Overview of TeachSpin Products for the Advanced Physics, Chemistry and Engineering Laboratory

TeachSpin Products:

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Diode Laser Spectroscopy
• Explore Doppler-Free Spectroscopy of Rubidium Gas
• Determine Resonant Faraday Rotation in Rb Vapor
• Examine Stabilized Diode Laser

Earth's Field EFNMR 1-A
• Measure Proton and Fluorine NMR
• Discover Curie's Law and Spin-Lattice Relaxation
• Cancel Gradients Due to Local Effects, Observe Natural FID
• Study Field Dependence of NMR

Earth's Field w/ Gradient/Field Coil EFNMR 1-B
Gradient Coils:

Homogenize Local Earth's Magnetic Field
Permit Measurement of Spin-Spin Relaxation (T₂)
Demonstrate One-Dimensional NMR Imaging (MRI)
Generate Observable (and Audible) Spin-Echoes

Helmholtz Coils:

Permit Absolute Measurement of Nuclear Magnetic Moments
Provide Fields for Experiments on ³¹P and ²H Nuclei
Show Quantitatively that Magnetic Fields Add as Vectors

Fabry-Perot Cavity 780 ± 40 nm
• Calibrate Optical Frequency Scale of Tunable Laser
• Investigate and Employ Cavity Mode Structure

Faraday Rotation
• Measure Verdet Constant of Transparent Solids
and Liquids
• Study Interaction of Light, Matter, and Magnetic Fields

Hall Effect Probe
• Measure the Magnetic Fields You Teach
• High Sensitivity 2 x 10^-3 mT

Magnetic Force
• Discover Magnetic Force Depends on Field Gradient
• Measure µ from Magnetic Force

Magnetic Torque
• Measure µ Five Independent Ways
• Observe "Classical" Magnetic Resonance
• Includes Magnetic Force Balance

Modern Interferometry
• Sagnac, Michelson, Mach-Zehnder Configurations
• Thermal Expansion, Magneto-Striction, Electro-Optic
Effect and more
• Proprietary Flexure Mirror Mounts

Muon Physics
• Measure Muon Lifetime
• Demonstrate Relativistic Time Dilation

Noise Fundamentals

Detect and quantify Johnson noise, the ‘Brownian motion’ of electrons

Deduce Boltzmann’s constant, k_B, from the temperature dependence of Johnson Noise

Observe and quantify shot noise in order to measure the fundamental charge ‘e’

Optical Pumping of Rubidium Vapor
• Precisely Measure Hyperfine Structure
• Study Rabi Oscillations

Pulse-Counter/Interval-Timer

Discriminate pulse events from a noise background, for pulses of amplitude 10 mV to > 1 Volt
Correctly count 'events per unit time', with 0.1, 1.0, or 10-second counting intervals
Alternatively, measure the time interval between a pulse and its successor pulse, to 1- µs resolution
Write date files of unlimited length of successive counts per unit time, or intervals between successive counts.

Pulsed/CW Nuclear Magnetic Resonance Spectrometer
• 21 MHz Proton Pulsed NMR
• Research Grade Measurements of T₁ and T₂

Quantum Analogs
Acoustic models of:
   - Hydrogen Atom
   - Hydrogen Molecule
   - Lowering symmetry to lift degeneracy
   - Band gaps in semiconductors

Signal Processor/Lock-In Amplifier
• A Teaching Lock-In
• Multiple Electronic Strategies for Processing
Electronic Signals
• Noise Generator and Test Signals Built-In

Torsional Oscillator

fully instrumented test-bed for investigating simple harmonic motion
variable torsion constant and rotational inertia
non-contact precision analog sensors provide angular position and velocity
damping options range from constant to velocity dependent and include a v²-friction regime
magnetic torque drive accommodates arbitrary drive waveforms
resonant behavior in time and frequency domains with "Q" ranging from less than 1 to more than 100

Two-Slit Interference, One Photon at a Time
• Perform Two-Slit Interference with Single Photon
Source and Detector
• Recreate Young's Two-Slit Measurement of the
Wavelength of Light

Individually Available Parts
• This assortment of components, originally developed for
   TeachSpin instruments, will work with home built projects
   as well. If there is another part you might find useful,
   please contact us.

Components used with:
• Diode Laser
• Modern Interferometry
• Optical Pumping