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

Volume

1

fYear

1997

fDate

12-16 May 1997

Firstpage

1316

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1997. Proceedings of the 1997

Conference_Location

Vancouver, BC

Print_ISBN

0-7803-4376-X

Type

conf

DOI

10.1109/PAC.1997.750012

Filename

750012