Patent Number: 
Section: claims

1. A target supply device comprising:a tank, formed of a metal, configured to hold a target material;a nozzle including a hole that communicates with the interior of the tank;an insulating member configured to make contact with at least part of the periphery of the tank; anda heater that is separated from the tank and is configured to heat the tank via the insulating member. 2. The target supply device according to claim 1,wherein the insulating member is formed of at least two insulating members disposed so that a gap is defined therebetween;the target supply device further includes a jacket configured to hold the at least two insulating members in contact with the tank; andthe heater is disposed on the jacket. 3. The target supply device according to claim 2,wherein the jacket is configured of at least two members, andthe target supply device further includes:a fastening member configured to fasten the at least two members together; andan elastic member disposed between the jacket and the fastening member. 4. The target supply device according to claim 2,wherein thermal expansion coefficients of the tank, the insulating member, and the jacket fulfill a relationship βT<βI<βJ, where βT represents the thermal expansion coefficient of the tank, βI represents the thermal expansion coefficient of the insulating member, and βJ represents the thermal expansion coefficient of the jacket. 5. The target supply device according to claim 2,wherein the insulating member includes:a contact portion that makes contact with the tank; anda protruding portion that protrudes from an end area of the contact portion. 6. The target supply device according to claim 1, further comprising:an insulating sheet disposed around the outer circumference of the heater. 7. An extreme ultraviolet light generation apparatus that generates extreme ultraviolet light by irradiating a target material with a laser beam introduced from the exterior, the apparatus comprising:a chamber into which the laser beam is introduced; anda target supply device configured to supply the target material to the interior of the chamber,the target supply device including:a tank, formed of a metal, configured to hold a target material;a nozzle including a hole that communicates with the interior of the tank;an insulating member configured to make contact with at least part of the periphery of the tank; anda heater that is separated from the tank and is configured to heat the tank via the insulating member.