Title :
The PEP-II abort kicker system
Author :
de Lamare, J. ; Donaldson, A. ; Kulikov, A. ; Lipari, J.
Author_Institution :
Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The PEP-II project has two storage rings. The HER (High Energy Ring) has up to 1.48 A of electron beam at 9 GeV, and the LER (Low Energy Ring) has up to 2.14 A of positron beam at 3.1 GeV. To protect the HER and LER beam lines in the event of a ring component failure, each ring has an abort kicker system which directs the beam into a dump when a failure is detected. Due to the high current of the beams, the beam kick is tapered from 100% to 80% in 7.33 μS (the beam transit time around the ring). This taper distributes the energy evenly across the window which separates the ring from the beam dump such that the window is not damaged. The abort kicker trigger is synchronized with the ion clearing gap of the beam allowing for the kicker field to rise from 0-80% in 370 nS. This report discusses the design of the system controls, interlocks, power supplies, and modulator
Keywords :
accelerator magnets; electron accelerators; safety systems; storage rings; 1.48 A; 2.14 A; 3.1 GeV; 9 GeV; High Energy Ring; Low Energy Ring; PEP-II abort kicker system; abort kicker trigger; electron beam; interlocks; ion clearing gap; modulator; positron beam; power supplies; ring component failure; storage rings; Circuit faults; Control systems; Driver circuits; Event detection; Fault detection; Magnetic modulators; Magnetic separation; Optical modulation; Power supplies; Thyratrons;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.750012
