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						<h1 itemprop="headline">Specialized AMO seminar - Julian Glässel: Hybrid atom-ion trap for sympathetic cooling of OH-anions by a rubidium MOT</h1>
						
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														Monday  2  June 2014,
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														&nbsp;at 15:15 -  16:00
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														<span itemprop="name">Grete Flarup</span>
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									<p><strong>Speaker</strong>: Julian Glässel,&nbsp;Institute of Physics, University of Heidelberg
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<p><strong>Title</strong>: Hybrid atom-ion trap for sympathetic cooling of OH-anions by a rubidium MOT
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<p><strong>Abstra<img class="t3-TCEforms-reqImg" name="req_tt_news_108918_bodytext" src="clear.gif" alt>ct</strong>:
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<p>Ultracold molecular ions can be prepared by sympathetically cooling them in radio frequency (rf) traps [1]. Previous theories indicate that in rf traps homogeneously filled with atomic gas, sympathetic cooling of molecular ions is limited by a critical atom/ion mass ratio [2]. Recently we could analytically show that using localized atom clouds in higher order rf traps allows cooling beyond this mass ratio limitation. In this presentation I report on the status of a new setup [3] employing a hybrid atom-ion trap to sympathetically cool OH-anions with ultracold rubidium. Our setup consists of an octupole rf-trap of thin wires that has a large field-free center and allows enough optical access to overlay a magneto optical trap inside. Simulations of ion trajectories inside the ultracold rubidium cloud suggest sympathetic cooling by at least one order of magnitude.
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<p>[1] M. Schnell and G. Meijer, Angew. Chem. 121, 6124 (2009)<br>[2] F. G. Major and H. G. Dehmelt, Phys. Rev. 170, 91 (1968)<br>[3] J. Deiglmayr et. al., Phys. Rev. A 86, 043438 (2012)
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<p><em>Coffee + cake at 15:05</em></p>
								
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