A5040552669- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Computational Physics and Python Applications
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Quantum Information and Cryptography
- Advanced Optical Sensing Technologies
- Black Holes and Theoretical Physics
- Radiation Effects in Electronics
- Nuclear Physics and Applications
- Laser-Matter Interactions and Applications
- Nuclear physics research studies
- Magnetic confinement fusion research
- Mechanical and Optical Resonators
- Superconducting Materials and Applications
- 3D IC and TSV technologies
- Medical Imaging Techniques and Applications
- Quantum Mechanics and Applications
- Analytical Chemistry and Sensors
Czech Technical University in Prague
2017-2025
European Organization for Nuclear Research
2021-2024
University of Manchester
2019-2024
University of Geneva
2024
Conpart (Norway)
2024
Laboratoire de Physique Nucléaire et de Hautes Énergies
2024
Ferioli & Gianotti (Italy)
2024
European Science Foundation
2024
University of Oxford
2023
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2022
We demonstrate a coincidence velocity map imaging apparatus equipped with novel time-stamping fast optical camera, Tpx3Cam, whose high sensitivity and nanosecond timing resolution allow for simultaneous position time-of-flight detection. This single detector design is simple, flexible, capable of highly differential measurements. show detailed characterization the camera its application in strong field ionization experiments.
The ALICE ITS3 (Inner Tracking System 3) upgrade project and the CERN EP R&D on monolithic pixel sensors are investigating feasibility of Tower Partners Semiconductor Co. 65 nm process for use in next generation vertex detectors. aims to employ wafer-scale Monolithic Active Pixel Sensors thinned down 20–40 µm bent form truly cylindrical half barrels. Among first critical steps towards realisation this detector is validate sensor technology through extensive characterisation both laboratory...
In this work we investigate quantum-enhanced target detection in the presence of large background noise using multidimensional quantum correlations between photon pairs generated through spontaneous parametric down-conversion. Until now similar experiments have only utilized one pairs' many degrees freedom such as temporal and number correlations. Here, both spectral achieved over an order magnitude reduction to turn significant data acquisition time when compared utilizing modes. We believe...
Abstract Scalable technologies to characterize the performance of quantum devices are crucial creating large networks and processing units. Chief among resources information is entanglement. Here we describe full temporal spatial characterization polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters with minimal technical...
The Hanbury Brown–Twiss (HBT) effect holds a pivotal place in intensity interferometry and gave seminal contribution to the development of quantum optics. To observe such an effect, both good spectral timing resolutions are necessary. Most often, HBT is observed for single frequency at time due its limitations dealing with multifrequencies simultaneously, halting limiting some applications. Here, we report fast data-driven spectrometer built one-dimensional array single-photon-sensitive...
The role of the COMPASS tokamak in research generation, confinement and losses runaway electron (RE) population is presented. Recently, two major groups experiments aimed at improved understanding control REs have been pursued. First, effects massive gas injection ( Ar/Ne particles) impurity seeding were studied systematically. observed phenomena include generation post-disruption RE beam current conversion from plasma to RE. Zero loop voltage was implemented order study decay simplified...
In this paper, direct observation of micromotion for multiple ions in a laser-cooled trapped ion crystal is discussed along with measurement technique amplitude. Micromotion directly observed using time-resolving, single-photon-sensitive camera that provides both fluorescence and position data each on the nanosecond time scale. amplitude phase are measured, allowing method to be sensitive tilts shifts chain from null radio-frequency quadrupole potential linear trap. Spatial resolution makes...
We describe a fast data-driven optical camera, Tpx3Cam, with nanosecond scale timing resolution and 80 Mpixel/sec throughput. After the addition of intensifier, camera is single photon sensitive quantum efficiency determined primarily by intensifier photocathode. The performance was characterized results on gain, afterpulsing reported here. intensified successfully used for measurements in variety applications including applications. As an example such application, which requires...
High-dimensional entanglement is a promising resource for quantum technologies. Being able to certify it any state essential. However, date, experimental certification methods are imperfect and leave some loopholes open. Using single-photon sensitive time-stamping camera, we quantify high-dimensional spatial by collecting all output modes without background subtraction, two critical steps on the route towards assumptions-free certification. We show position-momentum Einstein-Podolsky-Rosen...
The ARIADNE project is developing innovative optical readout technologies for two-phase liquid Argon time projection chambers (LArTPCs). Optical presents an exciting alternative to the current paradigm of charge readout. simple, scalable and cost effective. This paper first demonstration 3D TPC, using CF4 gas as a proof principle. Both cosmic rays Americium-241 alpha source have been imaged in 100 mbar CF4. A single-photon sensitive camera was developed by combining Timepix3 (TPX3) based...
The properties of a novel ultra-fast optical imager, Tpx3Cam, were investigated for macroscopic wide-field phosphorescent lifetime imaging (PLIM) applications. camera is based on sensor and Timepix3 readout chip with time resolution 1.6 ns, recording photon arrival over threshold each pixel, rate 80 megapixels per second. In this study, we coupled the to an image intensifier, 760 nm emission filter 50 mm lens, super-bright 627nm LED providing pulsed excitation 18 × sample area. resulting...
A camera-based three-dimensional (3D) imaging system with a superb time-of-flight (TOF) resolution and multi-hit capability was recently developed for electron/ion [Lee et al. J. Chem. Phys. 141, 221101 (2014)]. In this work, we report further improvement of the event rate by adopting an event-driven camera, Tpx3Cam, detecting 2D positions electrons, while high-speed digitizer provides highly accurate (∼30 ps) TOF information each at approaching 1 Mhits/sec.
The angle-dependent single ionization of carbon dioxide by linearly and circularly polarized pulses is investigated experimentally. authors show that delay-dependent ion-momentum measurements from rotational wave packets can be used to test the validity axial recoil approximation.
The uses of a silicon-pixel camera with very good time resolution (∼nanosecond) for detecting multiple, bunched optical photons is explored. We present characteristics the and describe experiments proving its counting capabilities. use spontaneous parametric down-conversion source to generate correlated photon pairs, exploit Hong-Ou-Mandel (HOM) interference effect in fiber-coupled beam splitter bunch pair onto same output fiber. It shown that spatial enables independent detection two...
The LHCb VELO Upgrade I, currently being installed for the 2022 start of LHC Run 3, uses silicon microchannel coolers with internally circulating bi-phase \cotwo thermal control hybrid pixel modules operating in vacuum. This is largest scale application this technology to date. Production was completed July 2019 and assembly into cooling structures September 2021. paper describes R\&D path supporting production motivation design choices. have excellent peformance, low uniform mass, no...
This paper presents the design of a front-end circuit for monolithic active pixel sensors. The operates with sensor featuring small, low-capacitance (< 2 fF) collection electrode and is integrated in DPTS chip, proof-of-principle prototype 1.5 mm × including matrix 32 pixels pitch 15 μm. chip implemented 65 nm imaging technology from Tower Partners Semiconductor Co. foundry was developed framework EP-R&D program at CERN to explore this particle detection. has an area 42 μm <sup...
This paper presents two scenarios used for generation of a runaway electron (RE) beam in the COMPASS tokamak with focus on decay phase and control beam. The first scenario consists massive gas injection argon into current ramp-up phase, leading to disruption accompanied by plateau generation. In second scenario, smaller amount is order isolate RE from high-temperature plasma. performances radial vertical position feedback were experimentally studied analysed. role energy stability seems be...
We describe the full temporal and spatial characterization of polarization-entangled photons produced by Spontaneous Parametric Down Conversions using an intensified high-speed optical camera, Tpx3Cam. This novel technique allows for precise determination Bell inequality parameters new methods distribution entangled quantum information. also discuss a to synchronize multiple cameras separated vast distances, which will be required distributed network.
We describe a simple multivariate technique of likelihood ratios for improved discrimination signal and background in multi-dimensional quantum target detection. The combines two independent variables, time difference summed energy, photon pair from the spontaneous parametric down-conversion source into an optimal discriminant. discriminant performance was studied experimental data Monte-Carlo modelling with clear improvement shown compared to previous techniques. As novel detectors become...
Qubit state detection is an important part of a quantum computation. As number qubits in register increases, it necessary to maintain high fidelity accurately measure the multi-qubit state. Here we present experimental demonstration high-fidelity trapped ion with average single qubit error 4.2(1.5) ppm and 4-qubit 17(2) ppm, limited by decay lifetime qubit, using novel single-photon-sensitive camera fast data collection, excellent temporal spatial resolution, low instrumental crosstalk.
In this work, we present a prototype of the Monolithic Active Pixel Sensor (MAPS) called X-CHIP-02 designed in 180 nm SOI CMOS technology. The selected technology has attractive features for fabrication X-ray imaging sensors: 100 Ω⋅ cm handle wafer resistivity, thick epitaxial layer to suppress back-gate effect, support high voltage devices and deep trench isolation. two pixel matrices with pitch 50 μm integrated 8-bit photon counting circuitry. Fine monolithic pixels imply small capacitance...
O2 PLIM microscopy was employed in various studies, however current platforms have limitations sensitivity, image acquisition speed, accuracy and general usability. We describe a new imager based on the Timepix3 camera (Tpx3cam) its application for imaging of concentration tissue samples stained with nanoparticle probe, NanO2-IR. Upon passive staining mouse brain, lung or intestinal surface minute quantities NanO2-IR by microinjecting probe into lumen small large intestine fragments, robust...
It has been recently suggested that optical interferometers may not require a phase-stable link between the stations if instead sources of quantum-mechanically entangled pairs could be provided to them, enabling extra- long baselines and benefiting numerous topics in astrophysics cosmology. We developed new variation this idea, proposing two photons from different interfered at decoupled stations, requiring only slow classical information them. show approach allow high- precision...
Abstract The LHCb detector has undergone a major upgrade for LHC Run 3. This Upgrade I facilitates operation at higher luminosity and utilises full-detector information the collision rate, critically including use of vertex information. A new locator system, VELO Upgrade, been constructed. core element are double-sided pixelated hybrid silicon modules which operate in vacuum close to beam high radiation environment. construction quality assurance tests these described this paper. incorporate...
The Hanbury Brown-Twiss (HBT) effect holds a pivotal place in intensity interferometry and gave seminal contribution to the development of quantum optics. To observe such an effect, both good spectral timing resolutions are necessary. Most often, HBT is observed for single frequency at time, due limitations dealing with multifrequencies simultaneously, halting limiting some applications. Here, we report fast data-driven spectrometer built one-dimensional array single-photon-sensitive...