Experiments with Supersonic Beams as a Source of Cold Atoms

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[61] Stanford Research Systems Inc., 1290-D Reamwood Avenue, Sunnyvale, CA 94089. www.thinksrs.com. [62] K. Kuhnke, K. Kern, R. David, and G. Comsa. High efficiency molecular- beam ionization detector with short ionization region. Review of Scientific Instruments, 65(11):3458–3465, nov 1994. [63] Mark Kasevich and Steven Chu. Atomic interferometry using stimulated raman transitions. Phys. Rev. Lett., 67(2):181–184, Jul 1991. [64] David M. Giltner, Roger W. McGowan, and Siu Au Lee. Atom interferom- eter based on bragg scattering from standing light waves. Phys. Rev. Lett., 75(14):2638–2641, Oct 1995. [65] P. Berman, editor. Atom Interferometry. Academic Press, San Diego, 1997. [66] John F. Clauser. Ultra-high sensitivity accelerometers and gyroscopes using neutral atom matter-wave interferometry. Physica B+C, 151(1):262 – 272, 1988. [67] R.J.Kaye,E.C.Cnare,M.Cowan,B.W. Duggin, R.J. Lipinski, B.M. Marder, G.M. Douglas, and K.J. Shimp. Design and performance of sandia’s contactless coilgun for 50 mm projectiles. Magnetics, IEEE Transactions on, 29(1):680 – 685, jan 1993. [68] E Narevicius, C G Parthey, A Libson, M F Riedel, U Even, and M G Raizen. Towards magnetic slowing of atoms and molecules. New Journal of Physics, 9(4):96, 2007. [69] E Narevicius, C G Parthey, A Libson, J Narevicius, I Chavez, U Even, and M G Raizen. An atomic coilgun: using pulsed magnetic fields to slow a supersonic beam. New Journal of Physics, 9(10):358, 2007. 175
[70] Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen. Stopping supersonic beams with a series of pulsed electromagnetic coils: An atomic coilgun. Phys. Rev. Lett., 100(9):093003, Mar 2008. [71] Edvardas Narevicius, Adam Libson, Christian G. Parthey, Isaac Chavez, Julia Narevicius, Uzi Even, and Mark G. Raizen. Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun. Phys. Rev. A, 77(5):051401, May 2008. [72] Christian G. Parthey. Magnetic control of supersonic beams. Master’s thesis, The University of Texas at Austin, Austin, TX, 2007. [73] Isaac Chavez. Magnetic control of supersonic beams: Magnetic slowing to isotope separation. Master’s thesis, The University of Texas at Austin, Austin, TX, 2010. [74] John David Jackson. Classical Electrodynamics 3rd ed. Wiley, New York, 1999. [75] T. Bergeman, Gidon Erez, and Harold J. Metcalf. Magnetostatic trapping fields for neutral atoms. Phys. Rev. A, 35:1535–1546, Feb 1987. [76] Edwin M. McMillan. The synchrotron¯a proposed high energy particle accelerator. Phys. Rev., 68:143–144, Sep 1945. [77] S.Y. Lee. Accelerator Physics. World Scientific, Singapore, 1999. [78] Hendrick L. Bethlem, Giel Berden, AndréJ.A.vanRoij,FlorisM.H.Crompvoets, and Gerard Meijer. Trapping neutral molecules in a traveling potential well. Phys. Rev. Lett., 84(25):5744–5747, Jun 2000. 176
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Copyright by Adam Alexander Libson
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General Methods of Controlling Atom
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Acknowledgments First and foremost,
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to problems, and I frequently went
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General Methods of Controlling Atom
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Table of Contents Acknowledgments v
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Chapter 5. Towards Trapping and Coo
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List of Figures 2.1 Comparison of e
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5.12 Faraday Rotation Signal During
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producing a cold sample. Alternativ
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place inside a dilution refrigerato
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atoms or molecules are slowed using
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2.1 Thermodynamics of Ideal Gases F
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Since there will be no heat exchang
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Using equation 2.17 to modify equat
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Normalized Effusive Beam Flux Norma
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general method for producing cold a
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The gas throughput of the nozzle ca
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Chapter 3 Slowing Supersonic Beams
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3.1 Using Helium for Atom Optics Ex
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Figure 3.1: Calculated elastic scat
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that they can be prepared ex-situ a
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successful. Any water that remains
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Skimmer 300 l/s Turbo Pump Even-Lav
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Figure 3.5: A CAD image of the dete
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from tubular aluminum welded togeth
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Figure 3.7: A CAD image of the roto
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Figure 3.10: A CAD image of large c
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Figure 3.11: This plot shows the am
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approximations are made in this cal
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3.3.3 Detection An SRS [61] residua
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TTL pulse to the data acquisition c
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A comparison of the time-of-flight
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eceding crystal. Each curve is the
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calculated slow beam velocity is qu
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the RGA does have an effect on the
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Chapter 4 The Atomic and Molecular
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field. In the L − S coupling regi
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3 P2 E Figure 4.2: This graph gives
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For intermediate fields, the full p
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Figure 4.4: This figure illustrates
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The same effect is also responsible
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(a) (b) (c) Time Figure 4.5: A pict
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which the particles enter). The oth
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the coil can instead be switched be
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the magnitude of the field some dis
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nozzle front surface aluminum catho
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Figure 4.9: A CAD overview of the s
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258V 1MΩ 5V 1mF DC/DC Converter TT
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Figure 4.12: An oscilloscope trace
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(a) (b) Figure 4.14: A CAD image of
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-HV PS 4 M MCP Anode 10 M 1 M Trans
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Signal [V] 2.5 2.0 1.5 1.0 0.5 refe
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Figure 4.20: An exploded view of th
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(a) (b) (c) (e) Figure 4.21: A pict
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258V 1MΩ TTL 2.2mF 50Ω TTL 5V 5V
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closed. With the new thyristor gate
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HeNe M2 M1 BB /2 L BB PC coil PC PD
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Table 4.1: Peak magnetic fields mea
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Figure 4.28: A cut-away CAD image o
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ameters. The coilgun chamber consis
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Table 4.2: Final velocities (vf), s
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MCP Signal [arb. units] 2.0 1.5 (1)
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viability for molecules essential.
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8 Ω LN2 Liquid Nitrogen Dewar Nozz
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Figure 4.33: Molecular oxygen slowi
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Chapter 5 Towards Trapping and Cool
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Energy meV 0.05 0.00 0.05 0.0 0.2 0
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10 mm 2.0 T 1.8 1.6 1.4 1.2 1.0 0.8
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250V 1MΩ 3x 2.2mF TTL 5V feedback
Page 141 and 142: Magnetic Field (T) 1.9 1.7 1.5 1.3
Page 143 and 144: 5.2.2.1 Principle of Operation of t
Page 145 and 146: Figure 5.8: Photograph of the trapp
Page 147 and 148: 4.1.3. In an anti-Helmholtz trap, t
Page 149 and 150: Figure 5.11: Photograph of the hydr
Page 151 and 152: Photodiode Signal (V) Time (s) Figu
Page 153 and 154: Figure 5.13: Time of flight plot of
Page 155 and 156: 500 l/s Turbo Pump Supersonic Nozzl
Page 157 and 158: Ionizer 500 l/s Turbo Pump Ion Opti
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Page 161 and 162: Z − Velocity (m/s) 100 60 30 0
Page 163 and 164: Atom Number 60 50 40 30 20 10 0.6 0
Page 165 and 166: scattered photon to extract informa
Page 167 and 168: where k1 · pi = − k2 · pi, wh
Page 169 and 170: the electron g-factor which causes
Page 171 and 172: Figure 5.24: A schematic of the tel
Page 173 and 174: prevent the determination of the is
Page 175 and 176: (a) (b) time Figure 5.25: A 1D illu
Page 177 and 178: experiment, where a being is capabl
Page 179 and 180: potential position 2 x 243 nm Lα |
Page 181 and 182: Appendix 164
Page 183 and 184: y x V i Figure A.1: The geometry us
Page 185 and 186: Bibliography [1] H.J.MetcalfandP.va
Page 187 and 188: [17] Brian C. Sawyer, Benjamin L. L
Page 189 and 190: [34] R. Campargue. Progress in over
Page 191: [51] O. Carnal, M. Sigel, T. Sleato
Page 195 and 196: [87] Willis E. Lamb and Robert C. R
Page 197 and 198: [96] G.Gabrielse,N.S.Bowden,P.Oxley
Page 199 and 200: [110] N. Kolachevsky, J. Alnis, S.
Page 201 and 202: [125] Andreas Osterwalder, Samuel A
Page 203 and 204: [142] C. Cohen-Tannoudji, B. Diu, a
Page 205 and 206: [161] Paulo F. Bedaque, Aurel Bulga
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Experiments with Supersonic Beams as a Source of Cold Atoms

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