First High Power Test Results for 2.1 GHz Superconducting Photonic Band Gap Accelerator Cavities

Evgenya I. Simakov; W. Brian Haynes; Michael A. Madrid; Frank P. Romero; Tsuyoshi Tajima; Walter M. Tuzel; Chase H. Boulware; Terry L. Grimm

doi:10.1103/PhysRevLett.109.164801

First High Power Test Results for 2.1 GHz Superconducting Photonic Band Gap Accelerator Cavities

Evgenya I. Simakov, W. Brian Haynes, Michael A. Madrid, Frank P. Romero, Tsuyoshi Tajima, Walter M. Tuzel, Chase H. Boulware, Terry L. Grimm

DOI 10.1103/PhysRevLett.109.164801 · Physical Review Letters

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Abstract

We report the results of the recent high power testing of superconducting radio frequency photonic band gap (PBG) accelerator cells. Tests of the two single-cell 2.1 GHz cavities were performed at both 4 and 2 K. An accelerating gradient of 15 MV/m and an unloaded quality factor Q0 of 4×109 were achieved. It has been long realized that PBG structures have great potential in reducing long-range wakefields in accelerators. A PBG structure confines the fundamental TM01-like accelerating mode, but does not support higher order modes. Employing PBG cavities to filter out higher order modes in superconducting particle accelerators will allow suppression of dangerous beam instabilities caused by wakefields and thus operation at higher frequencies and significantly higher beam luminosities. This may lead towards a completely new generation of colliders for high energy physics and energy recovery linacs for the free-electron lasers.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	9.2	Pressure unresolved	unknown