August 2016 - Vip-all.phys

[vip-all] Talents
by Ulrik Ingerslev Uggerhøj 21 Jun '18

21 Jun '18

Dear all, As a follow-up for the residential meeting at Vejle, before which I only had response from 2 groups, I kindly ask you to - groupwise, if possible - inform me in writing about your planned activities in connection with talent students: "Please also take responsibility for organizing suggestions for host groups for “Talent students” (i.e. students being admitted to the talent program from their second year); such groups may consist of the entire topical group or one or more subgroups." Please include in your (preferably brief) response which (sub-)groups you suggest, 5-10 keywords about the scientific content, and a bit about which competencies you expect the talent students may obtain from your programme (both the 'soft' such as presentation skills, and the 'hard' such as programming in LabVIEW), and a suggestion for the final evaluation, to be done at the end of the 1/2 year (which product?). Mvh. Ulrik ************ Ulrik I. Uggerhøj Department of Physics and Astronomy Aarhus University Ny Munkegade 120 DK-8000 Aarhus Denmark Mobile: +45 2338 2373 e-mail: ulrik(a)phys.au.dk

1 4

[vip-all] Børnejuletræsfest/Children's Christmas Party
by Ann-Berit Porse Stærkær 11 Nov '16

11 Nov '16

Kære alle Sidste år genoplivede vi traditionen med børnejuletræsfest. Vi gentager den hyggelige begivenhed og afholder festen Tirsdag den 9. december 2014 kl. 16.00 i Fysisk Kantine Se den vedhæftede invitation og husk at tilmeldingsfristen er den 28. november. Vi håber at se rigtig mange kolleger, børn og børnebørn til en hyggelig eftermiddag. Med venlig hilsen PS! Personale og studerende ved IFA og ISA Dear all, Last year we reintroduced the "Children's Christmas Party " tradition. We repeat the cosy event and the party will be held Tuesday the 9th of December 2014 at 16.00 in Fysisk Kantine Please see the attached invitation (in Danish only) and remember that the deadline for sign-up is 28th of November. Sign up and pay with Birthe at the Information desk. We hope to see many colleagues, children and grandchildren to an afternoon filled with Danish "hygge". Best regards, PS! Personale og studerende ved IFA og ISA

1 2

[vip-all] Lecture by the 2016 Honorary Doctor at Science and Technology, AU - Paul Corkum
by Grete Flarup 24 Aug '16

24 Aug '16

Lecture by the 2016 Honorary Doctor at Science and Technology, AU Paul Corkum Joint Attosecond Science Lab University of Ottawa and National Research Council of Canada Thursday September 8, AUD I, 1514-213, 15:15 (coffee in the foyer at 15:00) Probing quantum systems from the inside - on the attosecond time scale Attosecond pulses are generated by electrons that are extracted from a quantum system by tunneling in an intense light pulse and travel through the continuum. Portions of each electron wave packet are forced to re-collide with its parent ion by the oscillating force of the time dependent electric field from the light pulse. Upon re-collision, the electron and ion can recombine, emitting VUV or soft X-ray radiation. Since nonlinear optics underlies every ultrafast pulse that we create and every ultrafast measurement that we perform in chemistry, physics or biology, a new nonlinear process is bound to be important. If we ensure that the intense driving pulse only permits re-collision within a fraction of a light period, in rare gas atoms re-collision generates the world's shortest pulses (currently ~ 65 x 10-18 sec). If we use a mid-infrared driver pulse, it can also generate coherent soft X-ray radiation by combining 1000s of infrared photons into one with photon energy > 1 keV. But the re-collision electron, with wavelength in the 3-0.3 Ångstrøm range, is also a probe of structure. In semiconductors we can measure the band structure of the material in which the process occurs. Band structure information is encoded in the emitted light - effectively an inverse photoelectron spectroscopy. Using small molecules, the emitted spectrum contains the information needed to image the structure of the wave function of the orbital (or orbitals) from which the re-collision electron was taken. As time permits the talk will cover these issues. [http://canadajournal.net/wp-content/uploads/2015/09/Paul-Corkum-University-…] Henrik Stapelfeldt

1 0

[vip-all] workshop on datataking-control-automation at Dept. of Physics and Astronomy on September 21, 12-16.30
by Søren Pape Møller 24 Aug '16

24 Aug '16

INVITATION to workshop on data-taking/control/automation and H/S-ware at Dept. of Physics and Astronomy September 21, 12.00-16.30 in 1525-626 Inspired among others by our chairman, and by recent initiatives by the electronics/ASTRID group to replace/upgrade of old (25 years +) parts of the ASTRID control system and by the electronics/STM group to replace/upgrade Aarhus STM FPGA systems (10 years +), we are inviting you to a ½ day workshop on data-taking/control/automation hard- and soft-ware. At this first (?) meeting, we invite all interested groups at IFA to present briefly (max 15 min + 5 min discussions) their present and future data-taking/control/automation hard- and soft-ware. We foresee presentations to include keywords like Realtime systems, embedded systems, DAQ-cards, EtherCAT, Bechhoff, TwinCAT, PLC, VHDL, FPGA, ARM9, National Instruments, CompactRIO, LabView, MatLab, (CAMAC), FastBus, VME. Everybody is welcome, but we foresee only one contribution by each relevant group. At this initial meeting, we only aim to inform each other about activities going on and maybe inspire and collaborate, but future meetings can be envisaged. An additional future outcome might also be that we, the electronics group on the 4'th floor, would advocate on a specific solution, where at least some support can be given in the future. Questions, comments and details about your participation (group and possible presentation) to me. Best regards Søren Pape Møller PS: Some catering will be provided; more details later!

1 0

[vip-all] Two excellent seminars on ultrafast science
by Grete Flarup 18 Aug '16

18 Aug '16

Two excellent seminars on ultrafast science Thursday August 25 in 1525-626 14:00-14:45: Attosecond probing of electron correlation in xenon by two-color driven high-order harmonic generation Caterina Vozzi, Department of Physics, Politecnico Milano, Italy 14:45-15:00 Discussion 15:00-15:20: Coffee and cake 15:20-16:05: Attosecond science with gases and liquids: From the extreme ultraviolet to soft X-rays Hans Jakob Wörner, Laboratory of Physical Chemistry, ETH Zürich, Switzerland 16:05-16:20: Discussion Lars Bojer Madsen and Henrik Stapelfeldt [cid:image005.jpg@01D1F95E.D282BB00] [http://www.nccr-must.ch/libraries.bilder/woerner1.jpg] Attosecond probing of electron correlation in xenon by two-color driven high-order harmonic generation Caterina Vozzi Department of Physics, Politecnico Milano, Italy High-order harmonic generation (HHG) is a sensitive probe of atomic and molecular structures. Recently this research field greatly benefited from the exploitation of mid-IR driving pulses that allowed the extension of the harmonic emission to higher photon energies, giving access to several phenomena previously unexplored with this technique, such as the giant resonance in xenon. This enhancement in the harmonic generation yield around 100 eV has been interpreted in terms of the electronic structure of xenon, suggesting the key role of single and multi-electron contributions to the harmonic generation process. In our work, we exploited HHG by a two-color field, combining this powerful experimental approach with a mid-IR driving source, providing the evidence of a deviation of the xenon response with respect to the expected atomic behavior which is interpreted as the fingerprint of electron correlation effects. Attosecond science with gases and liquids: from the extreme ultraviolet to soft X-rays Hans Jakob Wörner Laboratory of Physical Chemistry, ETH Zürich, Switzerland The ultrafast motion of electrons and holes following light-matter interaction is fundamental to a broad range of chemical and biophysical processes. In this lecture, I will discuss two recent experiments carried out in our group that measure the atomic-scale motion of charge with attosecond temporal resolution (1 as = 10-18s). The first experiment is carried out on isolated, spatially oriented molecules in the gas phase. We advance high-harmonic spectroscopy to resolve spatially and temporally the migration of an electron hole immediately following ionization of iodoacetylene, while simultaneously demonstrating extensive control over the process. A multidimensional approach, based on the measurement of both even and odd harmonic orders, enables us to reconstruct both quantum amplitudes and phases of the electronic states with a resolution of ~100 as. We separately reconstruct quasi-field-free and laser-controlled charge migration as a function of the spatial orientation of the molecule and determine the shape of the hole created by ionization [1]. The second experiment is carried out on a free-flowing microjet of liquid water. We use an attosecond pulse train synchronized with a near-infrared laser pulse to temporally resolve the process of photoemission from liquid water using the RABBIT technique. We measure a delay on the order of 50 as between electrons emitted from the HOMO of liquid water compared to that of gas-phase water and a substantially reduced modulation contrast of the corresponding sidebands. Since our measurements on solvated water molecules are referenced to isolated ones, the measured delays reflect the delays caused by electron transport through the aqueous environment. The relative modulation contrast, in turn, contains information on dephasing processes. These experiments make the liquid phase and its fascinating mechanisms accessible to attosecond time-resolved measurements [2]. [1] P. M. Kraus, B. Mignolet, D. Baykusheva, A. Rupenyan, L. Horny, E. F. Penka, G. Grassi, O. I. Tolstikhin, J. Schneider, F. Jensen, L. B. Madsen, A. D. Bandrauk, F. Remacle, and H. J. Wörner, Science 350, 790 (2015). [2] I. Jordan, M. Huppert, M. Peper, A. von Conta, L. Seiffert, Th. Fennel and H.J. Wörner, to be published.

1 0

[vip-all] studenter job søges
by Søren Pape Møller 17 Aug '16

17 Aug '16

Kære alle, Tillad mig ad denne vej at anbefale Federico Andreatta til et studenterjob her eller andetsteds. Forslag bedes venligst sent til Federico, som angivet i hans "jobannonce" nedenfor. Federico har været ansat til manuelt arbejde hos os i en periode, hvor vi lærte ham at kende som en venlig og ansvarsfuld person, Med venlig hilsen Søren Pape Møller ----------------------------------------------------------------------------------------------- I am Federico Andreatta. I am from Italy and I came in Aarhus University to do my bachelor project under the supervision of prof. Philip Hoffman. Right after, I joined the master program in Nanoscience and in the same time I have been working as "academic employee" at the beamline SGM-3 at the synchrotron radiation source ASTRID2 at the department of Physics and Astronomy. I will start my master thesis with the same group from September 2016. I am seeking work as student helper in any kind of job/activities related or not to physics/chemistry as a part-time job during the next academic year. If you want to contact me, my phone number and my email address are: 53336136 - federicoandreatta92(a)gmail.com<mailto:federicoandreatta92@gmail.com>. Thanks in advance, Federico Andreatta

1 0

[vip-all] Axels Svanes begravelse
by Ruth Laursen 17 Aug '16

17 Aug '16

Kære alle Axel Svane skal begraves på tirsdag den 23. kl 14.00 i Tamdrup kirke (Tamdrup Kirkevej 1, 8700 Horsens). Alle der måtte have lyst er velkomne og der vil være sammenkomst bagefter på Brædstrup kro. Vh ruth ******************************* Ruth Laursen Grabe Head of Department Administration Department of Physics and Astronomy Aarhus University Ny Munkegade 120 8000 Aarhus C Denmark e-mail: ruth(a)phys.au.dk<mailto:ruth@phys.au.dk> Office: 1520-317 Mobile: + 45 2338 2335

1 0

Re: [vip-all] Undervisning/teaching
by Allan Hvidkjær Sørensen 16 Aug '16

16 Aug '16

FYI /Allan ________________________________ Fra: Allan Hvidkjær Sørensen Sendt: 16. august 2016 15:59 Til: phd-all.phys(a)maillist.au.dk Cc: Trolle René Linderoth; Maria Kragelund; Ann-Berit Porse Stærkær; Ann-Kirstine Jørgensen; Susanne Elisabeth Nørskov Emne: Undervisning/teaching Kære PhD-studerende, Vedhæftet liste over fordelingen af instruktorater mv. for det forestående undervisningsår. Bemærk venligst, at angivelserne for foråret er foreløbige og ufuldstændige. v.h. Allan Dear PhD-student, A list with teaching assignments for the academic year 2016/2017 is enclosed. Please note that the entries for the spring are preliminary and incomplete. v.h. Allan

1 0

[vip-all] Fra institutlederen: Axel Svane
by Ruth Laursen 16 Aug '16

16 Aug '16

[Axel Svane] Lektor Axel Svane døde mandag eftermiddag efter længere tids kamp med sygdom. Instituttet har således mistet en af vore medarbejdere som var yderst værdsat både blandt kolleger og studerende. Axel Svane var en internationalt yderst velrenommeret forsker. Han beskæftigede sig hovedsageligt med teoretisk faststoffysik, design af nye strukturer, supergitre, legeringer af halvledere og metaller og forudsigelse af deres optiske og mekaniske egenskaber. Endvidere var Axel specialist i materialers magnetiske egenskaber, hvilket sammen med hans dybe interesse for relativitetsteori også prægede hans højt værdsatte undervisning. Axel har altid været central medarbejder på Instituttet, og selv sagde han at "IFA har været min halve identitet" - vi vil savne ham. Venlig hilsen Lars

1 0

[vip-all] The 23rd European Conference on Few Body Problems in Physics
by Karin Vittrup 04 Aug '16

04 Aug '16

Dear all The 23rd European Conference on Few Body Problems in Physics will be held at the mathematics department from Monday the 8th to Friday the 12th of August. Please feel free to join us for one or more talks if you are interested. You can find the program of the conference on the conference website: http://users-phys.au.dk/efb23/home.php Keep in mind that registration is now closed and so the social parts of the program (coffee breaks, lunch and dinner) are full. Best regards EFB23 Local Organizing Committee

1 0