Fluorescent x-ray analyzer with quickly evacuable cover cases

Details Fluorescent x-ray analyzer with quickly evacuable cover cases Fluorescent x-ray analyzer with quickly evacuable cover cases

1997-08-15

1998-11-03

Church, Craig E.

X-ray or gamma ray systems or devices

Specific application

Fluorescence

378 80, G01N 23223

Patent

active

058320547

ABSTRACT:
A fluorescent x-ray analyzer of the type irradiating a sample from below is provided with both a larger outer cover case and a smaller outer cover case respectively for covering a relatively large and small sample placed on top of a base plate at the top of an evacuable analysis chamber. The inner cover case is attached to the inside of the outer cover case when a small sample is to be analyzed but the two cover cases are separated and only the outer cover case is used when a larger sample is to be analyzed such that only a small amount of air is required to be removed to create a vacuum environment around the sample. Two air routes are formed through the base plate, an inner one being inside the inner cover case and the outer one being outside the inner cover case but inside the outer cover case when the inner cover case is used attached to the outer cover case such that a vacuum pump connected to the analysis chamber and through a valve to the outer air route can be activated to selectively evacuate either the interior of the inner cover case if the two cover cases are attached to each other or the interior of the outer cover case if the inner cover case is detached therefrom. Alternatively, the outer and inner cover cases may be provided respectively with a discharge pipe connected to a vacuum pump and a discharge air route which can be connected to the discharge pipe when the two cover cases are attached to each other.

REFERENCES:
patent: 4720842 (1988-01-01), Kira et al.

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