In this contribution, we describe the advantages of the pilot tone compensation technique that we implemented in a new BPM prototype. Injecting a fixed reference tone upstream of cables allows for a continuous calibration of the system, compensating the different behaviour of every channel due to thermal drifts, variations of cable properties, mismatches and tolerances of components.
Another...
Abstract
Based on the demand of high energy photo source(HEPS), the goal of digital Beam position monitor(BPM) electronics is to develop a high precision beam control and measurement system, which can make the precise measurement of turn-by-turn (TBT) data, fast acquisition(FA) data, Slow acquisition (SA) data and closed orbit data (COD) data.
The hardware architecture of digital BPM includes...
Libera Brilliance+ is the third generation of BPM electronics which have been running in several light sources around the world. It's adaptive signal processing based on either frequency or time domain provided flexibility to measure both turn-by-turn and single bunch beam position. Furthermore, the long-term stabilization concept based on the crossbarswitch enabled it to achieve the stability...
There are proposals to utilize the energy recovery linac (ERL) as driver for the light sources with ultra-low emittance. The ERLs have co-propagating beams inside the same vacuum vessel. These beams can have different trajectories, which should be distinguished by beam position monitors (BPM). In this paper we present a concept of a BPM utilizing the phase information for calculation...
The design study of new button-type beam position monitor (BPM) is performed for a high accuracy bunch-by-bunch BPM system. Particularly it is mainly to compensate the influence of ringing signal which causes the misreading of the beam position of following bunches. The ringing is produced by the combined effect of an impedance mismatching inside the button and trapped TE-mode inside the...
NSLS-II in-house developed BPM systems provide better than 200nm resolution and sub-micron long-term position stability, combined with the high-temperature stability of the storage ring tunnel, electronic racks, sophisticated support structures and orbit feedback. The talk will start with brief introduction of the NSLS-II BPM button and electronics design and achieved performances. The talk...
