iris/dental caries

BACKGROUND Plasma sources for spectrochemical analysis sometimes include a plasma torch coupled to an electromagnetic waveguide so that electromagnetic radiation (e.g., microwave radiation) can be used to generate and sustain the plasma. One known type of plasma source includes a waveguide so

TECHNICAL FIELD The present invention relates to spectrometry and in particular to a method and apparatus for producing a plasma by microwave power for heating a sample for spectrochemical analysis, for example by optical emission spectrometry or mass spectrometry. BACKGROUND It is known to excite a

BACKGROUND 1. Technical Field The present disclosure is related to plasma applicators and, in particular, to a compact microwave plasma applicator which utilizes conjoining electric fields. 2. Discussion of Related Art In semiconductor processing, plasma generators are often employed upstream of a

BACKGROUND Various applications may include a sealed chamber formed in a semiconductor structure. Although there are numerous applications of sealed chamber, in one particular application, a chip-scale atomic dock may include a selected vapor at a low pressure in a sealed chamber. Forming such

FIELD OF THE INVENTION The present invention relates generally to linear accelerators. More specifically, it relates to improved microwave linear accelerators. BACKGROUND OF THE INVENTION A linear particle accelerator (linac) accelerates charged particles using a series of oscillating electric

BACKGROUND Various applications may include a sealed chamber formed in a semiconductor structure. In one particular application, a chip-scale atomic clock may include a selected vapor at a low pressure in a sealed chamber. Forming such structures can be a challenge. SUMMARY In one embodiment, a

TECHNICAL FIELD The present invention relates to means for producing a plasma by microwave power for heating a sample for spectrochemical analysis, for example by optical emission spectrometry or mass spectrometry. BACKGROUND The applicant's prior International Patent Application No. PCT/AU01/00805

BACKGROUND Various applications may include a sealed chamber formed in a semiconductor structure. In one particular application, a chip-scale atomic clock may include a selected vapor at a low pressure in a sealed chamber. Forming such structures can be a challenge. SUMMARY In one embodiment, a

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to cleansing means and more particularly to an improved device and method for cleansing the head of a stethoscope. 2. Prior Art Stethoscopes are in constant use by physicians, nurses, respiratory care