JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@unpublished{lamaack:ibic2023-mop021,
author = {J.L. Lamaack and A. Bardorfer and L. Bogataj and M. Cargnelutti and H.T. Duhme and G. Kube and P. Leban and M.O. Oblak and P. Paglovec and B. Repič and F. Schmidt-Föhre and K. Wittenburg},
% author = {J.L. Lamaack and A. Bardorfer and L. Bogataj and M. Cargnelutti and H.T. Duhme and G. Kube and others},
% author = {J.L. Lamaack and others},
title = {{New Beam Position Monitor System for PETRA IV}},
% booktitle = {Proc. IBIC'23},
booktitle = {Proc. Int. Beam Instrum. Conf. (IBIC'23)},
language = {english},
intype = {presented at the},
series = {International Beam Instrumentation Conference},
number = {12},
venue = {Saskatoon, Canada},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {12},
year = {2023},
note = {presented at IBIC'23 in Saskatoon, Canada, unpublished},
abstract = {{The PETRA IV project at DESY aims to upgrade the present synchrotron radiation source PETRA III into a source of ultra-low emittance with target emittance of 20 pmrad. The small beam emittance translates directly into much smaller beam sizes of about 7 microns horizontally and 3 microns vertically at insertion device source points, thus imposing stringent requirements on the machine’s stability. In order to measure beam position and control orbit stability to the required level of accuracy, a high-resolution BPM system consisting of 790 individual monitors will be installed. Its readout electronics will be based on MTCA.4 as a technical platform. To fulfill the long-term drift requirement (< 1 micron over 7 days), the concept of crossbar-switching was extended in such a way that the RF switch matrix is separated from the readout electronics and placed as close to the BPM pickup as possible, therefore enabling additional stabilization of the RF cables. At present, a fully populated MTCA.4 crate with 6 AMC boards for the readout of 12 BPMs is installed at PETRA III and extensively tested. This contribution summarizes the latest measurements of the long term stability.}},
}