Ceramic electron collector assembly having metal sleeve for high temperature operation

An apparatus for collecting electrons comprising:

• a heat sink comprised of a first thermally conductive material and having a cylindrical opening;
• a sleeve comprised of a second thermally conductive material having a rate of thermal expansion less than a rate of thermal expansion of said first material and being disposed within the cylindrical opening of the heat sink, said sleeve being in close contact with said heat sink when said apparatus is at an elevated operational temperature;
• and
• a collector core having an opening arranged so as to receive a beam of electrons therethrough and being disposed with the sleeve, a slight gap being defined between said collector core and said sleeve when said apparatus is at an ambient temperature, and said collector core being in close contact with said sleeve when said apparatus is at said elevated operational temperature, wherein the sleeve has an inside diameter at least 0.0002 inches larger than an outside diameter of said collector core.

An apparatus for collecting electrons comprising:

• a heat sink comprised of a first thermally conductive material and having a cylindrical opening;
• a sleeve comprised of a second thermally conductive material having a rate of thermal expansion less than a rate of thermal expansion of said first material and being disposed within the cylindrical opening of the heat sink, said sleeve being in close contact with said heat sink when said apparatus is at an elevated operational temperature;
• and
• a collector core having an opening arranged so as to receive a beam of electrons therethrough and being disposed with the sleeve, a slight gap being defined between said collector core and said sleeve when said apparatus is at an ambient temperature, and said collector core being in close contact with said sleeve when said apparatus is at said elevated operational temperature, wherein said collector core is comprised of a material having a rate of thermal expansion higher than that of said second thermally conductive material and lower than that of said first thermally conductive material.

An apparatus for collecting spent electrons from a linear beam device comprising:

• a heat sink comprised of a first thermally conductive material and having a cylindrical opening;
• a ceramic collector core disposed in said opening of said heat sink and having an opening arranged so as to receive a beam of electrons therethrough from said linear beam device;
• and
• means for compensating for a difference in thermal expansion rates between said heat sink and said collector core, wherein heat generated within said collector core is conducted to said heat sink through said compensating means, said compensating means being in close contact with said collector core when said apparatus is at an elevated operational temperature and a slight gap being defined between said compensating means and said collector core when said apparatus is at an ambient temperature.

An apparatus for collecting spent electrons from a linear beam device comprising:

• a heat sink comprised of a first thermally conductive material and having a cylindrical opening;
• a ceramic collector core disposed in said opening of said heat sink and having an opening arranged so as to receive a beam of electrons therethrough from said linear beam device;
• and
• means for compensating for a difference in thermal expansion between said heat sink and said collector core, wherein said compensating means further comprises a sleeve comprised of a second thermally conductive material having a rate of thermal expansion less than a rate of thermal expansion of said first thermally conductive material and being disposed within the cylindrical opening of the heat sink between said collector core and said heat sink thereby compensating for said difference in thermal expansion therebetween, said sleeve being in close contact with said collector core when said apparatus is at an elevated operational temperature with a slight gap being defined between said collector core and said sleeve when said apparatus is at an ambient temperature, wherein the sleeve has an inside diameter at least 0.0002 inches larger than an outside diameter of said collector core.

An apparatus for collecting spent electrons from a linear beam device comprising:

• a heat sink comprised of a first thermally conductive material and having a cylindrical opening;
• a ceramic collector core disposed in said opening of said heat sink and having an opening arranged so as to receive a beam of electrons therethrough from said linear beam device;
• and
• means for compensating for a difference in thermal expansion between said heat sink and said collector core, wherein said compensating means further comprises a sleeve comprised of a second thermally conductive material having a rate of thermal expansion less than a rate of thermal expansion of said first thermally conductive material and being disposed within the cylindrical opening of the heat sink between said collector core and said heat sink thereby compensating for said difference in thermal expansion therebetween, said sleeve being in close contact with said collector core when said apparatus is at an elevated operational temperature with a slight gap being defined between said collector core and said sleeve when said apparatus is at an ambient temperature, wherein said ceramic collector core has a rate of thermal expansion higher than that of said second thermally conductive material and lower than that of said first thermally conductive material.