Hera-b 98{206 Software 98{026 Ranger { a Pattern Recognition Algorithm for the Hera-b Main Tracking System Part Iii: Tracking in the Trigger Chambers
A tracking algorithm based on the Concurrent Track Evolution method has been developed to propagate track candidates which have been found in the main tracking system between vertex detector and RICH into the \trigger chamber" area between RICH and electromagnetic calorimeter. The performance of the method is tested on HERA-B Monte Carlo events with full detector simulation and in the framework of the current software environment.
Ranger { a Pattern Recognition Algorithm for the Hera-b Main Tracking System Part I: the Hera-b Pattern Tracker
A pattern recognition strategy for the HERA-B main tracking system is presented. A concurrent track evolution algorithm has been developed to select the optimal track candidate compatible with a seed. Intrinsically a local method, it combines the virtues of track following procedures with the necessary ability to optimize between many available paths in a high occupancy environment. The problem of hit-location in a multiplanar detector geometry is solved with an approach called domain navigation. This note gives a detailed description of the algorithm and shows its performance, which has been evaluated using HERA-B Monte Carlo events with full detector simulation and the current spectrometer geometry implementation, which is already quite realistic.
Microwave source with enhanced radiation power based on orbitron MASERs
We have proposed the design of high power microwave source in a vacuum tube based on the theory of negative mass instability. The proposed source does not operate based on a slow-wave structure but instead makes use of accelerated charged particles. In our structure, an electron emitter injects the charged particles into to the cavity. Emitted particles move around the anode, which leads to electron acceleration and emission of electromagnetic waves with a specific frequency. In this paper, we have enhanced the output power and frequency of microwave source by variation of particles initial energy and the number of anodes incorporating their specific arrangement and applied voltages. Working at room temperature, compactness, wide bandwidth, and tunability of output frequency are among the advantages of the proposed source.