Title :
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
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;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.795581
