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Kinetics of decay of exoelectron emission from the surface of deformed aluminium (USSR)
Classified
abstracts
2365-2379
8 _I IO-’ torr during measurcmcnts in dcpcndcncc ture of the effusion chamber. L 1, Shimon et al, Z/r Tekh Fi;, 45 (3). 1975, 688-689
on the tempcra(in Rm~imr). I2
2365. Scattering of potassium and sodium ions on atoms of helium, neon, argon and xenon. (USSR) The integral cross sections of elastic scattering to of 0.04 rad of potassium and sodium ions on atoms Xe are measured in the ion energy range of 5 to 600 results are discussed. V I Chigin, Z/I Tekh Fiz, 45 (3), 1975. 682-685 (i/r
a minimum angle of He, Ne, Ar and eV. Experimental Rm~inn). II
2366. The influence of incidence angle of electrons on structure of secondary-emission characteristics of single crystals. (USSR) The influence of the angle of incidence of primary electrons on the structure and the dependence of the coefficient of secondary electron emission on electron energy are investigated for the (I I I) tungsten face. Experimental results arc discussed. M V Gomoyunova and B Z Aliev, Emhim E/wrronic~, Co//, Ryazan 1974, 75-84 (in Russiarr). I2
2367. Some features of thermionic emission from aluminium thin films. (USSR)
oxide
Thermionic emission from thin films of aluminium oxide with thickness of 15 to 20 pm, deposited by electrophoresis on polycrystalline tungsten ribbon, is investigated. The emitters were heated to 1900’K in a vacuum of IO-* torr for a long time to obtain stable and reproducible emission characteristics. It is found that the polarization of the dielectric in the internal field, appearing at 1450”K, strongly influences the electron emission from aluminium oxide. This polarization appears relatively rapidly and it depends on the magnitude of external positive voltage. The depolarization proceeds considerably slower, it strongly depends on the sign and magnitude of the external voltage and in some cases it possesses rather complex characteristics. It is proposed that electron processes in the dielectric layei play a considerable role in the observed polarization. V G Bazanov et al, Zh Tekh Fiz, 45 (3). 1975. 676-678 (ifi Russian). I2
2368. Cataphoresis in glow discharge. (USSR) Cataphoresis in the cathode region of glow discharge is studied. It is shown that the space charge can considerably influence the distribution of impurity atoms. I V Krasnov and N Ya Shaparev, Z/I Tekh Fiz, 45 (6), 1975, 1294-l 295 (in Rmsim). I2
2369. On the problem of generating ionizing shock waves with the aid of pulsed electric discharge. (USSR) It is shown experimentally that moving discharge and shock-heated plasma are generated in an electric shock tube at an argon pressure of 5 x IO-’ torr and with additional pulsed gas admission. Yu I Chutov and V A Zhovtyanaskiy, Z/l Tckh Fiz, 45 (6), 1975, 1221-l 224 (in Russian).
12 2370. Kinetics of decay of exoelectron emission from the surface of deformed aluminium (USSR) Kinetics of the photostimulated exoelectron emission current from aluminium surface after deformation is investigated in a vacuum of 5 x lo-’ torr with the aid of an electron multiplier. Experimental results are discussed. L S Palatnik et al, Fiz Tuerd Tela, 17 (6), 1975, I81 8-l 820 (irr Russim). 12
2371. On regular oscillations in glow discharge with cross fields. (USSR) Regular oscillations on the volt-ampere characteristic of low-voltage glow discharge in hydrogen in crossed fields are investigated. The gas pressure was varied between 1 x 10s2 to 1 x IO-’ torr. It is found that the oscillations can have as large amplitude as 200 V at low discharge currents. A I Kuzmichev and A I Shendakov, Zh Tekh Fiz, 45 (6), 1975, 1349-l 350 (in Russian).
12 2372. Relaxation of optically oriented mercury atoms Hglg9, Hg*O’ in the presence of buffer gases. (USSR) The
40
longitudinal
time
component
of the
relaxation
of optically
oriented mercury atoms Hg’““, Hg”” are measured during their ditfusion in inert gases in steady magnetic field. The mercury vapour prcssurc in the measuring ccl1 was IO-” torr and the pressure of bullcr gases was varied in the range of 2 IO- ’ IO 4.5 torr. A N Kuznctsov ct al, Oprika Spekrroskop. 38 (6). 1975, 1062-1066 (i/t Ruxsimr). I’
2373. Investigation of the processes of neon excitation in the hcliumneon mixture in the cathode region and in the positive discharge column. (USSR) The concentrations of metastable neon and helium aloms arc measured in a plane diode at helium-neon mixture pressure of 4 torr and in a positive column at helium-neon mixture pressure of I torr. Expcrimcntal results arc discussed. M K Dyatlov et al., Oprika Spc~kwoskop, 38 (6). 1975, 1071-1077 (in Rmsiun).
2374. On the process of excitation and radiation in the negative glow of glow discharge. I. (USSR) Spectroscopical measurement of negative glow of glow discharge in argon at pressure ranging from 0.5 IO 2 torr have been performed using a special discharge tube with movable electrodes. Yu M Kagan et al, Oprika Spekrroskop, 38 (6), 1975, 1078-1085 (in Russian). I2
2375. Absolute cross sections for excitation of a resonance level of Ca+ ion by electron impact. (USSR) Using a device with crossing Ca+ ion and electron beams, the effective cross sections for excitation of the resonance 4’P-level of Call are measured in the energy range from the threshold to 100 eV. The residual gas pressure in the collision region was 5 IO-” torr. V A Kelman and A I Imre, Optico Spek/roskop, 38 (6), 1975, 1226-l 227 (in Russia& 12 2376. Two-stage photoionization of rubidium atom. (USSR) The process of two-stage photoionization of rubidium atoms is investigated in an experimental device at rubidium vapour pressure of lO-3 torr. Experimental results are discussed. A N Klyucharev and V Yu Sepman, Oprika .Spek/oskop, 38 (6). 1975, 1230-I 231 (it] Russian). I2 2377. On efficiency of surface tubular ionizer. (USSR) Efficiency of a surface tubular ionizer, used in mass spectrometers and electromagnetic mass separators, is studied. It is shown that it is possible to enhance the efficiency of surface tubular ionizers by a suitable method of ion extraction. V V Kalygin and V M Prokopev, Z/i Tekh Fiz, 45 (6). 1975, 1284-l 287 (in Russian). I2
2378. Angular distribution of photoelectrons ejected by ultrasoft X-rays generated by a ring anode. (USSR) Angular distribution of photoelectrons ejected by ultrasoft X-rays generated by a ring anode is calculated. The results enable one to determine the luminosity of sources in photoelectron spectrometers. M L Aleksandrov et al, Z/I Tekh Fiz, 45 (6), 1975, 1288-1293 (in Russian). I2
2379. Investigation of the formation of ion beams in vacuum diode. (USSR) It is shown that ion beams can be generated during the high-voltage stage of a vacuum discharge. Mass composition, energy and time characteristics of ion beams generated in a vacuum diode are investigated. The breakdown was performed between a tip cathode and anodes of AI, Cu, MO and W. The cathode tip was mounted on a disc under an angle of 10” with respect to the axis of an interelectrode gap of 0.3 to 5 mm length. The ion beam generated in the vacuum diode was transmitted through a 3 mm opening in the cathode disc into a Thomson mass spectrograph. The pressure in the massspectrograph chamber was 1 x 10m5 torr. Positive voltage pulses with amplitudes of 10 to 30 kV, length of 5 to 150 nsec and rise time of 2 nsec were applied to the anode of the vacuum diode. It is found that ions are formed in the anode region under the action of the electron beam. The independence of the mass composition of the ion beam from the electrode material indicates that mainly gas molecules
abstracts
2365-2379
8 _I IO-’ torr during measurcmcnts in dcpcndcncc ture of the effusion chamber. L 1, Shimon et al, Z/r Tekh Fi;, 45 (3). 1975, 688-689
on the tempcra(in Rm~imr). I2
2365. Scattering of potassium and sodium ions on atoms of helium, neon, argon and xenon. (USSR) The integral cross sections of elastic scattering to of 0.04 rad of potassium and sodium ions on atoms Xe are measured in the ion energy range of 5 to 600 results are discussed. V I Chigin, Z/I Tekh Fiz, 45 (3), 1975. 682-685 (i/r
a minimum angle of He, Ne, Ar and eV. Experimental Rm~inn). II
2366. The influence of incidence angle of electrons on structure of secondary-emission characteristics of single crystals. (USSR) The influence of the angle of incidence of primary electrons on the structure and the dependence of the coefficient of secondary electron emission on electron energy are investigated for the (I I I) tungsten face. Experimental results arc discussed. M V Gomoyunova and B Z Aliev, Emhim E/wrronic~, Co//, Ryazan 1974, 75-84 (in Russiarr). I2
2367. Some features of thermionic emission from aluminium thin films. (USSR)
oxide
Thermionic emission from thin films of aluminium oxide with thickness of 15 to 20 pm, deposited by electrophoresis on polycrystalline tungsten ribbon, is investigated. The emitters were heated to 1900’K in a vacuum of IO-* torr for a long time to obtain stable and reproducible emission characteristics. It is found that the polarization of the dielectric in the internal field, appearing at 1450”K, strongly influences the electron emission from aluminium oxide. This polarization appears relatively rapidly and it depends on the magnitude of external positive voltage. The depolarization proceeds considerably slower, it strongly depends on the sign and magnitude of the external voltage and in some cases it possesses rather complex characteristics. It is proposed that electron processes in the dielectric layei play a considerable role in the observed polarization. V G Bazanov et al, Zh Tekh Fiz, 45 (3). 1975. 676-678 (ifi Russian). I2
2368. Cataphoresis in glow discharge. (USSR) Cataphoresis in the cathode region of glow discharge is studied. It is shown that the space charge can considerably influence the distribution of impurity atoms. I V Krasnov and N Ya Shaparev, Z/I Tekh Fiz, 45 (6), 1975, 1294-l 295 (in Rmsim). I2
2369. On the problem of generating ionizing shock waves with the aid of pulsed electric discharge. (USSR) It is shown experimentally that moving discharge and shock-heated plasma are generated in an electric shock tube at an argon pressure of 5 x IO-’ torr and with additional pulsed gas admission. Yu I Chutov and V A Zhovtyanaskiy, Z/l Tckh Fiz, 45 (6), 1975, 1221-l 224 (in Russian).
12 2370. Kinetics of decay of exoelectron emission from the surface of deformed aluminium (USSR) Kinetics of the photostimulated exoelectron emission current from aluminium surface after deformation is investigated in a vacuum of 5 x lo-’ torr with the aid of an electron multiplier. Experimental results are discussed. L S Palatnik et al, Fiz Tuerd Tela, 17 (6), 1975, I81 8-l 820 (irr Russim). 12
2371. On regular oscillations in glow discharge with cross fields. (USSR) Regular oscillations on the volt-ampere characteristic of low-voltage glow discharge in hydrogen in crossed fields are investigated. The gas pressure was varied between 1 x 10s2 to 1 x IO-’ torr. It is found that the oscillations can have as large amplitude as 200 V at low discharge currents. A I Kuzmichev and A I Shendakov, Zh Tekh Fiz, 45 (6), 1975, 1349-l 350 (in Russian).
12 2372. Relaxation of optically oriented mercury atoms Hglg9, Hg*O’ in the presence of buffer gases. (USSR) The
40
longitudinal
time
component
of the
relaxation
of optically
oriented mercury atoms Hg’““, Hg”” are measured during their ditfusion in inert gases in steady magnetic field. The mercury vapour prcssurc in the measuring ccl1 was IO-” torr and the pressure of bullcr gases was varied in the range of 2 IO- ’ IO 4.5 torr. A N Kuznctsov ct al, Oprika Spekrroskop. 38 (6). 1975, 1062-1066 (i/t Ruxsimr). I’
2373. Investigation of the processes of neon excitation in the hcliumneon mixture in the cathode region and in the positive discharge column. (USSR) The concentrations of metastable neon and helium aloms arc measured in a plane diode at helium-neon mixture pressure of 4 torr and in a positive column at helium-neon mixture pressure of I torr. Expcrimcntal results arc discussed. M K Dyatlov et al., Oprika Spc~kwoskop, 38 (6). 1975, 1071-1077 (in Rmsiun).
2374. On the process of excitation and radiation in the negative glow of glow discharge. I. (USSR) Spectroscopical measurement of negative glow of glow discharge in argon at pressure ranging from 0.5 IO 2 torr have been performed using a special discharge tube with movable electrodes. Yu M Kagan et al, Oprika Spekrroskop, 38 (6), 1975, 1078-1085 (in Russian). I2
2375. Absolute cross sections for excitation of a resonance level of Ca+ ion by electron impact. (USSR) Using a device with crossing Ca+ ion and electron beams, the effective cross sections for excitation of the resonance 4’P-level of Call are measured in the energy range from the threshold to 100 eV. The residual gas pressure in the collision region was 5 IO-” torr. V A Kelman and A I Imre, Optico Spek/roskop, 38 (6), 1975, 1226-l 227 (in Russia& 12 2376. Two-stage photoionization of rubidium atom. (USSR) The process of two-stage photoionization of rubidium atoms is investigated in an experimental device at rubidium vapour pressure of lO-3 torr. Experimental results are discussed. A N Klyucharev and V Yu Sepman, Oprika .Spek/oskop, 38 (6). 1975, 1230-I 231 (it] Russian). I2 2377. On efficiency of surface tubular ionizer. (USSR) Efficiency of a surface tubular ionizer, used in mass spectrometers and electromagnetic mass separators, is studied. It is shown that it is possible to enhance the efficiency of surface tubular ionizers by a suitable method of ion extraction. V V Kalygin and V M Prokopev, Z/i Tekh Fiz, 45 (6). 1975, 1284-l 287 (in Russian). I2
2378. Angular distribution of photoelectrons ejected by ultrasoft X-rays generated by a ring anode. (USSR) Angular distribution of photoelectrons ejected by ultrasoft X-rays generated by a ring anode is calculated. The results enable one to determine the luminosity of sources in photoelectron spectrometers. M L Aleksandrov et al, Z/I Tekh Fiz, 45 (6), 1975, 1288-1293 (in Russian). I2
2379. Investigation of the formation of ion beams in vacuum diode. (USSR) It is shown that ion beams can be generated during the high-voltage stage of a vacuum discharge. Mass composition, energy and time characteristics of ion beams generated in a vacuum diode are investigated. The breakdown was performed between a tip cathode and anodes of AI, Cu, MO and W. The cathode tip was mounted on a disc under an angle of 10” with respect to the axis of an interelectrode gap of 0.3 to 5 mm length. The ion beam generated in the vacuum diode was transmitted through a 3 mm opening in the cathode disc into a Thomson mass spectrograph. The pressure in the massspectrograph chamber was 1 x 10m5 torr. Positive voltage pulses with amplitudes of 10 to 30 kV, length of 5 to 150 nsec and rise time of 2 nsec were applied to the anode of the vacuum diode. It is found that ions are formed in the anode region under the action of the electron beam. The independence of the mass composition of the ion beam from the electrode material indicates that mainly gas molecules