Experimental study of injector based on the spark source with titanium cathode saturated with hydrogen

The results of experimental study of short-pulse proton injector for various variants of construction of pulse spark ion source are considered. The experimental results of study of regimes of both ignition and discharge support within the source with stabilized pulse feeding (~10 μs, 5 Hz). Of special concern the increasing of the cathode electrode lifetime. The results ofmeasurements ofboth absolute and partial (in spices) density ofion beam are presented.Представлені результати іспитів короткоімпульсного інжектора протонів для різних варіантів виконання конструкції імпульсного іскрового джерела. Приводяться експериментальні результати відпрацьовування оптимальних режимів порушення і підтримки розряду в джерелі зі стабілізованим імпульсним живлення (~ 10 мкс, 5 Гц).Представлены результаты испытаний короткоимпульсного инжектора протонов для различных вариантов выполне- ния конструкции импульсного искрового источника. Приводятся экспериментальные результаты отработки оптимальных режимов возбуждения и поддержания разряда в источнике со стабилизированным импульсным питанием (~ 10 мкс, 5 Гц)

MITES (ACARI) PHORETIC ON SIX-TOOTHED SPRUCE BARK BEETLE, PITYOGENES CHALCOGRAPHUS LINNAEUS (COLEOPTERA: CURCULIONIDAE: SCOLYTINAE), IN WESTERN SIBERIA, RUSSIA

In total 11 species of mites were revealed to be phoretic on Pityogenes chalcographus L. in a spruce-pine forest near Tyumen, Western Siberia, Russia: Uroobovella ipidis (Vitzthum, 1923) (Urodinychidae), Trichouropoda polytricha (Vitzthum, 1923) (Trematuridae), Pleuronectocelaeno barbara Athias-Henriot, 1959 (Celaenopsidae), Schizosthetus sp. (Parasitidae), Dendrolaelaps (Ipidodendrolaelaps) quadrisetosimilis Hirschmann, 1960 (Digamasellidae), Proctolaelaps fiseri Samsinak, 1960 (Melicharidae), Siculobata (Paraleius) leontonycha (Berlese, 1910) (Scheloribatidae), Histiostoma piceae Scheucher, 1957 (Histiostomatidae), Pyemotes dryas (Vitzthum, 1923) (Pyemotidae), Heterotarsonemus coleopterorum (Schaarschmidt, 1959), and Tarsonemus bistridentati Magowski and Khaustov, 2006 (Tarsonemidae). The hyperphoresy by deutonymphs of Histiostoma picea and Trichouropoda polytricha on other phoretic mites on bark beetles are recorded. DOI: 10.21684/0132-8077-2016-24-2-137-15

REVIEW OF MITES (ACARI) ASSOCIATED WITH THE EUROPEAN SPRUCE BARK BEETLE, IPS TYPOGRAPHUS (COLEOPTERA: CURCULIONIDAE: SCOLYTINAE) IN ASIAN RUSSIA

A total of 68 mite species were collected on Ips typographus and in their galleries in Siberia and in the Far East of Russia: Cercoleipus kuznetsovi (Cercomegistidae), Pleuronectocelaeno barbara, P. japonica (Celaenopsidae), Uroobovella ipidis (Urodinychidae), Trichouropoda polytricha, T. karawaiewi, T. structura (Trematuridae), Schizosthetus sp. (Parasitidae), Dendrolaelaps (Ipidodendrolaelaps) quadrisetus, Dendrolaelaps (Insectolaelaps) pini, Dendrolaelaps (Apophyseodendrolaelaps) disetosimilis (Digamasellidae), Macrocheles (s. str.) ivanovi (Macrochelidae), Gamasellodes tatricus (Ascidae), Proctolaelaps fiseri, P. hystricoides, P. juradeus (Melicharidae), Ereynetes (Huntereynetes) sp. (Ereynetidae), Mexecheles virginiensis (Cheyletidae), Dolichocybe sibiriensis (Dolichocybidae), Pyemotes sp. (Pyemotidae), Aethiophenax ipidarius (Acarophenacidae), Microdispodides moseri, Elattoma crossi (Pygmephoridae), Coleopygmephorus bogenschutzi, C. hylophilus, C. typographus (Neopygmephoridae), Scutacarus pseudoplurisetus, S. scolyti, S. muscocicola, S. palustris (Scutacaridae), Iponemus gaebleri gaebleri, Tarsonemus striatus, T. (Schaarschmidtia) bistridentati, T. typographi, Heterotarsonemus lindquisti (Tarsonemidae), Siculobata (Paraleius) leontonycha (Scheloribatidae), Acarus sp., Boletoglyphus boletophagi, Forcellinia wasmanni, Ipsoglyphus bochkovi, Kuzinia laevis, Naiadacarus sp., Schwiebea sp. eurynympha-group [punctate dorsum], Sch. sp. eurynympha-group [small, unsclerotized, 1a, 3a filiform], Sch. nesbitti, Sch. nova, Sch. sp.1 nova-group [two tibial setae, regular attachment organ], Sch. sp. nova-group [two tibial setae, wide attachment organ], Sch. sp. nova-group [granulate dorsum, short legs III–IV], Sch. scheucherae, Thyreophagus corticalis, Th. entomophagus, Th. aff. odyneri, Tyrophagus putrescentiae (Acaridae), Divilia aff. occidentalis, D. sp., Hemisarcoptes sp., Nanacarus sp.1, N. sp.2, Superioropus huronmontanus (Hemisarcoptidae), Parawinterschmidtia kneissli, Saproglyphus aff. hagensis, S. waldorfae (Winterschmidtiidae), Histiostoma ovalis, H. piceae, H. pini, Probonomoia pini, P. sibirica (Histiostomatidae). The following taxa are recorded for the first time: for the Palaearctic—Superioropus huronmontanus (genus and species); for Russia—Pleuronectocelaeno japonica, Trichouropoda karawaiewi, Dendrolaelaps pini, Gamasellodes tatricus, Scutacarus palustris, Tarsonemus typographi, Heterotarsonemus lindquisti, Hemisarcoptes, Saproglyphus waldorfae, Naiadacarus, Schwiebea nesbitti, Histiostoma pini, and H. ovalis. Of them, 60 species were collected by catching beetles with pheromone traps and examining them for phoretic mites. We provide information on the current distribution, host association, and biology of these mites. In this article, we also discuss the following information, which we have documented: our biological observations of mites in the beetles’ galleries, abundance of phoretic mites on hosts, as well as specific sites where they occur. To facilitate morphological diagnostics, common mite species were illustrated using a Scanning Electron Microscope (SEM), as well as light microscopy. DOI: 10.21684/0132-8077-2018-26-1-3-7