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RISS 인기검색어
- 검색키워드
- 저자 : Sebban, S. (검색결과 3 건)
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Toward compact and ultra-intense laser-based soft x-ray lasers
Sebban, S,Depresseux, A,Oliva, E,Gautier, J,Tissandier, F,Nejdl, J,Kozlova, M,Maynard, G,Goddet, J P,Tafzi, A,Lifschitz, A,Kim, H T,Jacquemot, S,Rousseau, P,Zeitoun, P,Rousse, A IOP 2018 Plasma physics and controlled fusion Vol.60 No.1
<P>We report here recent work on an optical field ionized (OFI), high-order harmonic-seeded EUV laser. The amplifying medium is a plasma of nickel-like krypton obtained by OFI when focusing a 1 J, 30 fs, circularly-polarized, infrared pulse into a krypton-filled gas cell or krypton gas jet. The lasing transition is the 3d<SUP>9</SUP>4d (<I>J</I>?=?0)?→?3d<SUP>9</SUP>4p (<I>J</I>?=?1) transition of Ni-like krypton ions at 32.8 nm and is pumped by collisions with hot electrons. The gain dynamics was probed by seeding the amplifier with a high-order harmonic pulse at different delays. The gain duration monotonically decreased from 7 ps to an unprecedented shortness of 450 fs full width at half-maximum as the amplification peak rose from 150 to 1200 with an increase of the plasma density from 3?×?10<SUP>18</SUP> to 1.2?×?10<SUP>20</SUP> cm<SUP>−3</SUP>. The integrated energy of the EUV laser pulse was also measured, and found to be around 2 <I>μ</I>J. It is to be noted that in the ASE mode, longer amplifiers were achieved (up to 2 cm), yielding EUV outputs up to 14 <I>μ</I>J.</P>
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Tali Seger-Guttmann,Shaked Gilboa,Judith Partouche-Sebban 글로벌지식마케팅경영학회 2018 Global Marketing Conference Vol.2018 No.07
In recent years, terrorism has become one of the major world's concerns. According to the Institute for Economics and Peace (2016), among OECD member countries, deaths from terrorism have dramatically increased in 2015, rising by 650% relative to 2014. France stands as the country with the largest increase of deaths from 2014 to 2015. Recent terrorist attacks in France have triggered widespread awareness of this tragic phenomenon. Comparatively, Israel is a country that has experienced chronic terror attacks since the early 1960s, creating a high level of awareness that has become part of the citizen’s daily life, as attacks can occur in restaurants, bars, buses, and stores, or in the streets (Ben-David & Cohen-Louck, 2010). Due to their different experiences of terror, we chose to focus our study on France and Israel. In line with the terror management theory (Greenberg et al., 1986), which suggests that death reminders influence behaviors, these terror threats may have consequences on feelings of well-being (Maguen et al., 2008). Most studies concerning the effects of terrorism on consumer behaviour have focused on personal characteristics (Cohen-Louck, 2016). However, to the best of our knowledge, studies have yet to characterize customers' behaviors in different service situations in the wake of a terrorist attack and the factors influencing these behaviors. This will be the main contribution of the current study. A qualitative study has been conducted in France and Israel. We focused on both utilitarian (modes of transportation) and hedonic (cinema, restaurants, bars) services (Bradley & LaFleur, 2016). The study highlighted two specific criteria that could affect customer behavior: time from the terrorist attack and its proximity to the respondent. In-depth interviews were conducted with customers from France (22) and Israel (29; total n=51). Participants were interviewed on their behaviors, either immediately following a terror attack or one month after. Customer strategies were found to be similar and long termed in both France and Israel. However, Israeli customer responses are more personal and emotional, more detailed, more proactive in protecting themselves. The passage of time from the attack has less effect on Israelis’ chosen strategies. Among French respondents, the effect of time is evident: attacks have a significant impact on behaviours immediately after their occurrence, compared with a month later. Whereas the avoidance strategy is mainly adopted immediately after the attack, as time passes, there is a kind of resignation of the situation. The perception of internal vs. external control over one's life seems also to be an important variable that may explain behaviour in both groups.
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Demonstration of a Circularly Polarized Plasma-Based Soft-X-Ray Laser
Depresseux, A.,Oliva, E.,Gautier, J.,Tissandier, F.,Lambert, G.,Vodungbo, B.,Goddet, J-P.,Tafzi, A.,Nejdl, J.,Kozlova, M.,Maynard, G.,Kim, H. T.,Phuoc, K. Ta,Rousse, A.,Zeitoun, P.,Sebban, S. American Physical Society 2015 Physical review letters Vol.115 No.8
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