CERN Accelerating science

Article
Report number	SLAC-PUB-10118
Title	Thermionic RF Gun and Linac Pre-Injector for SPEAR3
Author(s)	Park, S
Publication	2002
Imprint	11 Aug 2002
Number of pages	4
In:	21st International Linear Accelerator Conference, Gyeongju, Korea, 19 - 23 Aug 2002, pp.322-324
Subject category	Accelerators and Storage Rings
Abstract	Preparations are underway to upgrade the Spear2 to the third generation light source. Installation of all the subsystems will start in April 2003. Although the Spear3 RF system is entirely different from the present form, the pre-injector gun/linac and booster synchrotron will remain the same even after the upgrade. The thermionic rf gun reliability and stability are to be improved to inject 500 mA of stored current in shortest possible time. When a top-up mode is enforced, where the stored beam decay is replenished to maintain the constant current and thus constant light intensity, the Spear3 will take injection every few minutes. In that case the gun, linac, and booster must stay on at all times. In this report we will describe some improvements made on the gun and linac in the recent past, as well as their present performance and future upgrade to be made.