
Instrument Overviews
2013 Short Form Catalog
Instruments by Lab Topics
diode laser spectroscopy
earth's field nmr
earth's field nmr gradient/field coil system
fabryperot cavity
faraday rotation
foundational magnetic susceptibility
fourier methods
hall effect
magnetic force
magnetic torque
modern interferometry
muon physics
noise fundamentals
optical pumping
power/audio amplifier
pulse counter/interval timer  new
pulsed/cw nmr
pulsed nmr
quantum analogs
signal processor /lockin amplifier
torsional oscillator
two slit interference, one photon at a time
ultrasonics  New
individual parts




Torsional Oscillator
Newsletter 1  Appropriate from Freshman to Advanced Lab
Newsletter 2  Magnetic Torque in Action
Newsletter 3  Damped and Driven
Newsletter 4  Torsional Oscillator and the Electronic Kilogram
Conceptual Introduction – Torsional Oscillator
Torsional Oscillator Brochure
Introduction 
Lab Courses:
Classical Mechanics
Modern Physics
Sound and Waves



Simple Harmonic Oscillation Made Visible, Tangible, Accessible, Measurable
 fully instrumented testbed for investigating simple harmonic motion
 variable torsion constant and rotational inertia
 noncontact precision analog sensors provide angular position and velocity
 damping options range from constant to velocity dependent and include a v^{2}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
 "intellectual phase space" ranges from rotational kinematics and rotational dynamics to general oscillations and waves
 appropriate from the freshman to advanced lab, from mechanics to advanced electronics
Few systems in physics have wider applicability than the Simple Harmonic Oscillator (SHO). At every level of their education, from firstyear undergraduate to advanced graduate training, students will find something valuable and applicable in the physics of the Simple Harmonic Oscillator.
 In introductory mechanics as Hooke'sLaw oscillation problems;
 In analysis of the LCR system in circuit theory;
 In every normalmode problem in mechanics and electromagnetism;
 In the quantummechanical SHO problem in
 one dimensional particle and molecular vibrations,
 quantization of each mode of the electromagnetic field;
 As a model for the resonant excitation of atoms or nuclei by external fields.
We have chosen a system and a set of parameters that are optimized for both seeing and learning. Quite deliberately, we have chosen a macroscopic and plainly visible mechanical system, which oscillates with periods on the order of one second so that students can see the behavior of the system on a human time scale.
We have even provided handson involvement. When applying a torque by fingertip students learn quite tangibly, the phase relationship required between the system's angular position and the applied torque in order to achieve resonant excitation.
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