Gamma ray collimator
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorEdgar J. Casanova
Life of this patent
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Abstract
A gamma ray collimator including a housing having first and second sections. The first section encloses a first section of depleted uranium which is disposed for receiving and supporting a radiation emitting component such as cobalt 60. The second section encloses a depleted uranium member which is provided with a conical cut-out focusing portion disposed in communication with the radiation emitting element for focusing the emitted radiation to the target.
Claims8
A collimator for receiving and supporting a radioactive component therein and for directing radioactive emissions from said radioactive component to a target for non-destructive radiographic testing thereof comprising:
- a housing having a first section provided with a closed end and a second section provided with an open end;
- shielding means carried in said housing and disposed for support of said radioactive component therein, said shielding means being comprised of depleted uranium and having first and second sections, said first section of said shielding means carried in said first section of said housing and being provided with passage means including a bore disposed in communication with the exterior of shielding means to receive and support said radioactive component in said first section of said shielding means during the radiographic testing process, said second section of said shielding means being carried in said second section of said housing;
- retaining means for retention of said radioactive component in said first section of said shielding means during the radiographic testing process, said retaining means being a retaining member positioned to limit the extent of movement of said radioactive component in said bore of said first shielding section;
- focussing means formed in said second section of said shielding means for focussing the radioactive emissions to said target, said focussing means defined by an annular portion having a central opening aligned with said bore of said shielding means for directing the radioactive emissions through said open end of said housing;
- and
- impact resisting means for support of said shielding means in said housing.
Dependencies are inferred from the claim text.