Status of modern mirror studies in Novosibirsk

Mirrors have a number of advantages in comparison with the closed magnetic systems like tokamak, stellarator, etc. In principle, mirrors are very attractive from the engineering point of view, if the plasma confined in axisymmetric magnetic systems would be MHD stable. At present, the MHD stabile confinement has already been demonstrated for all axisymmetric traps designed in Novosibirsk for the value of β value as high as 0.4. Some important results were obtained recently in the GOL- 3and GDT experiments. In the paper, the status of two mirror traps in Novosibirsk is presented and description of the main experimentsis given.Відкриті магнітні пастки мають ряд переваг у порівнянні з замкнутими магнітними системами, подібними токамаку, стелларатору і т.д. У принципі, відкриті системи досить привабливі з інженерної точки зору, якщо плазма утримується в осесиметричній магнітній конфігурації, залишаючись МГД стійкої. В даний час МГД стійке утримання вже продемонстроване для осесиметричних пасток, досліджуваних у Новосибірську, аж до величини β=0.4. Важливі результати отримані недавно на установці ГОЛ-3 і в експериментах з газодинамічною пасткою ГДЛ. У даній роботі представлений стан робіт на двох магнітних пастках у Новосибірську і приведені результати основних експериментів.Открытые магнитные ловушки имеют ряд преимуществ по сравнению с замкнутыми магнитными системами, подобными токамаку, стелларатору и т.д. В принципе, открытые системы весьма Problems of Atomic Science and Technology. 2005. № 1. Series: Plasma Physics (10). P. 7-11 привлекательны с инженерной точки зрения, если плазма удерживается в осесимметричной магнитной конфигурации, оставаясь МГД устойчивой. В настоящее время МГД устойчивое удержание уже продемонстрировано для осесимметричных ловушек, исследуемых в Новосибирске, вплоть до величины β =0.4. Важные результаты получены недавно на установке ГОЛ-3 и в экспериментах с газодинамической ловушкой ГДЛ. В данной работе представлено состояние работ на двух магнитных ловушках в Новосибирске и приведены результаты основных экспериментов

Correction of metabolic changes in the tissues of oral cavity of rats using a complex of drugs under the conditions of pathological factors

Hypoxia is a typical pathological process that occurs when tissues are insufficiently supplied with oxygen or when its utilization is impaired. One of the most important pathogenetic factors in the development of tissue hypoxia is the disintegration of the structure of mitochondrial membranes which occurs under the influence of various etiological factors. In children who suffered hypoxia in the antenatal period, the frequency of developmental delays is significantly increased, and the incidence of caries is also shown to increase as compared to healthy children. Based on the above, this work is relevant for modern dentistry. The work is devoted to the study of the state of the maxillofacial system and tissues of the oral cavity of rats under the influence of the complex of drugs under the conditions of intrauterine hypoxia, cariogenic diet, thyroid insufficiency and fluorine deficiency. The subjects of the study were 25 female white rats of the Wistar line of herd breeding from the vivarium of the SE “ISMFS NAMS” kept on a standard vivarium diet. The animals were divided into three groups – intact (7 rats), pathology model (8 rats), pathology model and drug complex (8 rats). Animals were removed from the experiment under thiopental anesthesia (40 mg/kg). Lower jaws and pulp were removed. As a result of the research, it was established that the proposed treatment-prophylactic complex has a pronounced caries-prophylactic and periodontoprotective effect. The caries-preventive effectiveness of the complex was due to its ability to stimulate the mineralizing function of the dental pulp, namely, to increase the activity of alkaline phosphatase of the pulp, as an indicator of the activation of osteoblasts, against the background of a decrease in the activity of acid phosphatase, a marker of osteoclasts

Exactly soluble coherent state path integral with non-polynomial action

We present an example of an exactly soluble bosonic coherent state path integral with non-polynomial action

Supersymmetric null-surfaces

Single trace operators with the large R-charge in supersymmetric Yang-Mills theory correspond to the null-surfaces in $AdS_5\times S^5$. We argue that the moduli space of the null-surfaces is the space of contours in the super-Grassmanian parametrizing the complex $(2|2)$-dimensional subspaces of the complex $(4|4)$-dimensional space. The odd coordinates on this super-Grassmanian correspond to the fermionic degrees of freedom of the superstring.Comment: v4: added a reference to the earlier work; corrected the formula for the stabilizer of the BMN vacuum; added the discussion of the complex structure of the odd coordinates in Section 3.

Diffractive light vector meson production at large momentum transfers

The diffractive process $\gamma^*(Q^2) p\to V+X$ (where $V= \rho^0, \omega , \phi$ are the vector mesons, consisted of light quarks, $X$ represents the hadrons to that a proton dissociates) is studied. We consider the region of large momentum transfers, $|t|>>\Lambda^2_{QCD}$, and large energies, s. In the leading log approximation of perturbative QCD ( using BFKL equation ) the asymptotic behaviour of the cross section in the limit $s\to\infty , s>>|t|, Q^2$ is obtained. We compare the results derived from BFKL equation with that obtained in the lowest order of QCD (two--gluon exchange in the $t$- channel). The possibility to investigate these reactions at HERA is discussed.Comment: 14 pages (LateX), one LaTeX figure using feynman.te

Study of the radiative decay ϕ→ηγ\phi \to \eta \gamma with CMD-2 detector

Using the $1.9 pb^{-1}$ of data collected with the CMD-2 detector at VEPP-2M the decay mode $\phi \to \eta \gamma$, $\eta \to \pi^+\pi^-\pi^0$ has been studied. The obtained branching ratio is B($\phi \to \eta \gamma) = (1.18 \pm 0.03 \pm 0.06)$.Comment: 13 pages, 5 figures, LaTex2e, to be published in Phys. Lett.