Observation of superposition of wake fields generated by electron bunches in a dielectric-lined waveguide

被引：0

作者：

Shchelkunov, SV ^{[1
]}

Babzien, MA ^{[1
]}

Hirshfield, JL ^{[1
]}

LaPointe, MA ^{[1
]}

机构：

[1] Columbia Univ, New York, NY 10027 USA

来源：

2005 IEEE PARTICLE ACCELERATOR CONFERENCE (PAC), VOLS 1-4 | 2005年

关键词：

D O I：

暂无

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report results from an experiment, done at the Accelerator Test Facility, Brookhaven National Laboratory, which demonstrates the successful superposition of wake fields excited by 50MeV bunches which travel similar to 50cm along the axis of a cylindrical waveguide which is lined with alumina. Wake fields from two short (5-6psec) 0.15-0.35nC bunches are superimposed and the energy losses of each bunch are measured as the separation between the bunches is varied so as to encompass approximately one wake field period (similar to 21cm). A spectrum of 40 TM0m eigenmodes is excited by the bunch. A substantial retarding wake field (2.65MV/m center dot nC for just the first bunch) is developed because of the short bunches and the narrow vacuum channel diameter (3mm) through which they move. The energy loss of the second bunch exhibits a narrow resonance with a 4mm (13.5psec) footprint. This experiment may be compared with a related experiment reported by a group at the Argonne National Laboratory where a similar to 30 times weaker wake field (similar to 0.1 MV/m center dot nC for the first bunch) having similar to 10 eigenmodes was excited by a train of much longer bunches [1], and the bunch spacing was not varied.

引用

页码：2789 / 2791

页数：3

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