BONNER CYLINDER SET FOR NEUTRON SPECTROSCOPY AT HIGH ENERGY ACCELERATORS

2019 ◽  
Vol 187 (1) ◽  
pp. 77-82
Author(s):  
Alexey Sokolov ◽  
Ekaterina Kozlova ◽  
Torsten Radon
Keyword(s):  
Short Pulse ◽  
High Energy ◽  
Wide Energy Range ◽  
Particle Accelerators ◽  
Neutron Spectroscopy ◽  
Construction Costs ◽  
Bonner Sphere ◽  
Wide Energy ◽  
Ultra Short Pulse ◽  
Dose Measurements

Abstract At particle accelerators, the knowledge of neutron spectra is important for radiation protection to improve the accuracy of dose measurements, for activation and radiation damage studies. Classical Bonner sphere spectrometer is a common reliable tool for this kind of measurements. Here we present a new set of cylinders with TLD cards as a sensitive element to be used for neutron spectroscopy in a wide energy range for continuous and ultra-short pulse radiation. A simple layout, relatively small dimensions and weight, as well as implementation of common materials providing low construction costs make the set useful for spectroscopic purposes. The unfolding results for various simulated radiation scenarios are also presented.

scholarly journals Petawatt Femtosecond Laser Pulses from Titanium-Doped Sapphire Crystal

Crystals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 783
Author(s):  
Hiromitsu Kiriyama ◽  
Alexander S. Pirozhkov ◽  
Mamiko Nishiuchi ◽  
Yuji Fukuda ◽  
Akito Sagisaka ◽  
...  
Keyword(s):  
High Intensity ◽  
Short Pulse ◽  
Beam Quality ◽  
Laser Pulses ◽  
High Energy ◽  
Femtosecond Laser Pulses ◽  
Small Scale ◽  
Sapphire Crystal ◽  
Chirped Pulse Amplification ◽  
Ultra Short Pulse

Ultra-high intensity femtosecond lasers have now become excellent scientific tools for the study of extreme material states in small-scale laboratory settings. The invention of chirped-pulse amplification (CPA) combined with titanium-doped sapphire (Ti:sapphire) crystals have enabled realization of such lasers. The pursuit of ultra-high intensity science and applications is driving worldwide development of new capabilities. A petawatt (PW = 1015 W), femtosecond (fs = 10−15 s), repetitive (0.1 Hz), high beam quality J-KAREN-P (Japan Kansai Advanced Relativistic ENgineering Petawatt) Ti:sapphire CPA laser has been recently constructed and used for accelerating charged particles (ions and electrons) and generating coherent and incoherent ultra-short-pulse, high-energy photon (X-ray) radiation. Ultra-high intensities of 1022 W/cm2 with high temporal contrast of 10−12 and a minimal number of pre-pulses on target has been demonstrated with the J-KAREN-P laser. Here, worldwide ultra-high intensity laser development is summarized, the output performance and spatiotemporal quality improvement of the J-KAREN-P laser are described, and some experimental results are briefly introduced.

scholarly journals The theoretical study and numerical simulation of self-similar transmission of high energy wave-breaking　free ultra-short pulse

2007 ◽  
Vol 56 (5) ◽  
pp. 2769
Author(s):  
Lei Ting ◽  
Tu Cheng-Hou ◽  
Li En-Bang ◽  
Li Yong-Nan ◽  
Guo Wen-Gang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Wave Breaking ◽  
Theoretical Study ◽  
Short Pulse ◽  
High Energy ◽  
Self Similar ◽  
Ultra Short Pulse

scholarly journals X-ray Variability of Blazars

2002 ◽  
Vol 19 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Elena Pian
Keyword(s):  
Energy Range ◽  
High Energy ◽  
Space Missions ◽  
Present Review ◽  
Wide Energy Range ◽  
Spectral Variability ◽  
X Ray ◽  
Energy Emission ◽  
Wide Energy ◽  
High Energy Emission

AbstractCritical progress in our understanding of high energy emission from AGN has been determined in the last 10 years by X-ray monitoring campaigns with many space missions, notably ROSAT, ASCA, RXTE, BeppoSAX, and XMM, often in conjunction with observations at other frequencies. The emphasis of the present review is on recent findings about X-ray variability of blazars. Among AGN, these exhibit the largest amplitude variations of the X-ray emission, often well correlated with variations at higher energies (GeV and TeV radiation). The accurate sampling of the X-ray spectra over more than three decades in energy, made possible by the wide energy range of BeppoSAX, has also shown strong spectral variability in blazar active states, suggesting extreme electron energies and leading to the identification of a class of ‘extreme synchrotron’ sources.

scholarly journals Correlation between heavy flavour production and multiplicity in pp and p-Pb collisions at high energy in the multi-pomeron exchange model

2018 ◽  
Vol 171 ◽  
pp. 18003 ◽  
Author(s):  
Grigory Feofilov ◽  
Vladimir Kovalenko ◽  
Andrei Puchkov
Keyword(s):  
String Tension ◽  
High Energy ◽  
Exchange Model ◽  
Pomeron Exchange ◽  
Strength Parameter ◽  
Wide Energy Range ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Pp Collisions ◽  
Wide Energy

The multiplicity dependence of heavy flavour production in pp-collisions at LHC energies is studied in the framework of the multi-pomeron exchange model. The model is introducing the string-string interaction collectivity effects in pp collisions, which modifies multiplicity and transverse momenta, leading to the non-trivial mean pt vs. multiplicity (〈pt〉Nch − Nch). correlation. The string collectivity strength parameter is fixed by experimental data on multiplicity and transverse momentum correlation in a wide energy range (from ISR to LHC). The particles discrimination is implemented according to Schwinger mechanism taking into account the strong decays of hadron resonances. We demonstrate, that the faster-than-linear growth of the open charm production with the event charged particle multiplicity, observed in experimental pp high energy collisions, can be explained by the modification of the string tension due to the increasing overlap and interaction of quark-gluon strings. The model is extended for p-A interactions and the calculations for p-Pb collisions are performed.

scholarly journals Advanced scintillation materials for calorimetry at circular colliders

2021 ◽  
Vol 57 (4) ◽  
pp. 479-484
Author(s):  
M. V. Korzhik
Keyword(s):  
Time Resolution ◽  
First Generation ◽  
High Energy Physics ◽  
Hadron Collider ◽  
High Energy ◽  
High Time ◽  
Wide Energy Range ◽  
High Time Resolution ◽  
Electron Positron ◽  
Wide Energy

The most probable scenario for the development of experimental high-energy physics in the next 50 years is the creation of a family of Future Circular Colliders (FCC) at CERN, a Circular Electron–Positron Collider at China, and a Future Electron-Ion Collider at Brookhaven (USA), which continue the Large Hadron Collider (LHC) scientific program within the framework of the Standard Model and beyond it. The first generation of colliders to be put into operation will utilize the electron beam as one of the colliding species to provide precise mass spectroscopy in a wide energy range. Similarly to the measurements at the high luminosity phase of the LHC operation, the most important property of the detectors to be used in the experimental setup is a combination of the short response of the detectors and their high time resolution. The radiation tolerance to a harsh irradiation environment remains mandatory but not the main factor of the collider’s experiments using electronic beams. A short response in combination with high time resolution ensures minimization of the influence of the pile-up and spill-over effects at the high frequency of collisions (higher than 50 MGz). The radiation hardness of the materials maintains the long-term high accuracy of the detector calibration. This paper discusses the prospects for using modern inorganic scintillation materials for calorimetric detectors at future colliders.

High-energy ultra-short pulse thin-disk lasers: new developments and applications

2016 ◽  
Author(s):  
Knut Michel ◽  
Sandro Klingebiel ◽  
Marcel Schultze ◽  
Catherine Y. Tesseit ◽  
Robert Bessing ◽  
...  
Keyword(s):  
Short Pulse ◽  
High Energy ◽  
Thin Disk ◽  
New Developments ◽  
Ultra Short Pulse

Future Prospects of Gamma–Gamma Collider

2019 ◽  
Vol 10 (01) ◽  
pp. 215-226
Author(s):  
Tohru Takahashi
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Wide Energy Range ◽  
High Energy Electron ◽  
Future Prospects ◽  
Electron Positron ◽  
Complementary Role ◽  
Linear Colliders ◽  
Wide Energy ◽  
Energy Frontier

Gamma–gamma colliders based on backward Compton scattering have been discussed mainly as an option for high energy electron–positron linear colliders, aiming to play a complementary role in energy frontier physics. The flexibility of gamma-ray beam by the Compton scheme, however, allows us to apply them to physics in a wide energy range, from MeV to TeV. In this paper, we review the future prospects of gamma–gamma colliders including recent discussions about Higgs boson factories and mid- and low-energy colliders as well as the option for electron–positron linear colliders.

scholarly journals Pulse fidelity in ultra-high-power (petawatt class) laser systems

2014 ◽  
Vol 2 ◽  
Author(s):  
Colin Danson ◽  
David Neely ◽  
David Hillier
Keyword(s):  
Short Pulse ◽  
High Energy ◽  
Academic Community ◽  
Pulse Generation ◽  
The United Kingdom ◽  
Laser Facility ◽  
Laser Systems ◽  
Ultra Short Pulse ◽  
And Control ◽  
System Designs

Abstract There are several petawatt-scale laser facilities around the world and the fidelity of the pulses to target is critical in achieving the highest focused intensities and the highest possible contrast. The United Kingdom has three such laser facilities which are currently open for access to the academic community: Orion at AWE, Aldermaston and Vulcan & Astra-Gemini at the Central Laser Facility (CLF), STFC (Science and Technology Facilities Council) Rutherford Appleton Laboratory (RAL). These facilities represent the two main classes of petawatt facilities: the mixed OPCPA/Nd:glass high-energy systems of Orion and Vulcan and the ultra-short-pulse Ti:Sapphire system of Astra-Gemini. Many of the techniques used to enhance and control the pulse generation and delivery to target have been pioneered on these facilities. In this paper, we present the system designs which make this possible and discuss the contrast enhancement schemes that have been implemented.

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