Title :
Air temperature control improvement for the storage ring tunnel
Author :
Chang, J.C. ; Liu, C.Y. ; Chen, J.R.
Author_Institution :
Nat. Synchrotron Radiat. Res. Center, Hsinchu, Taiwan
Abstract :
Based on the thermal effects on the beam stability formerly studied, a series of measures are taken to improve the air temperature control for the storage ring tunnel at the Taiwan Light Source (TLS). The cooling capacity is increased about two times by rearranging the Air Handling Units (AHU) and the piping system. The PID parameters are optimised to more effectively suppress the air temperature fluctuation. The global air temperature variation in the storage ring tunnel is currently controlled within ±0.1 °C related to time. After successful experience of air temperature control for the elliptical polarization undulator (EPU), the mini environment control is also applied on another insertion device, undulator 5 (U5). The ambient temperature variation of this magnet is controlled within ±0.1 °C related to time. The thermal uniformity is much improved than ever.
Keywords :
beam handling techniques; electron accelerators; particle beam stability; storage rings; temperature control; air temperature control; air temperature fluctuation; beam stability; cooling capacity; elliptical polarization undulator; piping system; storage ring tunnel; thermal effects; thermal uniformity; undulator 5; Air conditioning; Cooling; Ducts; Fluctuations; Light sources; Storage rings; Temperature control; Thermal stability; Three-term control; Undulators;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1288568
