250 GHz cold tests for the LLNL CARM experiment

Conference · Wed May 01 04:00:00 EDT 1991

OSTI ID:5608926

Kulke, B; Caplan, M; Stever, R D

A cyclotron autoresonant maser (CARM) experiment has been designed and built for operation at 250 GHz, in conjunction with the LLNL ARC induction linac. Beam parameters are 2 MeV, 1 kA, 30 ns. The RF structures tested consist of 7 mm diam, 9--18 cm long Bragg sections. These sections are electroformed, with 50--90 {mu}m deep, sinusoidal ripples spaced at half wavelength intervals. A shallow ripple depth is essential in separating the desired, TE{sub 11} resonance from neighboring resonances that are excited by mode conversion. We present code results and validating cold test data that illustrate the sensitivity of mode separation to ripple depth. We also present design calculations and calibration data at 250 GHz for a 2 m long, microwave diffraction tank.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5608926
• Report Number(s): UCRL-JC-107140; CONF-910505--441; ON: DE92009693
• Country of Publication: United States
• Language: English

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