A5081673135- Particle Detector Development and Performance
- Spacecraft Design and Technology
- Astrophysical Phenomena and Observations
- Radiation Effects in Electronics
- Advanced X-ray Imaging Techniques
- CCD and CMOS Imaging Sensors
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Advanced X-ray and CT Imaging
- Astronomical Observations and Instrumentation
- Medical Imaging Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Spacecraft and Cryogenic Technologies
- Radiation Therapy and Dosimetry
- Astrophysics and Cosmic Phenomena
- Radiomics and Machine Learning in Medical Imaging
- Adaptive optics and wavefront sensing
- Sensor Technology and Measurement Systems
- Optical Systems and Laser Technology
- Advanced MEMS and NEMS Technologies
- Radiology practices and education
- Dark Matter and Cosmic Phenomena
- Advanced Optical Sensing Technologies
Czech Technical University in Prague
2016-2023
Pennsylvania State University
2017
We present the application of a Timepix detector on VZLUSAT-1 nanosatellite. is compact pixel (256×256 square pixels, 55×55 μm each) sensitive to hard X-ray radiation. It suitable for detecting extraterrestrial X-rays due its low noise characteristics, which enables measuring without special cooling. This project aims verify practicality in conjunction with 1-D Lobster-Eye optics observe celestial sources between 5 and 20 keV. A modified USB interface (developed by IEAP at CTU Prague) used...
The Timepix3 readout ASIC chip is a hybrid pixelated radiation detector, designed at CERN, which contains 256 px × matrix. Each of the 65,536 radiation-sensitive pixels can record an incoming particle, its energy deposition or time arrival and measure them simultaneously. Since detector suitable for wide range applications from particle physics, national security medicine to space science, it be used in temperatures. Until now, has calibrated every operating point application. This paper...
The VZLUSAT-1 satellite, the first Czech CubeSat, was successfully launched on June 23, 2017, to a 510 km Sun-synchronous low-Earth orbit. It carries several scientific payloads including Timepix detector as focal plane imager for X-Ray telescope onboard. contributes significantly satellite data collection, with more than 25 000 sampling acquisitions in year of deployment. Despite limitations attitude control system, necessary capturing images Sun, allows measuring space radiation...
The CubeSat mission with the demonstrator of miniaturized X-ray telescope is presented. paper presents one objectives using instrument for remote sensing Terrestrial Gamma-ray Flashes (TGFs). TGFs are intense sources gamma-rays associated lightning bolt activity and tropical thunderstorms. measurement exists was measured by sounding rockets, high altitude balloons or several satellite missions. Past missions were equipped different detectors working from 10 keV up to MeV. RHESSI spectrum...
This paper presents a Lobster Eye (LE) X-ray telescope developed for the Water Recovery Rocket (WRX-R) experiment. The primary payload of rocket experiment is soft spectroscope by Pennsylvania State University (PSU), USA. Czech team participates hard LE as secondary payload. astrophysical objective Vela Supernova size about 8deg x 8deg. In center nebula neutron star with strong magnetic field, roughly mass Sun and diameter 20 kilometers forming pulsar. WRX-R spectral measurement outer part...
CubeSats are a good opportunity to test new technologies and materials on orbit. These innovations can be later used for improving of properties life length Cubesat or other satellites as well. VZLUSAT-1 is small satellite from the CubeSat family, which will carry wide scale payloads with different purposes. The poster focused measuring degradation measurement radiation hardened composite material in orbit due space environment. Material changes studied by many methods disciplines. One...
The Timepix3 is a hybrid pixellated radiation detector consisting of 256 px × radiation-sensitive matrix. Research has shown that it susceptible to energy spectrum distortion due temperature variations. This can lead relative measurement error up 35% in the tested range 10 °C 70 °C. To overcome this issue, study proposes complex compensation method reduce less than 1%. was with different sources, focusing on peaks 100 keV. results showed general model for could be established, where X-ray...
In the field of astronomical X-ray telescopes, different types optics based on grazing incidence mirrors can be used. This contribution describes special design a lobster-eye in Schmidt's arrangement, which uses dual reflection to increase collecting area. The individual this wide-field telescope are made at silicon wafers coated with reflecting iridium layers. coatings have some advantages compared more common gold layers as is shown corresponding simulations. coating process for was...
The paper summarizes the Rocket EXperiment (REX) Lobster Eye (LE) X-ray Telescope payload results. experiment was performed by PennState University with spectroscope on board a Water Recovery X-Ray (WRXR) launched 4th April, 2018. secondary REX LE Telescope. telescope consists of two telescopes one-dimensional (1D) and two-dimensional (2D) optics, visible-light camera an IR grid-eye. primary structure metal housing for optics carbon fiber baffle Timepix sensors mounted at end. observation...
The health monitoring (HM) system placed on VZLUSAT‐1 nondestructively measures the mechanical and thermal properties of newly developed carbon fiber material for space usage. is exposed to vacuum, radiation, temperature changes in space. It can be used as a substitute currently aluminum alloys because it has lower mass density better compared aluminum. HM payload evaluates quality according difference Young's modulus. modulus elasticity characteristic property every solid material, measured...
Lobster eye X-ray optics in the one dimensional (1D) arrangement has advantages higher reflectivity, especially for energies, compared to classical two (2D) Schmidt's arrangement.One can determine only direction of incoming beam.There is placed a strip front determining second direction.This made proof material which blocks beam and thus causes gap line.Based on these facts, it possible position each point source enough signal ratio.Unfortunately, intensity sources not assess by this method.
The thermal dependence of semiconductor detectors is one their critical properties. This paper presents the results Timepix3 detector vacuum testing, with respect to effects on its properties and sensitivity. represents a new generation Timepix chips Medipix family, it equipped an event-based mode detection allowing for simultaneous measurement position, time energy incident particle. Due properties, are very suitable space applications. Given that this relatively device, influence...
Abstract Collimation of x-rays is challenging, especially for a wide range grazing-incidence angles. One the promising x-ray optics can be wide-field Lobster-Eye (LE) in Schmidt’s arrangement, which raised interest recent years, and will considered simulations description perspective space missions. This paper introduces newly developed simulator, PyXLA, written Python evaluates simulates specific types reflective optics, particularly LE optics. The software utilises fundamental ray-tracing...
Wolter I optics are commonly used for imaging in X-Ray spectrum. This system uses two reflections, and at higher energies, this is not so much efficient but has a very good optical resolution. Here another type of Lobster Eye, which using also reflections focusing rays Schmidt's or Angel's arrangement. possible to use eye as one dimensional independent optics. paper describes advantages Eye arrangement its data processing - find out number sources wide field view. Two (2D) suitable detect...
The Timepix3 is a hybrid pixel radiation detector with an array of 65,536 sensitive pixels capable operating in one three available modes: Counting mode, Time-over-Threshold (ToT) and Time-of-Arrival (ToA) mode. It the successor Timepix chip developed at CERN combines measuring various sensor materials different thicknesses. Because capability simultaneous measurement ToT ToA variability used sensor, this type suitable for wide range applications from particle physics, X-ray imaging over...
The first results of an outgassing monitor on board the Czech CubeSat launched into Earth's orbit are presented in this paper. VZLUSAT‐1 was June 2017 as a technological satellite and is still operating LEO orbit. A newly developed carbon‐fiber‐reinforced plastic, which can be used radiation shield, one tested items board. amount its critical properties for space applications. Water vapor largest part matter outgassed from mounted composites other components. Thus novel monitoring device...
The technological CubeSat VZLUSAT‐1 was launched in June 2017, and carries a number of scientific commercial experiments aboard. Several them are focused on in‐orbit investigation novel carbon‐fiber composite developed by the 5 M company; examination residual liquid evaporation, change eigenfrequencies material due to aging, shielding abilities against cosmic radiation. quality is evaluated from comparative measurement between three channels with different shielding. Each channel contains...