Device for manufacturing SiO
A device for manufacturing SiO 2 —TiO 2 based glass by growing a glass ingot upon a target by a direct method. The device includes the target, comprising a thermal storage portion that accumulates heat by being preheated, and a heat insulating portion that suppresses conduction of heat from the thermal storage portion in a direction opposite to the glass ingot.
1. A device for manufacturing SiO 2 —TiO 2 based glass by growing a glass ingot upon a target by a direct method, comprising:
the target, comprising
a thermal storage portion that accumulates heat by being preheated, and
a heat insulating portion that suppresses conduction of heat from the thermal storage portion in the direction opposite to the glass ingot,
wherein the thermal storage portion comprises a plate-shaped first member, and has convex portions upon a surface of the first member that is opposite to the glass ingot.
2. The device according to claim 1 , wherein:
the heat insulating portion comprises a plate-shaped second member, and the first member and the second member are in mutual thermal contact via the convex portions.