Test beam studies of the TRD prototype filled with different gas mixtures based on Xe, Kr, and Ar

Towards the end of LHC Run1, gas leaks were observed in some parts of the Transition Radiation Tracker (TRT) of ATLAS. Due to these leaks, primary Xenon based gas mixture was replaced with Argon based mixture in various parts. Test-beam studies with a dedicated Transition Radiation Detector (TRD) prototype were carried out in 2015 in order to understand transition radiation performance with mixtures based on Argon and Krypton. We present and discuss the results of these test-beam studies with different active gas compositions.Comment: 5 pages,12 figures, The 2nd International Conference on Particle Physics and Astrophysics (ICPPA-2016); Acknowledgments section correcte

Some results of test beam studies of Transition Radiation Detector prototypes at CERN

Operating conditions and challenging demands of present and future accelerator experiments result in new requirements on detector systems. There are many ongoing activities aimed to develop new technologies and to improve the properties of detectors based on existing technologies. Our work is dedicated to development of Transition Radiation Detectors (TRD) suitable for different applications. In this paper results obtained in beam tests at SPS accelerator at CERN with the TRD prototype based on straw technology are presented. TRD performance was studied as a function of thickness of the transition radiation radiator and working gas mixture pressure

Identification of particles with Lorentz factor up to 10410^{4} with Transition Radiation Detectors based on micro-strip silicon detectors

This work is dedicated to the study of a technique for hadron identification in the TeV momentum range, based on the simultaneous measurement of the energies and of the emission angles of the Transition Radiation (TR) X-rays with respect to the radiating particles. A detector setup has been built and tested with particles in a wide range of Lorentz factors (from about $10^3$ to about $4 \times 10^4$ crossing different types of radiators. The measured double-differential (in energy and angle) spectra of the TR photons are in a reasonably good agreement with TR simulation predictions.Comment: 31 pages, 12 figures, paper published on Nuclear Instruments & Methods

Лапароскопически-ассистированное устранение послеоперационного осложения чрескожной эндоскопической гастростомии

Percutaneous endoscopic gastrostomy (PEG) is widely used in a group of patients with dysphagia syndrome who require nutritional support with enteral nutrition. In the above observation, a severe complication of PEG is secondary non-circumscribed serous-purulent peritonitis, which developed in connection with the failure of PEG, against the background of cachexia, hypoproteinemia and hypercatabolism. The operation of choice was video laparoscopic surgery, revision and sanitation of the abdominal cavity was performed. The main stage of the operation was gastropexy (the stomach wall to the parietal peritoneum) with three vicryl sutures, which made it possible to seal the gastrostomy area. Чрескожная эндоскопическая гастростомия (ЧЭГ) получила широкое применение в группе пациентов с синдромом дисфагии и требующих нутриционной поддержки энтеральным питанием. В приведенном наблюдении тяжелое осложнение ЧЭГ — вторичный неотграниченный серозногнойный перитонит, развившийся в связи с несостоятельностью ЧЭГ, на фоне кахексии, гипопротеинемии и явлений гиперкатаболизма. Операцией выбора стала видеолапароскопическая операция, в ходе которой была выполнена ревизия и санация брюшной полости. Основным этапом операции стала гастропексия (стенки желудка к париетальной брюшине) тремя викриловыми швами, что позволило герметизировать область гастростомы.

СИСТЕМА ОРГАНІЗАЦІЙНИХ ЗАХОДІВ, СПРЯМОВАНИХ НА ПОКРАЩАННЯ РЕПРОДУКТИВНОГО ЗДОРОВ’Я ЖІНОК ФЕРТИЛЬНОГО ВІКУ, МЕШКАНОК СІЛЬСЬКОГОСПОДАРСЬКОГО РЕГІОНУ

The principal element of this actions isC entrsof age women’s health, which work direct on a prophilaxisand in which not only medical-social but psichological, social and legal suport must provide. Those Centrwasorginized and is successfully functioning in Borispil region on base of Central region’s hospital. The system of organisation actions, which was stated, could successfully use in healthcare for provide of safety motherhood.В статье изложена система организационых мероприятий, направленых на улучшение репродуктивного здоровья женщин фертильного возраста, жительниц сельскохозяйственного региона. Ключевым элементом организационых мероприятий есть Центры здоровья женщины, деятельность которых направлена, главным образом, на профилактику, в которых обеспечивается не только медико-санитарная и лечебная помощь, но и психологическая, социальная и правовая поддержка. Такой Центр создан и успешно функционирует в Бориспольском районе Киевской области на базе ЦРБ. Созданная система медицинских мероприятий может успешно применятся в сфере охраны здоровья для обеспечения безопастного материнства.В статті викладена система організаційних заходів, спрямованих на покращання репродуктивного здоров’я жінок фертильного віку, мешканок сільськогосподарського регіону. Ключовим елементом розроблених заходів є Центри здоров’я жінки, діяльність яких спрямована на профілактику, у яких має забезпечуватись не тільки медико-санітарна та лікувальна допомога, а й психологічна, соціальна та правова підтримка. Такий Центр створено та успішно функціонує в Бориспільському районі Київськоїобласті на базі ЦРЛ. Створена система медичних заходів може з успіхом застосовуватись в галузі охорони здоров’я для забезпечення безпечного материнства

A concept of the transition radiation detector for a hadron separation in a forward direction of the LHC experiments

Studying of hadron production in forward direction at the LHC energy has a great interest both for understanding of the fundamental QCD processes and also in applied areas such as the description of ultra-high energy cosmic particle interactions. The energies of secondary hadrons in such studies almost reach the maximum energy available at the LHC of ∼6 TeV, which corresponds to a Lorentz γ-factor up to 104 and above. The only effective technique able to identify particles in this range is based on the transition radiation detectors (TRD). Prototypes of such kind of detector were built and tested at the CERN SPS accelerator. Some experimental results obtained in these tests are briefly presented here and compared with Monte Carlo (MC) simulations. MC model demonstrates a good agreement with the experiment. On this basis a concept of a full-scale TRD optimized for the hadron identification in the TeV energy region is proposed. Different particle identification techniques were considered and examined. The expected detector performance to reconstruct secondary hadrons produced in forward direction at the LHC is presented

Test beam studies of possibilities to separate particles with gamma factors above 10\u3csup\u3e3\u3c/sup\u3e with straw based Transition Radiation Detector

Measurements of hadron production in the TeV energy range are one of the tasks of the future studies at the Large Hadron Collider (LHC). The main goal of these experiments is a study of the fundamental QCD processes at this energy range, which is very important not only for probing of the Standard Model but also for ultrahigh-energy cosmic particle physics. One of the key elements of these experiments measurements are hadron identification. The only detector technology which has a potential ability to separate hadrons in this energy range is Transition Radiation Detector (TRD) technology. TRD prototype based on straw proportional chambers combined with a specially assembled radiator has been tested at the CERN SPS accelerator beam. The test beam results and comparison with detailed Monte Carlo simulations are presented here

Registration of the transition radiation with GaAs detector: Data/MC comparison

New developments of pixel detectors based on GaAs sensors offer effective registration of the transition radiation (TR) X-rays and perform simultaneous measurements of their energies and emission angles. This unique feature opens new possibilities for particle identification on the basis of maximum available information about generated TR photons. Results of studies of TR energy-Angular distributions using a 500 |j.m thick GaAs sensor attached to a Timepix3 chip are presented. Measurements, analysis techniques and a comparison with Monte Carlo (MC) simulations are described and discussed

A facility to Search for Hidden Particles (SHiP) at the CERN SPS

A new general purpose fixed target facility is proposed at the CERN SPS accelerator which is aimed at exploring the domain of hidden particles and make measurements with tau neutrinos. Hidden particles are predicted by a large number of models beyond the Standard Model. The high intensity of the SPS 400~GeV beam allows probing a wide variety of models containing light long-lived exotic particles with masses below ${\cal O}$(10)~GeV/c$^2$, including very weakly interacting low-energy SUSY states. The experimental programme of the proposed facility is capable of being extended in the future, e.g. to include direct searches for Dark Matter and Lepton Flavour Violation.Comment: Technical Proposa