A Stark decelerator for ammonia molecules

Slides:

Advertisements

Similar presentations

FC-MS from Teledyne Isco CombiFlash ® a Name You Can Rely On.

Advertisements

Applications of photoelectron velocity map imaging at high resolution or Photoionization dynamics of NH 3 (B 1 E  ) Katharine L. Reid (Paul Hockett, Mick.

Marina Quintero-Pérez Paul Jansen Thomas E. Wall Wim Ubachs Hendrick L. Bethlem.

Results The optical frequencies of the D 1 and D 2 components were measured using a single FLFC component. Typical spectra are shown in the Figure below.

PRISMAS PRISMAS PRobing InterStellar Molecules with Absorption line Studies M. Gerin, M. Ruaud, M. de Luca J. Cernicharo, E. Falgarone, B. Godard, J. Goicoechea,

Intense Field Femtosecond Laser Interactions AMP TalkJune 2004 Ultrafast Laser Interactions with atoms, molecules, and ions Jarlath McKenna Supervisor:

Condensed phase vs. Isolated gas phase spectra Solution phase A A A A A A W W W W W WW W W W W W W W W W W W: water A: sample ( nm) ( nm) Isolated.

Hyperfine Studies of Lithium using Saturated Absorption Spectroscopy Tory Carr Advisor: Dr. Alex Cronin.

Excited state spatial distributions Graham Lochead 20/06/11.

Laser-induced vibrational motion through impulsive ionization Grad students: Li Fang, Brad Moser Funding : NSF-AMO October 19, 2007 University of New Mexico.

Diagnosis of a benzene discharge with a mass-selective spectroscopic technique Felix Güthe, Hongbin Ding, Thomas Pino and John P. Maier Institute of Physical.

HIGH RESOLUTION INFRARED SPECTROSCOPY OF N 2 O-C 4 H 2 AND CS 2 −C 2 D 2 DIMERS MAHDI YOUSEFI S. SHEYBANI-DELOUI JALAL NOROOZ OLIAEE BOB MCKELLAR NASSER.

Stefan Truppe MEASUREMENT OF THE LOWEST MILLIMETER- WAVE TRANSITION FREQUENCY OF THE CH RADICAL.

TOF Mass Spectrometer &

ArXiv: Optical pulse-shaping for internal cooling of molecules Optical pulse-shaping for internal cooling of molecules Chien-Yu Lien, Scott Williams,

Towards High Resolution Cavity Enhanced Spectroscopy with Fast ion Beams Andrew Mills, Brian Siller, Manori Perera, Holger Kreckel, Ben McCall.

Mass spectrometry Ions are analyzed on the basis of their m/z Chlorine has 2 isotopes, 35 Cl and 37 Cl, in the approximate ratio of 3 :1. Electrons are.

IR spectroscopy of first-row transition metal clusters and their complexes with simple molecules FELIX facility, Radboud University Nijmegen, the Netherlands.

Magnetic Pulsed Valve 1.The valve opens and shuts Rotating Disk He Pulsed Valve Lens to focus the laser beam.

Evidence of Radiational Transitions in the Triplet Manifold of Large Molecules Haifeng Xu, Philip Johnson Stony Brook University Trevor Sears Brookhaven.

Determination of fundamental constants using laser cooled molecular ions.

Funded by: NSF Timothy C. Steimle, Fang Wang a Arizona State University, USA & Joe Smallman b, Physics Imperial College, London a Currently at JILA THE.

Novel Approaches to Doppler-Free Ion Imaging I. Two-Color Reduced-Doppler Imaging II. Doppler-Free/Doppler-Sliced Imaging Cunshun Huang, Wen Li, Sridhar.

Instrumentation in the Molecular Physics Group Presented by: Mats Larsson.

PROTON TRANSFER IN NEUTRAL PEPTIDES EXAMINED BY CONFORMATIONAL SPECIFIC IR/UV SPECTROSCOPY Sander Jaeqx 67th International Symposium on Molecular Spectroscopy.

Two-Focus Fluorescence Correlation　 Spectroscopy: A New Tool for Accurate and Absolute Diffusion Measurements Jörg Enderlein et al., ChemPhysChem, 8, 433–443.

Physique des Lasers, Atomes et Molécules

Stefan Truppe MM-Wave Spectroscopy and Determination of the Radiative branching ratios of 11 BH for Laser Cooling Experiments.

Molecular Deceleration Georgios Vasilakis. Outline  Why cold molecules are important  Cooling techniques  Molecular deceleration  Principle  Theory.

Experiments with Stark-decelerated and trapped polar molecules Steven Hoekstra Molecular Physics Department ( Gerard Meijer) Fritz-Haber-Institutder Max-Planck-Gesellschaft.

Looking for trees in the forest LION, BM Seminar 5 June 2008 Ruth Buning (LCVU, Amsterdam) Wim Ubachs (LCVU, Amsterdam) Michael Murphy (Swinburne University,

Toward a Stark Decelerator for atoms and molecules exited into a Rydberg state Anne Cournol, Nicolas Saquet, Jérôme Beugnon, Nicolas Vanhaecke, Pierre.

ISMS Symposium Champaign-Urbana, 19 June 2014 Wim Ubachs VU University Amsterdam Effelsberg Search for a variation of the proton-electron mass ratio from.

Photodissociation in Astrochemistry Leiden, 5 Feb. 2015

ISMS-Conference Champaign-Urbana, 19 June 2014 Wim Ubachs VU University Amsterdam VLT PDA-XUV High-resolution molecular spectroscopy of H 2 at 10% the.

IR spectra of Methanol Clusters (CH3OH)n Studied by IR Depletion and VUV Ionization Technique with TOF Mass Spectrometer Department of Applied Chemistry.

AGS/Booster PP Setup Status Feb. 5, 2013 Time Meeting Haixin/Vincent.

Daisuke Ando, * Susumu Kuma, ** Masaaki Tsubouchi,** and Takamasa Momose** *Kyoto University, JAPAN **The University of British Columbia, CANADA SPECTROSCOPY.

Optical Stark Spectroscopy and Hyperfine study of Gold Chrolride (AuCl) Ruohan Zhang and Timothy C. Steimle International Symposium on Molecular Spectroscopy.

Results using atomic targets Suppression of Nonsequential ionization from an atomic ion target (comparison of double ionization of Ar and Ar + ). Determination.

QSO absorption spectra and  -variation Group meeting 2 July 2007 Ruth Buning, Wim Ubachs, Michael Murphy, Lex Kaper, Huib Henrichs, Piet Mulders.

Seeing the trees in the forest Group meeting 10 December 2007 Ruth Buning, Wim Ubachs, Michael Murphy, Lex Kaper.

Jim got me some money yet again to come to the Austin conference in Easter 1984.

A Stark decelerator for ammonia molecules Ruth Buning Master research project February 23, 2007.

Cosmological variation of the proton-to-electron mass ratio and the spectrum of H 2 Ruth Buning Bachelor project 2004.

Recent development of the Supersonic Gas-Jet Beam profile monitor

Production of vibrationally hot H 2 (v=10–14) from H 2 S photolysis Mingli Niu.

Rick Smalley Magnetic Pulsed Valve Hole for the laser pulse.

Development of a Fast Ion Beam Spectrometer for Molecular Ion Spectroscopy Departments of Chemistry and Astronomy University of Illinois at Urbana-Champaign.

Initial Development of High Precision, High Resolution Ion Beam Spectrometer in the Near- Infrared Michael Porambo, Brian Siller, Andrew Mills, Manori.

Looking for trees in the forest Diavolezza meeting feb Ruth Buning (LCVU, Amsterdam) Wim Ubachs (LCVU, Amsterdam) Michael Murphy (Swinburne University,

1 m Tungsten Carbide Spectroscopy for electron EDM Measurement Jeongwon Lee June 23, 2011 Jinhai Chen, and Aaron E. Leanhardt Department of Physics, University.

SCRIBES Sensitive Cooled Resolved Ion BEam Spectroscopy

The Performance Of A Continuous Supersonic Expansion Discharge Source

The Performance Of A Continuous Supersonic Expansion Discharge Source

Alternate Gradient deceleration of large molecules

Mid-IR Direct Absorption/Dispersion Spectroscopy of a Fast Ion Beam

Electronic spectroscopy of trapped PAH photofragments

Laser induced fluorescence of tetracene in hydrogen droplets

Doppler-free two-photon absorption spectroscopy of vibronic excited states of naphthalene assisted by an optical frequency comb UNIV. of Electro-Communications.

A molecular fountain Cunfeng Cheng

MOLECULAR BEAM OPTICAL ZEEMAN SPECTROSCOPY OF VANADIUM MONOXIDE, VO

THE STRUCTURE OF PHENYLGLYCINOL

Progress In The Development Of An Infrared Ion Beam Spectrometer

Rick Bethlem Laser Centre Vrije Universiteit

(1+1)-REMPI spectra of initially oriented, surface-scattered molecules

OBSERVATION OF LEVEL-SPECIFIC PREDISSOCIATION RATES IN S1 ACETYLENE

National Institute for Environmental Studies, Tsukuba, Japan

Physics beyond the Standard Model from molecular hydrogen; Part I

Presentation transcript:

A Stark decelerator for ammonia molecules Ruth Buning Master research project LCVU Amsterdam Supervisor: Rick Bethlem

Motivation High resolution spectroscopy Collisions Variation of constants of nature Collisions

Motivation High resolution spectroscopy Ammonia, NH3 Proton-electron mass ratio m=me/mp

Motivation Variation of m=me/mp On a cosmological timescale: Compare H2 spectra of different epochs: Lab today QSO 12 Gyr ago

Reinhold et al, PRL 96 (2006) 151101 Ubachs et al, JMS 241 (2007) 155

Motivation Variation of m=me/mp In the lab: Compare ‘clocks’ Sensitivity to me/mp Comparison time Accuracy Ammonia NH3 Ceasium Cs

High resolution spectroscopy Transit-time broadening

Even higher resolution.. Fountain, clock

How can we produce and detect as much slow NH3 as possible? The Stark decelerator How can we produce and detect as much slow NH3 as possible?

Dipole in E field Stark shift:

Stark shift in ammonia Low-field seekers High-field seekers

Dipole in E field (2)

Deceleration Also: transverse focusing

Setup

Molecular beam Pulsed beam Supersonic expansion Few % NH3 in Xe Valve cooling

The decelerator

Time to switch

Time to switch

Detection 2+1 REMPI Resonance Enhanced Multi Photon Ionization

Measurements Wavelength scan TOF (time of flight) scan

Spectrum Low field seeking state Decelerator off Decelerator at 3 kV

TOF profile

TOF profile

TOF profile

Optimization Beam quality Detection efficiency Ammonia percentage Temperature valve Stagnation pressure Detection efficiency Laser power and focus

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature valve -50 oC Stagnation pressure 0.5 bar Detection efficiency Laser power and focus ~15 mJ/p

Slow ammonia (1) 100 m/s

Slow ammonia (2)

Conclusions Stark decelerator operational Down to 25 m/s Adaptations Differential pumping Focusing -> Molecular fountain

Fountain

Outline Why decelerate? Why ammonia? Neutral polar molecules in E fields The machine Slow ammonia

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature Backing pressure Valve opening Detection efficiency Laser power Laser focus

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature -50 oC Backing pressure Valve opening Detection efficiency Laser power Laser focus

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature -50 oC Backing pressure Valve opening Detection efficiency Laser power Laser focus

Backing pressure

Clusters

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature -50 oC Backing pressure 0.5 bar Valve opening Detection efficiency Laser power Laser focus

Valve opening

Optimization Beam quality Detection efficiency Ammonia percentage 5 % Temperature -50 oC Backing pressure 0.5 bar Valve opening Detection efficiency Laser power Laser focus

Laser power

Slow ammonia (2)

Slow ammonia (2)

Slow ammonia (2)

Slow ammonia (3)

Slow ammonia (3)

Slow ammonia (3)

Slow ammonia (3)