Development of a 50 kw cw L-band rectangular window for Jefferson Lab FEL cryomodule

Author

Nguyen, V. ; Phillips, H.L. ; Preble, J.

Author_Institution

Thomas Jefferson Nat. Accel. Facility, Newport News, VA, USA

Volume

2

fYear

1999

fDate

1999

Firstpage

1459

Abstract

A 50 kW CW L-Band Rectangular Ceramic Window has been developed for the Jefferson Lab FEL quarter cryomodule. RF properties of the windows were optimized using high-frequency simulation codes and S-parameter measurements confirmed the predicted broadband matching properties of the structure. Metallized AL 995 alumina ceramic was brazed to a thin copper eyelet and the eyelet to a copper plated stainless steel flange. Losses in the metallization were removed efficiently by a water cooling circuit. High power tests in a resonant ring showed that the ceramic temperature rise was very low at 50 kW CW level

Keywords

accelerator cavities; cryogenics; electron accelerators; free electron lasers; linear accelerators; superconducting cavity resonators; 50 kW; Jefferson Lab FEL cryomodule; S-parameter measurements; broadband matching properties; ceramic temperature rise; copper plated stainless steel flange; cw L-band rectangular window; high-frequency simulation codes; metallized AL 995 alumina ceramic; thin copper eyelet; water cooling circuit; Ceramics; Circuit simulation; Copper; Flanges; L-band; Metallization; Predictive models; Radio frequency; Scattering parameters; Steel;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1999. Proceedings of the 1999

Conference_Location

New York, NY

Print_ISBN

0-7803-5573-3

Type

conf

DOI

10.1109/PAC.1999.795581

Filename

795581