Development of the third harmonic sc cavity at Fermilab

Author

Solyak, N. ; Gonin, I. ; Edwards, H. ; Foley, M. ; Khabiboulline, Timergali ; Mitchel, D. ; Reid, J. ; Simmons, L.

Author_Institution

Fermi Nat. Accel. Lab., USA

Volume

2

fYear

2003

fDate

12-16 May 2003

Firstpage

1213

Abstract

The third harmonic 3.9 GHz superconducting cavity was recently proposed by DESY for a new generation of high brightness photo-injector (TTF photoinjector-2) to compensate nonlinear distortion of the longitudinal phase space due to RF curvature of the 1.3 GHz TESLA cavities. Installation of the 3rd harmonic cavity will allow us to generate ultra-short (<50 μm rms) highly charged electron bunches with an extremely small transverse normalized emittance (<1 μm). This is required to support a new generation of linear colliders, free electron lasers and synchrotron radiation sources. In this paper we present the current status of the 3rd harmonic cavity being developed at Fermilab. We discuss the design procedure, the building and testing of the copper and niobium half-cells and components, the design of input and HOM couplers.

Keywords

accelerator RF systems; accelerator cavities; electron accelerators; free electron lasers; linear colliders; particle beam bunching; particle beam dynamics; particle beam injection; superconducting cavity resonators; 1.3 GHz; 3.9 GHz; Fermilab; HOM couplers; RF curvature; TESLA cavities; copper half-cell; design procedure; electron bunches; free electron lasers; high brightness photoinjector; linear colliders; longitudinal phase space; niobium half-cell; nonlinear distortion; synchrotron radiation sources; third harmonic superconducting cavity; transverse normalized emittance; Brightness; Buildings; Copper; Electron emission; Free electron lasers; Niobium; Nonlinear distortion; Radio frequency; Synchrotron radiation; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1289656

Filename

1289656