Search results

1

Active Suspension Based on Low Dynamic Stiffness

100%

Snamina J., Kowal J., Orkisz P.

|

2013

|

vol. 123

|

issue 6

1118-1122

EN

The paper presents an active vibration control system based on low dynamic stiffness of suspension. Using a simple two degrees-of-freedom system a few basic concepts of lowering suspension dynamic stiffness are presented. Through reducing the dynamic component of force between the protected subsystem and remaining part of the system, considerable vibration suppression is achieved. Linear and nonlinear algorithms are proposed. In the case of nonlinear control algorithm, the sufficient link between the protected subsystem and the remaining part of the system necessary to change the position of the protected subsystem is maintained. Experiments described in the paper cover two different cases. In the first case, the suspension operated as the passive suspension, while in the second case, the active reduction system was included. The results are presented graphically.

2

Quantitative and Qualitative Methods for Evaluation of Measurement Signals on the Example of Vibration Signals Analysis from the Corps of Prototype Reclaimer Regmas

100%

Kowal J., Dańko J., Stojek J.

Archives of Metallurgy and Materials

|

2013

|

issue 3

3

Multiple Scattering and Accidental Coincidences in the J-PET Detector Simulated Using GATE Package

34%

Kowalski P., Moskal P., Wiślicki W., Raczyński L., Bednarski T., Białas P., Bułka J., Czerwiński E., Gajos A., Gruntowski A., Kamińska D., Kapłon Ł., Kochanowski A., Korcyl G., Kowal J., Kozik T., Krzemień W., Kubicz E., Niedźwiecki S., Pałka M., Rudy Z., Salabura P., Sharma N., Silarski M., Słomski A., Smyrski J., Strzelecki A., Wieczorek A., Wochlik I., Zieliński M., Zoń N.

Acta Physica Polonica A

|

2015

|

vol. 127

|

issue 5

1505-1512

EN

Novel positron emission tomography system, based on plastic scintillators, is developed by the J-PET collaboration. In order to optimize geometrical configuration of built device, advanced computer simulations are performed. Detailed study is presented of background given by accidental coincidences and multiple scattering of gamma quanta.

4

GPU Accelerated Image Reconstruction in a Two-Strip J-PET Tomograph

34%

Białas P., Kowal J., Strzelecki A., Bednarski T., Czerwiński E., Gajos A., Kamińska D., Kapłon Ł., Kochanowski A., Korcyl G., Kowalski P., Kozik T., Krzemień W., Kubicz E., Moskal P., Niedźwiecki S., Pałka M., Raczyński L., Rudy Z., Rundel O., Salabura P., Sharma N., Silarski M., Słomski A., Smyrski J., Wieczorek A., Wiślicki W., Zieliński M., Zoń N.

Acta Physica Polonica A

|

2015

|

vol. 127

|

issue 5

1500-1504

EN

We present a fast GPU implementation of the image reconstruction routine, for a novel two strip PET detector that relies solely on the time of flight measurements.

5

A Pilot Study of the Novel J-PET Plastic Scintillator with 2-(4-styrylphenyl)benzoxazole as a Wavelength Shifter

34%

Wieczorek A., Moskal P., Niedźwiecki S., Bednarski T., Białas P., Czerwiński E., Danel A., Gajos A., Gruntowski A., Kamińska D., Kapłon Ł., Kochanowski A., Korcyl G., Kowal J., Kowalski P., Kozik T., Krzemień W., Kubicz E., Molenda M., Pałka M., Raczyński L., Rudy Z., Rundel O., Salabura P., Sharma N., Silarski M., Słomski A., Smyrski J., Strzelecki A., Uchacz T., Wiślicki W., Zieliński M., Zoń N.

Acta Physica Polonica A

|

2015

|

vol. 127

|

issue 5

1487-1490

EN

For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as a scintillator dopant acting as a wavelength shifter. In this article a light yield of the plastic scintillator, prepared from styrene doped with 2 wt% of 2,5-diphenylbenzoxazole and 0.03 wt% of 2-(4-styrylphenyl)benzoxazole, is determined to be as large as 60% ± 2% of the anthracene light output. There is a potential to improve this value in the future by the optimization of the additives concentrations.

6

Analysis Framework for the J-PET Scanner

34%

Krzemień W., Gajos A., Gruntowski A., Stola K., Trybek D., Bednarski T., Białas P., Czerwiński E., Kamińska D., Kapłon Ł., Kochanowski A., Korcyl G., Kowal J., Kowalski P., Kozik T., Kubicz E., Moskal P., Niedźwiecki S., Pałka M., Raczyński L., Rudy Z., Salabura P., Sharma N., Silarski M., Słomski A., Smyrski J., Strzelecki A., Wieczorek A., Wiślicki W., Zieliński M., Zoń N.

Acta Physica Polonica A

|

2015

|

vol. 127

|

issue 5

1491-1494

EN

J-PET analysis framework is a flexible, lightweight, ROOT-based software package which provides the tools to develop reconstruction and calibration procedures for PET tomography. In this article we present the implementation of the full data-processing chain in the J-PET framework which is used for the data analysis of the J-PET tomography scanner. The framework incorporates automated handling of PET setup parameters' database as well as high level tools for building data reconstruction procedures. Each of these components is briefly discussed.

7

Hit Time and Hit Position Reconstruction in the J-PET Detector Based on a Library of Averaged Model Signals

34%

Moskal P., Sharma N., Silarski M., Bednarski T., Białas P., Bułka J., Czerwiński E., Gajos A., Kamińska D., Kapłon L., Kochanowski A., Korcyl G., Kowal J., Kowalski P., Kozik T., Krzemień W., Kubicz E., Niedźwiecki S., Pałka M., Raczyński L., Rudy Z., Rundel O., Salabura P., Słomski A., Smyrski J., Strzelecki A., Wieczorek A., Wiślicki W., Wochlik I., Zieliński M., Zoń N.

Acta Physica Polonica A

|

2015

|

vol. 127

|

issue 5

1495-1499

EN

In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors amplitude and shape of registered signals depend strongly on the position where particle hits the detector. The reconstruction is based on determination of the degree of similarity between measured and averaged signals stored in a library for a set of well-defined positions along the scintillator. Preliminary results of validation of the introduced method with experimental data obtained by means of the double strip prototype of the J-PET detector are presented.

Refine search results

Active Suspension Based on Low Dynamic Stiffness

Quantitative and Qualitative Methods for Evaluation of Measurement Signals on the Example of Vibration Signals Analysis from the Corps of Prototype Reclaimer Regmas

Multiple Scattering and Accidental Coincidences in the J-PET Detector Simulated Using GATE Package

GPU Accelerated Image Reconstruction in a Two-Strip J-PET Tomograph

A Pilot Study of the Novel J-PET Plastic Scintillator with 2-(4-styrylphenyl)benzoxazole as a Wavelength Shifter

Analysis Framework for the J-PET Scanner

Hit Time and Hit Position Reconstruction in the J-PET Detector Based on a Library of Averaged Model Signals