Stabilization of the m=1m=1 mode in a long-thin mirror trap with high-beta anisotropic plasmas

Stability of a ``rigid'' ballooning mode $m = 1$ is studied in application to a mirror axisymmetric trap designed to confine anisotropic plasma with a large beta ($\beta$, the ratio of plasma pressure to magnetic field pressure). It was found that for effective stabilization by lateral perfectly conducting wall, the beta parameter must exceed some critical value $\beta_{\text{crit}}$. The dependence of $\beta_{\text{crit}}$ on the plasma anisotropy, mirror ratio and width of vacuum gap between plasma and the wall was studied. Unlike the works of other authors focused on the plasma model with a sharp boundary, we calculated the boundaries of the stability zone for a number of diffuse radial pressure profiles and several axial magnetic field profiles. With a combination of a conducting lateral wall and conducting end plates imitating the attachment of end MHD stabilizers to the central cell of an open trap, there are two critical values of beta and two stability zones, $\beta \beta_{\text{crit}2}$, which can merge, making the entire range of allowable beta values $0<\beta<1$ stable.Comment: 26 pages, 12 figures, 3 tables. arXiv admin note: text overlap with arXiv:2203.0837

Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. III. Genus Stueningeria Lehmann, 2019

In the third part of the revision of the family Metarbelidae (Lepidoptera) of South-Eastern Asia, we provide a revision of the genus Stueningeria Lehmann, 2019 with description of six new species: Stueningeria htetae sp. nov. (Type locality: Mynmar, 21 km E Putao), Stueningeria csovarii sp. nov. (Type locality: Thailand, Changwat Nan, 15 km N of Bo Luang), Stueningeria loeffleri sp. nov. (Type locality: Thailand, Sakhon Nakhon Prov., Phu Pan NP), Stueningeria ihlei sp. nov. (Type locality: Vietnam (C.), Prov. Thua-Thien-Hue, Kreis A Luoi, Gemeinde A Rong, Passastrasse ca. 30 km S A Luoi.), Stueningeria murzini sp. nov. (Type locality: China, SW Yunnan, Xishuanbanna, Guanping env., 60 km N Jinghong), and Stueningeria pinratanai sp. nov. (Type locality: NW Thailand, Chiangmai, Doi Pui Forest Res. Stat.) Two new combinations are established: Stueningeria campbelli (Hampson, 1910) comb. nov. and Stueningeria phaga (Swinhoe, 1894) comb. nov. Both species are redescribed. The type species of the genus Stueningeria nepalensis Lehmann, 2019 is reported for the first time for the fauna of India (Uttarakhand). We also give for the first time the description of female genitalia of the genus Stueningeria. The genus distribution map is provided

Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. VI. Genus TearbelaYakovlev & Zolotuhin gen. nov. from the Bangladesh and Marcopoloia dea(Swinhoe, 1890) comb. nov.

In the sixth part of the revision of the Asian Metarbelidae we describe a new monotypic genus, Tearbela Yakovlev & Zolotuhin, gen. nov. (type species, by original designation: Arbela theivora Hampson, 1910). Tearbela theivora (Hampson, 1910) comb. nov. and Marcopoloia dea (Swinhoe, 1890) comb. nov. are established and redescribed

Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. V. Genus Marcopoloia Yakovlev & Zolotuhin gen. nov. from the Taiwan Island and Indo-Burma biodiversity hotspot

In the fifth part of the revision on the Asian Metarbelidae we describe the new genus Marcopoloia Yakovlev & Zolotuhin, gen. nov. (type species, by original designation: Arbela discipuncta Wileman, 1915). The male and female of Marcopoloia discipuncta (Wileman, 1915) comb. nov. are redescribed; four new species Marcopoloia leloi Yakovlev & Zolotuhin, sp. nov. (type locality: C. Vietnam, Gia Lai Prov., Kon Ka Kinh NP), Marcopoloia nangmai Yakovlev & Zolotuhin, sp. nov. (type locality: Thailand, Changwat Nan, 20 km N of Bo Luang), Marcopoloia siniaevi Yakovlev & Zolotuhin, sp. nov. (type locality: Mynmar (Burma), 40 km N Myitkyina, Chanc Kand village), and Marcopoloia thaica Yakovlev & Zolotuhin, sp. nov. (type locality: Thailand, Changwat Nan, 30 km E of Pua) are described. A new synonym is established: Arbela discipuncta Wileman, 1915, syn. nov. = Arbela baibarana Matsumura, 1927

Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. II. Two monotypic genera – Ghatarbela gen. nov. and Micrarbela gen. nov. – from the Western Ghats and Sri Lanka biodiversity hotspot

Two new genera: Ghatarbela gen. nov. (type species: Ghatarbela bifidunca sp. nov.) and Micrarbela gen. nov. (type species: Arbela minima Hampson, 1910) are established in the second part of the revision of the Metarbelidae (Lepidoptera) of the Oriental Region. A new species Ghatarbela bifidunca sp. nov. (type locality: S. India, Kerala, 7 km N Munnar, Eravikulam Nat. Park) is described, and a new combination Micrarbela minima (Hampson, 1910), comb. nov. is established

Revision of the family Metarbelidae (Lepidoptera) of the Oriental Region. IV. Genus Tagoria Yakovlev & Zolotuhin, gen. nov.

In the fourth part of the revision on the Asian Metarbelidae we describe the new genus Tagoria Yakovlev & Zolotuhin, gen. nov. (type species, by original designation: Arbela watsoni Hampson, 1900). The male and female of Tagoria watsoni (Hampson, 1900) comb. nov. are redescribed, the new species Tagoria dierli Yakovlev & Zolotuhin, sp. nov. (type locality: Nepal, Rapti Tal, Monahari Khola, Belwa) is described

Improving quality of microwave heating by packaging - analytical approach

Abstract. The lecture considers the recently emerging ideas of developing non-metalli

Condensation in large closed Jackson networks

Projet MEVALRésumé disponible dans le fichier PD

Plane wave irradiation of a layered system: resonance-based control over thermal runaway

[EN] The loss factor of a material is a key characteristic behind heat generation during EM heating. For typical ceramics, the loss factor increases exponentially with temperature potentially initiating thermal runaway which can damage the material through melting or cracking. Equilibrium of EM heating can be represented by a parametric plot of the average steady-state temperature as function of the applied power that is known as a power response curve. In a layered structure, for wavelengths of the incident wave that are much larger than the layer’s thickness, the power response curve is an S-shaped bifurcation diagram (or S-curve). Stable temperatures are low at the lower branch of the S-curve and may be very high (up to ~2000 K) at the upper branch. The recent analytical and numerical models show that, for a triple (lossless-lossy-lossless) layered system, when thickness of the structure is comparable with the wavelength, an electric field resonance can be achieved in the lossy layer. This resonance causes the S-curve to acquire another (middle) stable branch and become a double S-curve. That suggests that temperatures during thermal runaway may be controlled by the field resonance. However, these models assume two-side symmetric irradiation. In this paper, we show that the resonance producing a double S-curve can be achieved in a more practical scenario with one-side irradiation: in the system with a metal plate the resonance is achieve by choosing layer's thickness and triggering a constructive interference of the incident and reflected waves. A series of double S-curves computed with COMSOL Multiphysics are analyzed, and practical ways of controlling thermal runaway in EM heating of layered structures are discussed.The authors are grateful for the support from the US Air Force Office of Scientific Research, Award FA9550-18-1-0528.Mohekar, A.; Tilley, B.; Yakovlev, V. (2019). Plane wave irradiation of a layered system: resonance-based control over thermal runaway. En AMPERE 2019. 17th International Conference on Microwave and High Frequency Heating. Editorial Universitat Politècnica de València. 292-300. https://doi.org/10.4995/AMPERE2019.2019.9940OCS29230