抄録
The usual way to reduce outgassing from a device in vacuum is to heat up a whole vacuum chamber containing the device. However, the situation, where this method can be applied, is limited due to the heat expansion of the chamber. Especially in accelerators, where the vacuum chambers are connected with nearby beam pipes, this normal bake-out method may not be applied. If a heat source and heat shields are appropriately installed inside the chamber, heat flux is directed to the device. Therefore the device can be baked out without raising the temperature of the vacuum chamber. One candidate for such bake-out method to be applied is kicker magnets in J-PARC RCS, which are installed in large vacuum chambers. We performed the heating tests with some types of heaters in order to examine the effectiveness of this method and to decide the material and configuration of the heater. As a result, the graphite heater was selected for in-situ bake-out of the kickers in the RCS beam line. Using the method, the each material of kicker magnet was heated up above 100℃ with keeping the temperature rise of the vacuum chamber below 30℃.
