306 research outputs found
A sampling ADC as a universal tool for data processing and trigger application
No full textFor the particle identification via energy loss measurement and algorithm tests for the PANDA Straw Tube Tracker (STT), a new dedicated FPGA firmware for the 16 channel 240 MHz sampling ADC has been developed. New FPGA firmware can simultaneously deliver charge, amplitude and time informations which are extracted from the detector signals. It also provide the possibilities to record raw signal information in an intelligent oscilloscope mode. The sampling ADC with the new FPGA firmware has scaler capabilities and can be used for self triggering and as a coincidence unit
Application of straw detector for particle identification - Feasibility studies with PANDA STT prototype
No full textIn the PANDA experiment at the HESR antiproton storage ring of the FAIR facility in Darmstadt (Germany) the central tracker is a key element which will provide information about decay vertices, momenta and the type of charged particle emitted in antiproton annihilation. Various techniques are known for the extraction of energy-loss information from analog signals of gaseous detectors like straw chambers. These include electronical techniques as well as off-line treatment of the data. The main difficulty lies in the poor statistics of the formation of electron-ion clusters and in the strong asymmetry of the Landau distribution. A general-purpose chain of electronics and data acquisition based on sampling ADCs has been developed which permits off-line application of various techniques
The H-0 beam profile monitor at CELSIUS
No full textA beam profile monitor has been constructed for the observation of the H-0 beam emitted from the electron cooler at CELSIUS. The monitor uses a silicon strip detector for position sensitive observation of stripped H-0's. A description is given of the dete</p
The WASA Data Acquisition System (WDAQ)
No full textThe WASA Data Acquisition System (WDAQ) is described. It is a modular, and scalable network based system. The chosen structure facilitate that different did and new front-end electronics standards can work together in an efficient way. Fast hardware trigg</p
Feasibility study for the measurement of transition distribution amplitudes at ANDA in
No full textInternational audienceThe exclusive charmonium production process in p¯p annihilation with an associated π0 meson p¯p→J/ψπ0 is studied in the framework of QCD collinear factorization. The feasibility of measuring this reaction through the J/ψ→e+e- decay channel with the AntiProton ANnihilation at DArmstadt (P¯ANDA) experiment is investigated. Simulations on signal reconstruction efficiency as well as the background rejection from various sources including the p¯p→π+π-π0 and p¯p→J/ψπ0π0 reactions are performed with PandaRoot, the simulation and analysis software framework of the P¯ANDA experiment. It is shown that the measurement can be done at P¯ANDA with significant constraining power under the assumption of an integrated luminosity attainable in four to five months of data taking at the maximum design luminosity
Study of excited Ξ baryons with the P¯ANDA detector
No full textThe study of baryon excitation spectra provides insight into the inner structure of baryons. So far, most of the world-wide efforts have been directed towards N * and Delta spectroscopy. Nevertheless, the study of the double and triple strange baryon spectrum provides independent information to the N * and Delta spectra. The future antiproton experiment (P) over bar ANDA will provide direct access to final states containing a (Xi) over bar Xi pair, for which production cross sections up to mu b are expected in (p) over barp reactions. With a luminosity of L = 10(31) cm(-2) s(-1) in the first phase of the experiment, the expected cross sections correspond to a production rate of similar to 10(6) events/day. With a nearly 4 pi detector acceptance, (P) over bar ANDA will thus be a hyperon factory. In this study, reactions of the type (p) over barp -> (Xi) over bar (+)Xi*(-) as well as (p) over barp -> (Xi) over bar*(+)Xi(-) with various decay modes are investigated. For the exclusive reconstruction of the signal events a full decay tree fit is used, resulting in reconstruction efficiencies between 3 and 5%. This allows high statistics data to be collected within a few weeks of data taking.For complete list of authors see http://dx.doi.org/10.1140/epja/s10050-021-00444-5Title in WoS: Study of excited Xi baryons with the (P)over-barANDA detector</p
Feasibility studies for the measurement of time-like proton electromagnetic form factors from p ̄ p→ μ+μ- at P ̄ ANDA at FAIR
No full textThis paper reports on Monte Carlo simulation results for future measurements of the moduli of time-like proton electromagnetic form factors, | GE| and | GM| , using the p ̄ p→ μ+μ- reaction at P ̄ ANDA (FAIR). The electromagnetic form factors are fundamental quantities parameterizing the electric and magnetic structure of hadrons. This work estimates the statistical and total accuracy with which the form factors can be measured at P ̄ ANDA , using an analysis of simulated data within the PandaRoot software framework. The most crucial background channel is p ̄ p→ π+π-, due to the very similar behavior of muons and pions in the detector. The suppression factors are evaluated for this and all other relevant background channels at different values of antiproton beam momentum. The signal/background separation is based on a multivariate analysis, using the Boosted Decision Trees method. An expected background subtraction is included in this study, based on realistic angular distributions of the background contribution. Systematic uncertainties are considered and the relative total uncertainties of the form factor measurements are presented
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