scholarly journals Study of the performance of prototypes of straw tube tracker by measuring cosmic rays

2019 ◽  
Vol 199 ◽  
pp. 05022
Author(s):  
Akshay Malige ◽  
Grzegorz Korcyl ◽  
Narendra Rathod
Keyword(s):  
Cosmic Rays ◽  
Energy Loss ◽  
Spatial Resolution ◽  
Charged Particles ◽  
Electromagnetic Calorimeter ◽  
Clock Signal ◽  
Track Reconstruction ◽  
Panda Experiment ◽  
Straw Tube ◽  
Individual Detector

Straw tube detector developed for the PANDA experiment in [1], will be used for tracking and identifcation of charged particles in the Forward Tracker (FT). The detector read-out will be incorporated in PANDA DAQ running in trigger-less mode by means of Synchronization Of Data Acquisition Network (SODAnet). SODAnet is the protocol used to synchronize individual detector subsystems by providing a common clock signal and timestamps. The reconstruction of events out of many fragments is done with the Burst Building Network. The first tests of such system have been performed with prototypes of FT and ElectroMagnetic Calorimeter modules (EMC) in [1] measuring cosmic rays. Those tests allow to evaluate the detectors as well as the synchronization and processing systems. The reconstruction of particle tracks has been developed and evaluated. The results on the track reconstruction, spatial resolution and energy loss via Time over Threshold (TOT) method is described together with the DAQ performance.

ENERGY LOSS OF HIGHLY CHARGED PARTICLES PRODUCED BY FISSION AND BY COSMIC RAYS: SECTION II. PHOTOMETRIC MEASUREMENTS ON FISSION FRAGMENTS

1953 ◽  
Vol 31 (1) ◽  
pp. 97-111 ◽  
Author(s):  
Roger Mathieu ◽  
Pierre Demers
Keyword(s):  
Cosmic Rays ◽  
Light Intensity ◽  
Energy Loss ◽  
Optical Density ◽  
Charged Particles ◽  
Light Sensitivity ◽  
Characteristic Curves ◽  
Fission Tracks ◽  
Fission Fragments ◽  
Photometric Measurements

A sensitive and accurate photometer is described, which is designed to measure directly the light intensity transmitted through very small objects placed under the microscope at the highest resolving powers. Tracks of mesons, protons, α rays, and fission fragments were examined with it, characteristic curves relating optical density D and ionizing power I were obtained and show the feature, unusual for light sensitivity, of two sensitive regions separated by a region of very low gamma. The variation of optical density and of width with ionizing power is discussed for three types of emulsion. Measurements on fission tracks are analyzed to derive a single range ionization relation I = 1.22 + 0.738 R, in Mev. and microns, applicable to both heavy and light fragments, in agreement with Section I. The controversial literature on this matter is discussed.

ENERGY LOSS OF HIGHLY CHARGED PARTICLES PRODUCED BY FISSION AND BY COSMIC RAYS: III. THE LINEAR DENSITY OF DELTA RAYS. EXPERIMENTS

1953 ◽  
Vol 31 (4) ◽  
pp. 480-496 ◽  
Author(s):  
Pierre Demers ◽  
Zofia Lechno-Wasiutynska
Keyword(s):  
Cosmic Rays ◽  
Energy Loss ◽  
Energy Distribution ◽  
Linear Density ◽  
Charged Particles ◽  
New Method ◽  
Low Velocity ◽  
Relativistic Corrections ◽  
Comparison With Experiment

Delta rays having an energy as low as 2–5 kev. have been counted along the tracks of mesons, protons, and α rays of low velocity, allowing the identification of each. Three methods are presented and applied to determine the efficiency ƒ of counting delta rays of various energies; measured values of ƒ vary between 0.05% at 2 kev. and 100–180% near 50 kev. The number of grains, and the energy distribution among visible delta rays, are analyzed. A new method of determining velocity, based on the analysis of the number of grains in the delta rays, is presented. In the Appendix, the effect of relativistic corrections is computed and discussed. It is small except at large velocities where comparison with experiment is difficult.

ENERGY LOSS OF HIGHLY CHARGED PARTICLES PRODUCED BY FISSION AND BY COSMIC RAYS: SECTION I. OBSERVATIONS OF FISSION FRAGMENTS

1953 ◽  
Vol 31 (1) ◽  
pp. 78-96 ◽  
Author(s):  
Pierre Demers
Keyword(s):  
Cosmic Rays ◽  
Energy Loss ◽  
Charged Particles ◽  
Velocity Curve ◽  
The Other ◽  
Stopping Power ◽  
Light Fragment ◽  
Fission Fragments

Measurements on the range of the tracks of fission fragments recorded in special laboratory-made emulsions are reported. The origin was marked so that observations on length not possible otherwise were made. Stopping power and straggling for such tracks in different media are discussed. It is shown, that the range of one fragment is little dependent on the range of the other paired fragment. The blackening of the two tracks near the origin is on the average unequal, that of the light fragment L being darker. It is inferred that ionization is greater near the origin for the L fragment. Knock-on protons allow a range velocity curve to be drawn, and evidence is advanced to prove that the light associated particles are indeed knock-on protons.

scholarly journals Development of a Real-Time, Large Area, High Spatial Resolution Particle Tracker Based on Scintillating Fibers

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
D. Lo Presti ◽  
D. L. Bonanno ◽  
F. Longhitano ◽  
C. Pugliatti ◽  
S. Aiello ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Real Time ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Charged Particles ◽  
Sensitive Area ◽  
Large Area ◽  
Main Design ◽  
Design Specifications ◽  
Scintillating Fibers

The design of a detector for tracking charged particles is presented together with the characterization techniques developed to extract the main design specifications. The goals for the final detector are to achieve real-time imaging performances, a large detection area, and a high spatial resolution, particularly suitable for medical imaging applications. This paper describes the prototype of the tracker plane, which has a 20 × 20 cm2sensitive area consisting of two crossed ribbons of 500 μm square scintillating fibers. The information about the hit position extracted real-time tracker in an innovative way, using a reduced number of the read-out channels to obtain a very large detection area but with moderate costs and complexity. The performances of the tracker have been investigated usingβsources, cosmic rays, and a 62 MeV proton beam.

scholarly journals Track Finding for the PANDA Detector Based on Hough Transformations

2021 ◽  
Vol 251 ◽  
pp. 04002
Author(s):  
Anna Alicke ◽  
Tobias Stockmanns ◽  
James Ritman
Keyword(s):  
Spatial Resolution ◽  
Optimization Methods ◽  
Secondary Particles ◽  
Panda Experiment ◽  
Straw Tube ◽  
Speed Optimization ◽  
And Performance ◽  
Under Construction ◽  
Further Development ◽  
Panda Detector

The PANDA experiment at FAIR (Facility for Antiproton and Ion Research) in Darmstadt is currently under construction. In order to reduce the amount of data collected during operation, it is essential to find as many true tracks as possible and to be able to distinguish them from false tracks. Part of the preparation for the experiment is the development of a fast online track finder. This work presents an online track finding algorithm based on Hough transformations, which is comparable in quality and performance to the currently best offline track finder in PANDA. In contrast to most track finders the algorithm can handle the challenge of extended hits delivered by PANDA’s central Straw Tube Tracker and thus benefit from its precise spatial resolution. Furthermore, optimization methods are presented that improved the ghost ratio as well as the speed of the algorithm by 70 %. Due to further development potential in terms of track finding for secondary particles and speed optimization on GPUs, this algorithm promises to exceed the quality and speed of other track finders developed for PANDA.

scholarly journals Track Reconstruction with PANDA at FAIR

2020 ◽  
Vol 245 ◽  
pp. 01029
Author(s):  
Michael Papenbrock ◽  
Walter Ikegami Andersson ◽  
Jenny Regina
Keyword(s):  
Spatial Information ◽  
Reconstruction Algorithms ◽  
Track Reconstruction ◽  
Proton Collisions ◽  
Panda Experiment ◽  
Straw Tube ◽  
Pattern Recognition Methods ◽  
Event Reconstruction ◽  
Wide Range ◽  
Time Stamps

The future PANDA experiment at FAIR aims to investigate a wide range of physics processes in antiproton-proton collisions at rates of up to 20 MHz, while employing a purely software-based event filter. To educate the trigger decisions, a full event reconstruction has to be carried out in real time. This challenge is amplified when considering tracks from particles with long lifetimes and displaced decay vertices, which add to the complexity of the reconstruction algorithms. Here, we present modifications to a cellular automatonbased track finder taking detector time-stamps into account in addition to spatial information, as well as several pattern recognition methods for longitudinal track reconstrucion with PANDA’s Straw Tube Tracker.

scholarly journals Track Models

2020 ◽  
pp. 49-80
Author(s):  
Rudolf Frühwirth ◽  
Are Strandlie
Keyword(s):  
Energy Loss ◽  
Equations Of Motion ◽  
Charged Particles ◽  
Inhomogeneous Magnetic Field ◽  
Thin Layers ◽  
Coulomb Scattering ◽  
Track Reconstruction ◽  
Normal Mixtures ◽  
Multiple Coulomb Scattering ◽  
Non Gaussian

AbstractThe chapter shows how the equations of motion for charged particles in a homogeneous or inhomogeneous magnetic field are solved. Various types of parametrizations are presented, and formulas for track propagation and error propagation are derived. As the effects of the detector material on the trajectory have to be taken into account, the statistical properties of multiple Coulomb scattering, energy loss by ionization, and energy loss by bremsstrahlung are discussed; then it is shown how the effects can be treated in the track reconstruction. As multiple scattering in thin layers and energy loss by bremsstrahlung have distinctive non-Gaussian features, an approximation by normal mixtures is presented.

ENERGY ORDERING EFFECTS IN THE ARRIVAL DIRECTIONS OF ULTRA-HIGH ENERGY COSMIC RAYS MEASURED BY THE PIERRE AUGER OBSERVATORY

2011 ◽  
Vol 20 (supp02) ◽  
pp. 50-56
Author(s):  
◽  
PETER SCHIFFER
Keyword(s):  
Cosmic Rays ◽  
Magnetic Fields ◽  
Charged Particles ◽  
High Energy ◽  
Pierre Auger Observatory ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Ordering Effects ◽  
Arrival Directions

The Pierre Auger Observatory is the world's largest experiment for the measurement of ultra-high energy cosmic rays (UHECRs). These UHECRs are assumed to be to be charged particles, and thus are deflected in cosmic magnetic fields. Recent results of the Pierre Auger Observatory addressing the complex of energy ordering of the UHECRs arrival directions are reviewed in this contribution. So far no significant energy ordering has been observed.

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