Low-level RF system design for the Next Linear Collider damping rings

Author

Minty, M.G.

Author_Institution

Linear Accel. Center, Stanford Univ., CA, USA

Volume

1

fYear

1997

fDate

12-16 May 1997

Firstpage

357

Abstract

The design current for the Next Linear Collider (NLC) damping rings is an order of magnitude higher than existing damping rings. As opposed to storage rings, damping rings are required to operate at a high repetition frequency. Transient beam loading is therefore particularly severe. The NLC design calls for a full current fill pattern consisting of up to 4 trains of 90 bunches for a total DC current of 1.2 A. However, using conventional filling techniques, with a rapid current ramp the ring energy acceptance could decrease due to transient loading and the beam might not be captured. In this paper we describe two features of the low-level RF system design. The first avoids any reduction of duty cycle while the second ensures beam capture and regulation of the cavity voltages and beam phase

Keywords

accelerator RF systems; beam handling equipment; linear colliders; 1.2 A; Next Linear Collider damping rings; beam capture; beam phase; cavity voltages; full current fill pattern; low-level RF system design; rapid current ramp; ring energy acceptance; transient beam loading; Colliding beam devices; DC generators; Damping; Feedback loop; Radio frequency; Steady-state; Tuners; Vectors; Virtual colonoscopy; Voltage;

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.1997.749641

Filename

749641