The CMS DAQ Pinball Machine

An Example of Hybrid Systems Control : the Pinball Machine

The paper is concerned with the control of a new class of hybrid systems. By the example of a pinball machine this class is introduced in a formal way and the control problem is formulated. First ideas for the solution of the modelling and controller synthesis problems are given.

Pinball Scattering

Classical and semiclassical periodic orbit expansions are applied to the dynamics of a point particle scattering elastically oo several disks in a plane. Fredholm determinants, zeta functions, and convergence of their cycle expansions are tested and applied to evaluation of classical escape rates and quantum resonances. The results demonstrate applicability of the Ruelle and Gutzwiller type per...

A lost "pinball" in the left atrium.

Java Performance for DAQ

J ava i s a key t ec hnology for t he next gene ra ti on of dat a ac qui s it i on s ys t em s (DAQ ). J ava has excellent features, but its performance is a weak point. We evaluated various Java benchmark progr am s wi t h a J ava i nt erpr et er , J ava J us t -I n-Ti m e com pi l er s (J I T), a J ava nat i ve code compiler (TowerJ) which generates native code, and a C compiler. The benchmar...

Status of the CALICE DAQ system

A data acquisition (DAQ) system is described which will be used for the next generation of prototype calorimeters using particle flow algorithms for the International Linear Collider (ILC). The design is sufficiently generic and scalable such that it should have numerous applications either for ILC detectors or elsewhere within high energy physics in general. The DAQ system will be implemented ...