Availability: Construction and operation of a cryogenic source for cold polar molecules

Construction and operation of a cryogenic source for cold polar molecules:

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Bibliographic Details
Main Author:	Sommer, Christian (Author)
Format:	Thesis/Dissertation Book
Language:	English
Published:	2011
Subjects:	Teilchenquelle Kaltes Molekül Polares Molekül Tieftemperatur Teilchenstrahl Hochschulschrift
Links:	http://mediatum.ub.tum.de/node?id=1071797 https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20110607-1071797-1-2 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024178577&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
Physical Description:	X, 145 S. Ill., graph. Darst.

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adam_text	IMAGE 1 TECHNISCHE UNIVERSITAET MUENCHEN MAX-PLANCK-INSTITUT FUER QUANTENOPTIK CONSTRUCTION AND OPERATION OF A CRYOGENIC SOURCE FOR COLD POLAR MOLECULES CHRISTIAN SOMMER VOLLSTAENDIGER ABDRUCK DER VON DER FAKULTAET FUER PHYSIK DER TECHNISCHEN UNIVERSITAET MUENCHEN ZUR ERLANGUNG DES AKADEMISCHEN GRADES EINES DOKTORS DER NATURWISSENSCHAFTEN (DR. RER. NAT.) GENEHMIGTEN DISSERTATION. VORSITZENDER : UNIV.-PROF. DR. H. FRIEDRICH PRUEFER DER DISSERTATION : 1. HON.-PROF. DR. G. REMPE 2. UNIV.-PROF. DR. R. KIENBERGER DIE DISSERTATION WURDE AM 11.04.2011 BEI DER TECHNISCHEN UNIVERSITAET MUENCHEN EINGEREICHT UND DURCH DIE FAKULTAET FUER PHYSIK AM 19.05.2011 ANGENOMMEN. BIBLIOGRAFISCHE INFORMATIONEN HTTP://D-NB.INFO/101406287X DIGITALISIERT DURCH IMAGE 2 CONTENTS ABSTRACT V ZUSAMMENFASSUNG VI 1 INTRODUCTION 1 1.1 COLD MOLECULES 1 1.2 ULTRACOLD MOLECULES 3 1.3 PRODUCTION OF COLD MOLECULES 4 1.4 THIS THESIS 7 2 THEORY OF MOLECULES AND THEIR INTERACTION WITH AN EXTERNAL ELECTRIC FIELD 9 2.1 THE MOLECULAR HAMILTONIAN 9 2.2 THE RIGID ROTOR 12 2.2.1 SYMMETRIC TOP MOLECULES 12 2.2.2 ASYMMETRIC TOP MOLECULES 15 2.3 THE RESPONSE OF A NEUTRAL MOLECULE TO AN EXTERNAL ELECTRIC FIELD . . .. 19 2.4 STARK INTERACTION OF A RIGID ROTATING MOLECULE 20 2.4.1 STARK EFFECT FOR SYMMETRIC TOP MOLECULES 21 2.4.2 STARK EFFECT FOR ASYMMETRIC-TOP MOLECULES 27 3 ELECTRIC GUIDING AND PRODUCTION OF VELOCITY-SELECTED MOLECULAR PULSES 29 3.1 TRAPPING POLAR MOLECULES 30 3.2 VELOCITY FILTERING WITH AN ELECTRIC GUIDE 32 3.3 FLUX OF GUIDED MOLECULES 33 3.4 EXPERIMENTAL SETUP 34 3.5 CONTINUOUS GUIDED BEAM 36 3.6 VELOCITY-SELECTED MOLECULAR PULSES 37 3.6.1 VELOCITY-SELECTION SCHEME 37 3.6.2 FORMATION OF MOLECULAR PULSES 39 3.6.3 THE WIDTHS OF THE VELOCITY DISTRIBUTIONS 43 3.6.4 TRANSVERSE VELOCITY DISTRIBUTION OF VELOCITY-SELECTED MOLECULAR PULSES 46 IMAGE 3 3.7 SUMMARY 49 4 SLOW MOLECULES E X T R A C T ED FROM A CRYOGENIC SOURCE 51 4.1 THEORY OF BUFFER-GAS COOLING 52 4.1.1 TRANSLATIONAL THERMALIZATION 52 4.1.2 ROTATIONAL RELAXATION AND ROTATIONAL STATE POPULATION 55 4.1.3 MOLECULAR BEAMS EMERGING FROM A BUFFER-GAS SOURCE 60 4.2 EXPERIMENTAL SETUP 63 4.2.1 CRYOGENIC SYSTEM 65 4.2.2 BUFFER-GAS CELL AND GAS SUPPLY SYSTEM 68 4.2.3 ELECTRIC GUIDE 72 4.2.4 ULTRAHIGH-VACUUM CHAMBER AND DIFFERENTIAL PUMPING 73 4.2.5 DATA ACQUISITION 74 4.3 FLUX AND DENSITY CALIBRATION 74 4.3.1 GAS LINE CALIBRATION 74 4.3.2 GUIDED FLUX CALIBRATION 75 4.4 OPTIMIZATION OF THE SOURCE 77 4.4.1 FLUX OPTIMIZATION 77 4.4.2 RUNTIME OPTIMIZATION 80 4.5 INTERNAL COOLING 81 4.5.1 QUALITATIVE MEASUREMENT 81 4.5.2 QUANTITATIVE MEASUREMENT BY DEPLETION SPECTROSCOPY 85 4.6 COLD BEAMS OF DIFFERENT MOLECULAR SPECIES 92 4.7 STABILITY OF THE COLD BEAM 97 4.8 APPLICATIONS 99 4.8.1 BUFFER-GAS COOLING WITH NEON 100 4.8.2 VELOCITY-SELECTED MOLECULAR PULSES FROM THE COLD BEAM 100 4.8.3 REACTIONS AT LOW TEMPERATURES 101 4.9 OPERATION OF THE CRYOGENIC SOURCE IN THE HYDRODYNAMIC REGIME . . .. 105 4.10 SUMMARY 108 5 OUTLOOK 109 A THEORETICAL A S P E C TS OF POLAR MOLECULES IN A QUADRUPOLE GUIDE 111 A.I ELECTRIC GUIDING POTENTIAL I LL A.2 MOLECULAR TRAJECTORIES IN A QUADRUPOLE GUIDE 112 A.3 DISTRIBUTIONS OF GUIDED MOLECULES FOR QUADRUPOLE BOUNDARY CONDITIONS 115 B NUCLEAR SPIN STATISTICS 119 B.I SYMMETRIC TOP WITH A THREEFOLD AXIS OF SYMMETRY 119 B.2 ASYMMETRIC TOP WITH A TWOFOLD AXIS OF SYMMETRY 122 C COLLISION THEORY 125 C.I COLLISION PROPERTIES OF ATOMS AND SYMMETRIC-TOP MOLECULES 125 VIII IMAGE 4 D ADDITIONAL PLOTS AND PICTURES 129 BIBLIOGRAPHY 133 LIST OF PUBLICATIONS 147 DANKSAGUNG 149 IX
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spellingShingle	Sommer, Christian Construction and operation of a cryogenic source for cold polar molecules Teilchenquelle (DE-588)4507954-7 gnd Kaltes Molekül (DE-588)7846007-4 gnd Polares Molekül (DE-588)4174979-0 gnd Tieftemperatur (DE-588)4134801-1 gnd Teilchenstrahl (DE-588)4165339-7 gnd
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title	Construction and operation of a cryogenic source for cold polar molecules
title_auth	Construction and operation of a cryogenic source for cold polar molecules
title_exact_search	Construction and operation of a cryogenic source for cold polar molecules
title_full	Construction and operation of a cryogenic source for cold polar molecules Christian Sommer
title_fullStr	Construction and operation of a cryogenic source for cold polar molecules Christian Sommer
title_full_unstemmed	Construction and operation of a cryogenic source for cold polar molecules Christian Sommer
title_short	Construction and operation of a cryogenic source for cold polar molecules
title_sort	construction and operation of a cryogenic source for cold polar molecules
topic	Teilchenquelle (DE-588)4507954-7 gnd Kaltes Molekül (DE-588)7846007-4 gnd Polares Molekül (DE-588)4174979-0 gnd Tieftemperatur (DE-588)4134801-1 gnd Teilchenstrahl (DE-588)4165339-7 gnd
topic_facet	Teilchenquelle Kaltes Molekül Polares Molekül Tieftemperatur Teilchenstrahl Hochschulschrift
url	http://mediatum.ub.tum.de/node?id=1071797 https://nbn-resolving.org/urn:nbn:de:bvb:91-diss-20110607-1071797-1-2 http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=024178577&sequence=000001&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA
work_keys_str_mv	AT sommerchristian constructionandoperationofacryogenicsourceforcoldpolarmolecules

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