Zahlavi

Ústavní semináře

Ústavní semináře, obvykle vedené v anglickém jazyce, jsou vyhrazeny tématům, rozšiřujícím znalosti v oblastech zájmu jednotlivých oddělení: zejména jde o semináře významných hostů ÚJF AV ČR, referáty odborných skupin ÚJF a prezentace vynikajících výsledků. 

Příští semináře:

6. února 2025, 10:00, zasedací místnost ÚJF

  • Ing. Přemysl Beran, Ph.D.: ESS – a new type of spallation neutron source for scientific research

20. února 2025, 10:00, zasedací místnost ÚJF

  • RNDr. Jaroslav Zálešák, Ph.D.: Deep Underground Neutrino Experiment

Abstrakty:

ESS – a new type of spallation neutron source for scientific research
 
Ing. Přemysl Beran, Ph.D.
ONIM ÚJF
 
The European Spallation Source (ESS) is currently under construction in Lund, Sweden. When complete, it will provide a suite of 22 neutron beam instruments to the scientific user community, arranged around a spallation neutron target and moderator assembly, fed by a 5 MW proton accelerator. The facility, including all the instruments, is designed to provide world-leading performance, with new and unique instrumental capabilities providing the means to make progress and achieve breakthroughs across a broad spectrum of physical and biological sciences.
Unlike conventional pulsed spallation sources, where the proton pulse impacting the target is of the order of 1 μs in length, the ESS is designed to deliver significantly longer proton pulses. The ESS accelerator delivers a 2 GeV proton pulse of 2.86 ms in length, with a repetition rate of 14 Hz, impacting on a tungsten target in which fast neutrons are produced by spallation. These are then slowed down in a moderator reflector assembly, which will produce the world’s highest brightness of cold and thermal neutrons, using liquid parahydrogen and water, respectively.
The 15-instrument suite, considered for the start of the user program in 2027, consists of two small-angle instruments, two reflectometers, an imaging beamline, two single-crystal diffractometers; one for macromolecular crystallography and one for magnetism, two powder diffractometers, and an engineering diffractometer, as well as an array of five inelastic instruments comprising two chopper spectrometers, an inverse-geometry single-crystal excitations spectrometer, an instrument for vibrational spectroscopy and a high-resolution backscattering spectrometer.
The presentation will provide an overview of the ESS construction status, including the instrumentation and plans for the start of the user program.


Deep Underground Neutrino Experiment
 
RNDr. Jaroslav Zálešák, Ph.D.
Fyzikální ústav AV ČR
 
The Deep Underground Neutrino Experiment (DUNE) is a new generation of long baseline neutrino oscillation experiment. Its main goal is to determine the neutrino mass hierarchy and the phase violating CP invariance. The DUNE physics program also includes the detection of astrophysical neutrinos and the search for phenomena outside the standard model, such as proton decays. DUNE will consist of a near detector complex located at Fermilab, a few hundred meters downstream of the neutrino production site, and several 17-kton Liquid Argon Time Projection Chamber (LArTPC) far detector modules to be built at the Sanford Underground Research Facility (SURF), approximately 1.5 km underground and 1300 km away from the near detector. The detectors will be exposed to a broadband proton-generated neutrino beam of 1.2 MW in the first phase with a planned increase to 2.4 MW in the next phase. Two prototypes of the FD technology, the 700-ton LArTPC ProtoDUNE, have been operating at CERN for more than 2 years and have recently been optimized for new data acquisition in 2024-2025. This talk will present the scientific programme and recent progress of DUNE and its various prototypes. Finally, the Czech participation in the project will be discussed.

Archiv ústavních seminářů:

 

2024

 

2023

 

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Statutární zástupce: Ing. Ondřej Svoboda, Ph.D.  •  IČ: 61389005  •  DIČ: CZ61389005  •  Číslo účtu: 671958383/0300  •  Elektronická podatelna: ujf@ujf.cas.cz  •  ID datové schránky: t8xmzqw
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