Progress Towards Nanometre-Level Beam Stabilisation Using a Cavity BPM System at ATF2

Bromwich, Talitha; Blaskovic Kraljevic, Neven; Bodenstein, Ryan; Burrows, Philip; Christian, Glenn; Perry, Colin; Ramjiawan, Rebecca

doi:10.18429/JACoW-IPAC2017-TUPIK112

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RIS citation export for TUPIK112: Progress Towards Nanometre-Level Beam Stabilisation Using a Cavity BPM System at ATF2

TY - CONF
AU - Bromwich, T.
AU - Blaskovic Kraljevic, N.
AU - Bodenstein, R.M.
AU - Burrows, P.
AU - Christian, G.B.
AU - Perry, C.
AU - Ramjiawan, R.L.
ED - Schaa, Volker RW
ED - Arduini, Gianluigi
ED - Pranke, Juliana
ED - Seidel, Mike
ED - Lindroos, Mats
TI - Progress Towards Nanometre-Level Beam Stabilisation Using a Cavity BPM System at ATF2
J2 - Proc. of IPAC2017, Copenhagen, Denmark, 14â19 May, 2017
C1 - Copenhagen, Denmark
T2 - International Particle Accelerator Conference
T3 - 8
LA - english
AB - A low-latency feedback system has been designed and tested to achieve inter-bunch position stabilisation at the final focus of the Accelerator Test Facility (ATF2) at KEK. This system has now been enhanced through the use of position information from two cavity beam position monitors (BPMs) to enable beam stabilisation at a third, intermediate location where a witness BPM measures the correction. Low-Q cavity BPMs were used, along with custom signal processing electronics designed for low latency and optimal position resolution. A custom stripline kicker, power amplifier and digital feedback board were used to provide beam correction and feedback control. The system was tested in single-pass, multi-bunch mode with the aim of providing inter-bunch beam stabilisation on electron bunches of charge ~1 nC separated in time by 280 ns. In 2015 a single BPM feedback system demonstrated beam stabilisation to below 75 nm. To date the two BPM input feedback system has demonstrated beam stabilisation to 83 ± 6 nm. This performance is limited by the current understanding of the cavity BPM resolution. Work will be described with the aim of improving this result.
PB - JACoW
CP - Geneva, Switzerland
SP - 1986
EP - 1988
KW - feedback
KW - cavity
KW - dipole
KW - kicker
KW - electronics
DA - 2017/05
PY - 2017
SN - 978-3-95450-182-3
DO - 10.18429/JACoW-IPAC2017-TUPIK112
UR - http://jacow.org/ipac2017/papers/tupik112.pdf
ER -