Experiments with Supersonic Beams as a Source of Cold Atoms
Experiments with Supersonic Beams as a Source of Cold Atoms
Experiments with Supersonic Beams as a Source of Cold Atoms
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4.11 Schematic <strong>of</strong> the 18 Stage Coil Driver Circuit . . . . . . . . . . . . . 80<br />
4.12 Current in 18 Stage Slowing Coil . . . . . . . . . . . . . . . . . . . . 82<br />
4.13 Temporal Pr<strong>of</strong>ile <strong>of</strong> the Magnetic Field in the 18 Stage Coil . . . . . 83<br />
4.14 CAD Image and Photo <strong>of</strong> 18 Stage Coilgun . . . . . . . . . . . . . . . 84<br />
4.15 CAD Image <strong>of</strong> the 18 Stage Coilgun in the Rotor Chamber . . . . . . 85<br />
4.16 Schematic <strong>of</strong> the MCP Bi<strong>as</strong> Circuit . . . . . . . . . . . . . . . . . . . 86<br />
4.17 Photos <strong>of</strong> the 18 Stage Coilgun and Chamber . . . . . . . . . . . . . 86<br />
4.18 Results <strong>of</strong> Ph<strong>as</strong>e Variation in 18 Stage Coilgun . . . . . . . . . . . . . 87<br />
4.19 Results <strong>of</strong> Current Variation in 18 Stage Coilgun . . . . . . . . . . . . 88<br />
4.20 Exploded CAD View <strong>of</strong> 64 Stage Coilgun Coil . . . . . . . . . . . . . 90<br />
4.21 64 Stage Slower Coil Assembly Process . . . . . . . . . . . . . . . . . 92<br />
4.22 Finite Element Calculation <strong>of</strong> the 64 Stage Coilgun Magnetic Field . 93<br />
4.23 Schematic <strong>of</strong> the 64 Stage Coil Driver Circuit . . . . . . . . . . . . . 94<br />
4.24 Photographs <strong>of</strong> the 64 Stage Coil Driver Board . . . . . . . . . . . . . 95<br />
4.25 Schematic <strong>of</strong> Faraday Rotation Setup . . . . . . . . . . . . . . . . . . 98<br />
4.26 Temporal Pr<strong>of</strong>ile <strong>of</strong> the Faraday Rotation in a 64 Stage Coilgun Coil 99<br />
4.27 64 Stage Aluminum Coil Support Structure . . . . . . . . . . . . . . 101<br />
4.28 Cut-Away CAD Image <strong>of</strong> the 64 Stage Coilgun and Vacuum Chamber 102<br />
4.29 CAD Image <strong>of</strong> the 64 Stage Coilgun Vacuum System . . . . . . . . . 103<br />
4.30 Neon Slowing Data from 64 Stage Coilgun . . . . . . . . . . . . . . . 105<br />
4.31 Slowing Flux <strong>with</strong> Variable vs. Constant Ph<strong>as</strong>e . . . . . . . . . . . . 108<br />
4.32 Schematic <strong>of</strong> LN2 Boil Off Valve Cooling System . . . . . . . . . . . 112<br />
4.33 Oxygen Slowing Data from 64 Stage Coilgun . . . . . . . . . . . . . . 114<br />
5.1 Hyperfine Structure <strong>of</strong> Ground State Hydrogen . . . . . . . . . . . . 118<br />
5.2 Numerical Calculation <strong>of</strong> the Magnetic Field in the Hydrogen Coilgun<br />
Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120<br />
5.3 Photograph <strong>of</strong> the Hydrogen Coilgun Coil on the Chamber . . . . . . 121<br />
5.4 Schematic <strong>of</strong> the Coilgun Coil Switching Circuit . . . . . . . . . . . . 122<br />
5.5 Photograph <strong>of</strong> the Hydrogen Coilgun Coil Driver Circuit . . . . . . . 123<br />
5.6 Faraday Rotation Me<strong>as</strong>urement <strong>of</strong> the Magnetic Field in the Hydrogen<br />
Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124<br />
5.7 Switching Sequence <strong>of</strong> the Trapping Coils <strong>with</strong> Numerical Calculations<br />
<strong>of</strong> the Fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127<br />
5.8 Photograph <strong>of</strong> the Trapping Coils Wound around the Chamber . . . . 128<br />
5.9 Me<strong>as</strong>ured On-Axis Magnetic Fields in the Trapping Coils . . . . . . . 129<br />
5.10 Schematic <strong>of</strong> the Trapping Coil Switching Circuit . . . . . . . . . . . 131<br />
5.11 Photograph <strong>of</strong> the Hydrogen Trap Coil Driving Circuit . . . . . . . . 132<br />
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