Performance of nanometre-level resolution cavity beam position monitors and their application in an intra-train beam position feedback system
Proceedings of the 5th International Beam Instrumentation Conference Ibic 2016 (2016) 352-355
Abstract:
A system of three low-Q cavity beam position monitors (BPMs), installed in the interaction point (IP) region of the Accelerator Test Facility (ATF2) at KEK, has been designed and optimised for nanometre-level beam position resolution. The BPMs have been used to provide an input to a low-latency, intra-train beam position feedback system consisting of a digital feedback board and a custom stripline kicker with power amplifier. The feedback system has been deployed in single-pass, multi-bunch mode with the aim of demonstrating intra-train beam stabilisation on electron bunches of charge ~1 nC separated in time by c. 220 ns. The BPMs have a demonstrated resolution of below 50 nm on using the raw measured vertical positions at the three BPMs, and has been used to stabilise the beam to below the 75 nm level. Further studies have shown that the BPM resolution can be improved to around 10 nm on making use of quadrature-phase signals and the results of the latest beam tests will be presented.The development of C-band cavity beam position monitor with a position resolution of nano meter
IPAC 2016 - Proceedings of the 7th International Particle Accelerator Conference (2016) 3149-3151
Abstract:
We developed and tested an C-band beam position monitor with position resolution of nano meter in ATF2. The C-band BPM was developed for the fast beam feedback system at the interaction point of ATF in KEK, in which C-band beam position monitor called to IPBPM (Interaction Point Beam Position Monitor). The average position resolution of the developed IPBPM was measured 10.1nm with 87% of nominal beam charge of ATF. From the measured beam position resolution, we can expect beam position resolution of around 8.8nm with nominal ATF beam charge condition. In this talk, we will describe about the development of IPBPM and the beam test results of nano meter level beam position resolution.AWAKE, The Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN
(2015)
Compact Linear Collider drive beam phase stabilization simulations
Physical Review Special Topics - Accelerators and Beams American Physical Society 18:4 (2015)
Abstract:
The drive beam phase stability is one of the critical feasibility issues of the Compact Linear Collider (CLIC) project. This paper presents a step-by-step analysis of the error propagation through the CLIC drive beam complex using realistic rf potential and beam loading amplitude functions for the drive and main beam accelerating structures. The impact of planned stabilization systems for drive beam bunch charge and longitudinal phase is simulated and the optimal specifications for such systems are calculated and discussed.