Uniwersytet Warszawski
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 1 marca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Uczenie maszynowe w fizyce”
Referuje: dr hab. Artur Kalinowski, prof.UW (IFD UW)
W czasie seminarium przypomnę podstawowe pojęcia z dziedziny uczenia maszynowego, następnie przytoczę losowe przykłady jego zastosowania w różnych działach fizyki.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 2 lutego (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Image-guided FLASH Proton Therapy”
Referuje: Karol Lang, University of Texas at Austin
Image-guidance and dosimetry of the in-vivo proton range verification is one of the most underinvested aspects of radiation cancer treatment. The scarcity of sensitive instruments and treatment protocols for precision monitoring of effects of beam radiation leaves much room for improvement. This is despite that such measurements may dramatically enhance the treatment accuracy and lower the post-exposure toxicity, improving the entire outcome of cancer therapy.
In this talk, we will discuss designing and building of an in-beam time-of-flight positron-emission-tomography (PET) scanner to be tested in pre-clinical studies at Proton Therapy Center of MD Anderson Cancer Center in Houston. We will also discuss selected results of recent experiments with FLASH proton beam irradiations of phantoms and other related ideas towards improving and expanding the use of PET detectors, including the total body imaging. This endeavor has been made possible by the support of the U. of Texas – Portugal program at the University of Texas at Austin.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 26 stycznia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Light-by-light scattering and dilepton production in ultra-peripheral heavy-ion collisions with ATLAS”
Referuje: dr Krzysztof Cieśla (AGH)
The presence of a large flux of photons accompanying relativistic heavy ion beams leads to a significant number of photon-induced processes, including photon-photon fusion. These processes are remarkably clean with little or no remnant activity from the interacting particles. I will present the status of photon-photon fusion measurements resulting in either two photons (γγ→γγ) or two charged leptons (γγ→l+l−) in the final state, measured by the ATLAS experiment in ultra-peripheral heavy-ion collisions.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 19 stycznia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Status of the Dose-3D Project”
Referuje: prof. Tomasz Szumlak (AGH)
The dose-3D project aims to provide a next-generation active phantom for rapid measurement of the deposited dose in photon therapy. During the initial development period, a dedicated, modular, and flexible DAQ system was designed and constructed along with a number of prototypes.
The design of the detector configurable matrix was especially challenging. An extensive search for the best scintillating active material and suitable mechanical part provided the required robust support and sufficiently small material budget. We decided to use 3D printing technology for the final prototypes to produce both the scintillating voxels and mechanical parts. Also, considerable effort was dedicated to designing and implementing an interface between the optical fibre and the scintillating voxel. In this talk, I will give the current status of the project and prospects for future developments and commercialisation prospects.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 15 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„KM3NeT experiment: overview and recent results”
Referuje: mgr inż. Piotr Kalaczyński (AstroCeNT)
Although intensively studied in the last decades, neutrinos still hold a number of mysteries. KM3NeT is a project aiming to uncover these. The KM3NeT experiment consists of two underwater Cherenkov neutrino telescopes, currently under construction at two different locations in the Mediterranean Sea. The KM3NeT detectors collect vast amounts of data already in their intermediate configurations. This includes sufficient number of atmospheric neutrinos to observe neutrino oscillations and perform first astrophysical neutrino searches. This talk describes the KM3NeT detectors and their basic physics programme, including results obtained with data from the early detector configurations.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 8 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Jack Steinberger (1920-2020) – in memoriam on the third anniversary of his death.”
Referuje: prof. dr hab. Jan Królikowski (IFD,UW)
Jack Hans Steinberger (1921- 2020) was an outstanding experimental particle physicist. Among his discoveries/ measurements are proof of the three-body decay of a muon (PhD 1949 ), the discovery of the π0 meson, practical implementation of the bubble chambers as a tool for accelerator physics (BNL 195-1963), experimental discovery of the difference between muon and electron neutrinos (Nobel Prize 1988 with L.
Lederman and M. Schwarz), a plethora of precise measurements of the mixing and CPV in the neutral kaon system (Columbia and CERN), precise measurements of neutrino interactions with iron. (CDHS(W) experiment), ALEPH experiment at LEP.
I worked with Jack in the CHSW neutrino experiment during the 1979-1989 decade. I learned from him a lot. At the third anniversary of His death, I would like to give a commemorative talk discussing His experimental heritage, focusing on the not so well known earlier results.
dr hab. Katarzyna Grzelak
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 1 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Neutrino oscillations – review of current experimental results”
Referuje: dr hab. Justyna Łagoda, prof NCBJ
The existence of neutrino oscillations was confirmed 25 years ago.
Since that time, a lot of experiments have been performed with different sources of neutrinos and detection techniques.
Now, we know the values of the neutrino mixing angles with quite good precision, yet there are still questions to be answered, such as the neutrino mass ordering, CP-violation in the neutrino sector, or the existence of sterile neutrinos. The presentation is an extended and updated talk given at the EPS HEP 2023 conference and will summarize the current knowledge of neutrino oscillations and present recent results from selected experiments as well as some perspectives for the future.
dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 24 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„The LUXE – Laser und XFEL Experiment – Report from the “LUXE physics and SFQED workshop” and LUXE Collaboration Meeting”
Referuje: dr hab. Grzegorz Grzelak (IFD,UW)
In the seminar I will present the progress in the preparation of the LUXE experiment after publishing in 2023 the TDR:
Technical Design Report.
LUXE is an experiment currently being developed at DESY in Hamburg, that aims to use the high-quality electron beam of the European XFEL facility and a high-power optical laser.
The scientific goal of the experiment is to study quantum electrodynamics in the largely unexplored territory, in the regime of strong fields (SFQED), close to and beyond the Schwinger limit, revealing the non-perturbative face of QED.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 17 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„Heavy flavour physics 2.0 (LHCb Upgrades)”
Referuje: dr hab. Agnieszka Obłąkowska-Mucha, prof AGH (AGH)
LHCb has undergone a major upgrade during LHC LS2 (2019-2022) to cope with increased instantaneous luminosities, a full software-based trigger, and real-time analysis. This talk will include the very fresh LHCb results, the performance of the real-time readout system, and plans for the long-lived particle reconstruction. Further upgrades and reconstruction challenges for LHC Run 4 and 5 will also be discussed.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki
SEMINARIUM FIZYKI WIELKICH ENERGII
Dnia 10 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:
„The Level-1 muon trigger of the CMS experiment”
Referuje: dr hab. Marcin Konecki, prof. UW (IFD UW)
The event selection in the CMS experiment is necessary to reduce the LHC event rate down to O(1kHz) suitable for event storage.
This selection is done by the two stage trigger. The CMS level-1 muon trigger, is custom-hardware device, processing signals from CMS muon detectors.
In the presentation the evolution and the performance of the Level-1 muon trigger system is discussed.
The perspectives for upgrade for LHC Phase-II are given.
The activities of Warsaw Group, responsible for the trigger operation in a barrel-endcap overlap of the CMS detector, are emphasized.
Serdecznie zapraszamy
dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki