Measured longitudinal beam impedance of a Tevatron separator

[摘要] Twenty two separators are currently installed in the Tevatron. The longitudinal impedance of one of these devices was recently measured with a stretched wire. The stretched wire technique can only measure impedance below the cutoff frequency (500MHz). The geometry of a separator is similar to an un-terminated stripline beam position detector. The separator plates occupy a 13.5'' ID vacuum tank, are 101'' long, 7.8'' wide, and have a 2'' gap between them. The differential characteristic impedance between the plates is estimated to be 81 {Gamma} and the common mode impedance plate to ground is about 42 {Gamma}.

[发布日期] 2002-12-09 [发布机构] Fermi National Accelerator Laboratory

[关键词] Fermilab Tevatron;43 Particle Accelerators;Plates;Geometry;Beam Position