Related Experiment Video
Updated: Jun 14, 2026
16:20
Hyperpolarized Xenon for NMR and MRI Applications
Published on: September 6, 2012
Abstract:
A closed loop feedback system for stabilizing the radiant flux of a xenon arc lamp is described. Stabilization is accomplished by focusing the image of the arc onto a photodiode, the current output of which is amplified and used to modulate the arc current in a dc controlled power supply. The feedback control eliminates light intensity spikes and drift and significantly reduces noise. The lamp characteristics (current, voltage, radiant flux) were recorded under controlled and uncontrolled operating conditions.
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