The STAR detector magnet subsystem

Brown, Richard; Etkin, A.; Foley, K. J.; Leonhardt, W.; Mills, J.; Polk, I.; Rodger, E.; Scheblein, J.; Schlueter, R.

doi:10.1109/pac.1997.753164

Cited by 3 publications

(2 citation statements)

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“…The yoke comprises two support rings, 24 barrel beams, two poles with trim coils and transportation platforms, and a support structure consisting of two cradles, six stationary supports and four roller skates (see figure 2). The MPD yoke design is similar to the yoke design of STAR magnet [9]. The masses of main components are presented in table 9.…”

Section: Flux Return Yokementioning

confidence: 99%

Superconducting solenoid magnet for the Multi-Purpose Detector at the NICA facility

et al. 2014

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The Multi-Purpose Detector (MPD) is a 4π spectrometer to be used for studying charged hadrons, electrons and photons generated in heavy ion collisions at energies provided by the NICA collider of the Joint Institute for Nuclear Research (Dubna). A constituent part of MPD is a solenoid magnet with superconducting NbTi coil and steel flux return yoke. The magnet is intended for providing a highly homogeneous magnetic field of 0.5 T in an aperture of 4596 mm in diameter to ensure the transverse momentum resolution within the range of 0.1-3 GeV/c at NICA. The mass of the magnet is eight hundred tons. Structurally, the MPD magnet yoke is a cylindrical barrel-like structure, which consists of 24 beams that return the magnetic flux of the coil, two support rings, two poles and two support cradles that carry the total weight of the detector. The stainless cryostat with the superconducting coil is rigidly fixed inside the yoke barrel. The structural arrangement of the yoke guarantees high rigidity of the whole magnet and will ensure the required field homogeneity and integral of the radial magnetic induction component in the TPC region after subsequent withdrawals of the poles and multiple movements of the magnet to the assembly site for updating or repair. The coil is a one-layer solenoid made of an aluminum stabilized superconductor. The conductor is wound onto inside the aluminum support cylinder. The cooling method chosen for

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Section: Flux Return Yokementioning

confidence: 99%

Superconducting solenoid magnet for the Multi-Purpose Detector at the NICA facility

et al. 2014

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“…The central detecting systems of the STAR experiment are located inside a large cylindrical magnet designed to deflect the trajectories of charged particles and measure their impulses [26]. The magnet measures 7.32 m in diameter, 7.25 m in length, and weighs 1100 tons.…”

Section: Star Solenoid Magnetmentioning

confidence: 99%

Cellular automaton based track finder in the STAR experiment (BNL, USA)

Kozlov¹

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The relevant field of interest in High Energy Physics experiments is shifting to searching and studying extremely rare particles and phenomena. The search for rare probes requires an increase in the number of available statistics by increasing the particle interaction rate. The structure of the events also becomes more complicated, the multiplicity of particles in each event increases, and a pileup appears. Due to technical limitations, such data flow becomes impossible to store fully on available storage devices. The solution to the problem is the correct triggering of events and real-time data processing. In this work, the issue of accelerating and improving the algorithms for reconstruction of the charged particles' trajectories based on the Cellular Automaton in the STAR experiment is considered to implement them for track reconstruction in real-time within the High-Level Trigger. This is an important step in the preparation of the CBM experiment as part of the FAIR Phase-0 program. The study of online data processing methods in real conditions at similar interaction energies allows us to study this process and determine the possible weaknesses of the approach. Two versions of the Cellular Automaton based track reconstruction are discussed, which are used, depending on the detecting systems' features. HFT~CA Track Finder, similar to the tracking algorithm of the CBM experiment, has been accelerated by several hundred times, using both algorithm optimization and data-level parallelism. TPC~CA Track Finder has been upgraded to improve the reconstruction quality while maintaining high calculation speed. The algorithm was tuned to work with the new iTPC geometry and provided an additional module for very low momentum track reconstruction. The improved track reconstruction algorithm for the TPC detector in the STAR experiment was included in the HLT reconstruction chain and successfully tested in the express production for the online real data analysis. This made it possible to obtain important physical results during the experiment runtime without the full offline data processing. The tracker is also being prepared for integration into a standard offline data processing chain, after which it will become the basic track search algorithm in the STAR experiment.

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