Joint Institute for Nuclear Research
Adjustment and Preparation for Commissioning of the Electron Linear Accelerator LINAC-200
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- Category: News
At DLNP, the adjustment and commissioning work is well under way at LINAC-200, the first stage of the electron linear accelerator LINAC-800. The accelerator is intended for carrying out methodological investigations of detectors developed at JINR, solving applied problems with the use of electron beams, and implementing educational programmes of the JINR University Centre. The accelerator will produce electron beams with energies of 10 MeV to 200 MeV in a wide intensity range.
“Development and Application of Methods for Studying Photodetectors” by Nikolay Anfimov
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- Category: Seminars
Photodetectors with internal amplification such as vacuum photomultiplier tubes (PMTs), silicone photomultipliers (SiPMs) and avalanche photodiodes (APDs) play a significant role in advancement of science and technology. They are used in up-to-date medical equipment—positron emission tomographs (PETs) and gamma chambers; in cargo and luggage control systems—scanners and introscopes; in laser location and lidars, and in many other areas.
In modern experimental nuclear physics, photodetectors of this kind are used in scintillation counters, time-of-flight systems, scintillation homogeneous and heterogeneous calorimeters, Cherenkov detectors, trackers, large-scale liquid scintillator detectors and water Cherenkov detectors employed for neutrino physics and other purposes.
Eighth Lecture by Igor Ivanov “Zeptoseconds and yoctoseconds” from the Series “Time Scales: Travelling Deep into the Second with Historical Sketches”
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Nuclear time scale. Lifetime of isotopes. Crystal blocking technique. Collision of relativistic nuclei.
A New Method for Measurement of Low Neutron Fluxes using Iodine-Containing Scintillators
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One of the most important objectives pursued in low-background experiments on the search for rare events is the study and continuous monitoring of neutron fluxes in the vicinity of the detection setup. The problem is that neutron fluxes in low-background experiments are thousands of times lower than on the ground. The gold standard for neutron flux measurement is the 3He-based counter due to a large cross section for thermal neutron capture (5333 b) and extremely low sensitivity of these counters to the gamma background. Unfortunately, there are no commercial 3He sources: its content in natural helium is only 0.000137%. All the available amount of 3He is produced at nuclear reactors, and its cost is more than $2000 per litre.
Seventh Lecture by Igor Ivanov “The atom from inside” from the Series “Time Scales: Travelling Deep into the Second with Historical Sketches”
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Innermost electrons. Tools of attophysics. Excited atoms.
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