PAC09 - List of Authors (Haimson, J.)

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Haimson, J.

Paper	Title	Page
TU5PFP085	A High Power Dual Resonant Ring System for High Gradient Testing of 11.424 GHz Linear Accelerator Structures	1029
	J. Haimson, B.A. Ishii, B.L. Mecklenburg, G.A. Stowell HRC, Santa Clara, California
	Funding: Work performed under the auspices of the U.S. Department of Energy SBIR Grant No. DE-FG02-08ER85197. The salient features and design parameters of a dual resonant ring system configured for evaluating the high gradient performance of 11.424 GHz TW linear accelerator structures are presented; and the inherent rapid protection mechanism that automatically limits energy deposition during breakdown of the structure, and minimizes RF source reflections, is discussed. The diagnostic characteristics of the RF bridge load monitors and their unique capability of detecting the power imbalance caused by a feedback loop phase change of less than 2 parts in 10000, representing a 2 to 3 degree phase change of the linac structure, is described. The transient and steady-state power apportionment within the ring system is analyzed; and, in considering initial high power tests using an 18-cavity CLIC/KEK/SLAC structure, the results indicate that the demonstration of an unloaded average accelerating gradient of 10⁸ MV/m will require a source power of 26 MW.

Paper

Title

Page

TU5PFP085

A High Power Dual Resonant Ring System for High Gradient Testing of 11.424 GHz Linear Accelerator Structures

1029

J. Haimson, B.A. Ishii, B.L. Mecklenburg, G.A. Stowell
HRC, Santa Clara, California

Funding: Work performed under the auspices of the U.S. Department of Energy SBIR Grant No. DE-FG02-08ER85197.

The salient features and design parameters of a dual resonant ring system configured for evaluating the high gradient performance of 11.424 GHz TW linear accelerator structures are presented; and the inherent rapid protection mechanism that automatically limits energy deposition during breakdown of the structure, and minimizes RF source reflections, is discussed. The diagnostic characteristics of the RF bridge load monitors and their unique capability of detecting the power imbalance caused by a feedback loop phase change of less than 2 parts in 10000, representing a 2 to 3 degree phase change of the linac structure, is described. The transient and steady-state power apportionment within the ring system is analyzed; and, in considering initial high power tests using an 18-cavity CLIC/KEK/SLAC structure, the results indicate that the demonstration of an unloaded average accelerating gradient of 10⁸ MV/m will require a source power of 26 MW.