A microcomputer controlled CCD H-alpha spectrometer

A microcomputer- controlled thermostat

Introduction Careful temperature control is essential for a wide variety of chemical measurements. High-precision potentiometry, for instance, requires thermostatting, since the slope of the straight line E vs log a is highly temperature dependent (E is the measured emf, log a is the logarithm of the activity of species i). The equation describing the relationship between the measured quantity ...

A microcomputer ( ffiM PC ) based pulsed NMR spectrometer

This paper describes the design and construction of a personal computer (PC) based pulsed NMR spectrometer to measure spin-lattice relaxation times in solids. The spectrometer works at 10 MHz and produces d. pulses of amplitude 200 Vp_p' The pulse programmer provides various pulse sequences such as 180°-1"-90°and 90°-1"-180°and inter pulse intervals (1")can be computer programmed. The rise and ...

A microcomputer system for use with an EPR spectrometer

Miniature Neutron-Alpha Activation Spectrometer

We are developing a miniature neutron-alpha activation spectrometer for in-situ analysis of chem-bio samples, including rocks, fines, ices, and drill cores, suitable for a lander or Rover platform for Mars or outer-planet missions. In the neutron-activation mode, penetrating analysis will be performed of the whole sample using a y spectrometer and in the ex-activation mode, the sample surface w...

A microscope stage controlled by a BBC Model B microcomputer