𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Measurement of local impedance by an orbit bump method

✍ Scribed by V. Kiselev; V. Smaluk

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
256 KB
Volume
525
Category
Article
ISSN
0168-9002

No coin nor oath required. For personal study only.

✦ Synopsis

A new method of local transverse coupling impedance measurement has been developed to estimate the impedance distribution along a storage ring. The method is based on measurement of the closed orbit deviation caused by the wake field generated at the impedance location by the off-axis beam. This method provides better accuracy than the known method based on betatron phase advance measurement, because the beam position monitors operate in narrow-band (orbit) mode, but not in wide-band (turn-by-turn) mode used for phase advance measurement. The physical principles and limitations of the method are described using both analytical formulae and computer simulation.

πŸ“œ SIMILAR VOLUMES

An accurate method to measure the antenn
An accurate method to measure the antenna impedance of a portable radio
✍ Y. L. Chow; K. F. Tsang; C. N. Wong πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 128 KB πŸ‘ 3 views

Traditional impedance measurement of a monopole antenna is inaccurate due to a likely stray radiating current on the measuring cable that is also affected by the operating human. This letter demonstrates experimentally that the elimination of this stray current is possible by using a special slee¨e