The Physics of Non-Ideal Plasma

Фортов, В. Е.; Iakubov, I. T.

doi:10.1142/3634

Cited by 104 publications

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“…The problem is close related to dust plasma [2], and to the role of dust in fusion devices [3], where micro-and nano-particles are heated to high temperatures and radiation energy losses can play decisive role in the energy balance of the particles. The effect of metal clusters on emission spectra was discussed in [4].…”

Section: Introductionmentioning

confidence: 99%

“…One of the most important trends in the nanotechnology is obtaining and using of nanopowders, which can be used in metallurgy, microelectronics, and medicine and food industry. Production and processing of nanopowders are frequently dealt with heating of nanoparticles to high temperatures when intensive thermal radiation can be expected.The problem is close related to dust plasma [2], and to the role of dust in fusion devices [3], where micro-and nano-particles are heated to high temperatures and radiation energy losses can play decisive role in the energy balance of the particles. The effect of metal clusters on emission spectra was discussed in [4].…”

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confidence: 99%

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Thermal Radiation from Nanoparticles

Martynenko

Ognev

2005

Tech. Phys.

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The thermal radiation of small conducting particles was investigated in the region where the Stephan-Boltzmann law is not valid and strongly overestimates radiation losses. The new criterion for the particle size, at which black body radiation law fails, was formulated. The critical radius r c is expressed through a combination of temperature T and particle conductivity σ: thus r c = c(ћ/2πσkT) 1/2 . The approach is based on the magnetic particle polarization, which is valid until very small sizes (cluster size) where due to drop of particle conductivity the electric polarization prevails over the magnetic one. It was also shown that the radiation power of clusters, estimated on the basis of the experimental data, is lower than that given by theStephan-Boltzmann law.In the last years the amount of research in the field of nanotechnology, nanomaterials and nanosystems tremendously increased [1]. One of the most important trends in the nanotechnology is obtaining and using of nanopowders, which can be used in metallurgy, microelectronics, and medicine and food industry. Production and processing of nanopowders are frequently dealt with heating of nanoparticles to high temperatures when intensive thermal radiation can be expected.The problem is close related to dust plasma [2], and to the role of dust in fusion devices [3], where micro-and nano-particles are heated to high temperatures and radiation energy losses can play decisive role in the energy balance of the particles. The effect of metal clusters on emission spectra was discussed in [4].

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Thermal Radiation from Nanoparticles

Martynenko

Ognev

2005

Tech. Phys.

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“…Our results are in good agreement with calculations and experimental data available in literature. Presented work is a part of our project focused on preparation and study of Rydberg matter and ultracold plasma.Our research project is focused on study of a Rydberg matter and non-ideal plasma [1,2]. Results of the research can be useful for fundamental physics and for some applications as quantum computers.…”

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confidence: 99%

“…Our research project is focused on study of a Rydberg matter and non-ideal plasma [1,2]. Results of the research can be useful for fundamental physics and for some applications as quantum computers.…”

mentioning

confidence: 99%

“…The problem is to diagnose highly-excited states. In addition to the traditional approach, induced ionization of Rydberg atoms by applied electric field [2], recently EIT [5] and FWM [6] techniques have been used for identification of the Rydberg transitions. As the first step in our research project we have performed cw two-step excitation of ultracold lithium atoms from the ground state to a highly-excited state.…”

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Two-photon excitation of ultracold atoms to Rydberg states

Saakyan

Sautenkov

Vilshanskaya

et al. 2015

J. Phys.: Conf. Ser.

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Abstract. In this work, we discuss two-photon excitation and diagnostic of ultracold Rydberg atoms in a magneto-optical trap. Lithium atoms were excited by using ultraviolet cw laser. For identification of Rydberg transitions, we recorded resonance fluorescence of ultracold atoms. Spectra of transitions 2P-nS, 2p-nD were measured. Our results are in good agreement with calculations and experimental data available in literature. Presented work is a part of our project focused on preparation and study of Rydberg matter and ultracold plasma.Our research project is focused on study of a Rydberg matter and non-ideal plasma [1,2]. Results of the research can be useful for fundamental physics and for some applications as quantum computers. Atoms can be optically transferred to definite Rydberg states by twophoton or multi-photon excitation processes [3,4]. The problem is to diagnose highly-excited states. In addition to the traditional approach, induced ionization of Rydberg atoms by applied electric field [2], recently EIT [5] and FWM [6] techniques have been used for identification of the Rydberg transitions. As the first step in our research project we have performed cw two-step excitation of ultracold lithium atoms from the ground state to a highly-excited state. In the current paper we describe our experimental setup and observation of the Rydberg transitions in lithium atoms in magneto-optical trap (MOT). A basic description of the MOT for lithium atoms is presented in [7]. Our vacuum system is similar to an experimental apparatus which used in laboratory of A. Turlapov for investigation of the Fermi gas of 6 Li atoms [8]. The atomic transitions, which participated in excitation of Rydberg states, are shown in figure 1.Optical transitions in D 2 line are used for optical cooling and trapping of lithium atoms. Optical transitions in D 1 line are used for absorption measurements of an atomic cloud in MOT by using a weak probe laser. In figure 1 a blue arrow shows an ultraviolet transition (350 nm) from the excited state 2P 3/2 to highly excited states.In our laboratory an experimental setup for trapping and ultraviolet excitation of 7 Li atoms is assembled. Our setup is described in [9][10][11]. It consists of vacuum and optical systems. The vacuum system includes an oven (the source of a thermal atomic beam), a Zeeman slower, and a main vacuum chamber (residual air pressure < 10 −9 mbar), where 7 Li atoms are trapped.In the optical part of the setup we use two amplified external cavity diode lasers (ECDL) for the cooling and trapping of 7 Li atoms. One of them is the cooling laser, which is slightly detuned from the cycling transition 2S 1/2 (F = 2)-2P 3/2 (F ′ = 3). This laser is locked to the thermally stabilized reference cavity with tunable transmission resonances. The other laser is repump laser ELBRUS 2015

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Front Matter

2011

Fundamentals of Ionized Gases

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The Physics of Non-Ideal Plasma

Cited by 104 publications

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Thermal Radiation from Nanoparticles

Thermal Radiation from Nanoparticles

Two-photon excitation of ultracold atoms to Rydberg states

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