processing of the tracking data. An analysis of the first order resonances can be done and correction schemes for several of those resonances can be calculated. Moreover there is the feature to calculate a one-turn map to very high order and the full six-dimensional case, using the LBL differential algebra. This map allows a subsequent theoretical analysis like normal form procedures which are provided by É. Forest [1]."


Hope this helps you some...

Ben Segal / LHC@home

Look and ye will learn