<?xml version="1.0" encoding="UTF-8"?> <collection xmlns="http://www.loc.gov/MARC21/slim"> <record> <controlfield tag="001">2883821</controlfield> <controlfield tag="003">SzGeCERN</controlfield> <controlfield tag="005">20231214205416.0</controlfield> <datafield tag="024" ind1="7" ind2=" "> <subfield code="2">DOI</subfield> <subfield code="9">JACOW</subfield> <subfield code="a">10.18429/JACoW-IPAC2023-WEPL027</subfield> </datafield> <datafield tag="024" ind1="8" ind2=" "> <subfield code="a">oai:cds.cern.ch:2883821</subfield> <subfield code="p">cerncds:FULLTEXT</subfield> <subfield code="p">cerncds:CERN:FULLTEXT</subfield> <subfield code="p">cerncds:CERN</subfield> </datafield> <datafield tag="035" ind1=" " ind2=" "> <subfield code="9">https://inspirehep.net/api/oai2d</subfield> <subfield code="h">2023-12-13T05:31:31Z</subfield> <subfield code="m">marcxml</subfield> <subfield code="a">oai:inspirehep.net:2716686</subfield> <subfield code="d">2023-12-12T09:21:19Z</subfield> </datafield> <datafield tag="035" ind1=" " ind2=" "> <subfield code="9">Inspire</subfield> <subfield code="a">2716686</subfield> </datafield> <datafield tag="041" ind1=" " ind2=" "> <subfield code="a">eng</subfield> </datafield> <datafield tag="100" ind1=" " ind2=" "> <subfield code="a">Carli, C</subfield> <subfield code="u">CERN</subfield> </datafield> <datafield tag="245" ind1=" " ind2=" "> <subfield code="9">JACOW</subfield> <subfield code="a">Limitations of radial magnetic field estimates from counter-rotating beams in an electro-static EDM ring</subfield> </datafield> <datafield tag="260" ind1=" " ind2=" "> <subfield code="c">2023</subfield> </datafield> <datafield tag="300" ind1=" " ind2=" "> <subfield code="a">4 p</subfield> </datafield> <datafield tag="520" ind1=" " ind2=" "> <subfield code="9">JACOW</subfield> <subfield code="a">Proposals to measure a possible Electric Dipole Moment (EDM) of protons in an electro-static machine are studied by a world-wide community. The machine is operated at the so-called magic energy to satisfy the "frozen spin" condition such that, without imperfections and the well-known magnetic moment of the particle, the spin is always oriented parallel or antiparallel to the direction of movement. The effect of a finite EDM is a build-up of a vertical spin component. A small average radial magnetic field leads as well to a build-up of a vertical spin component, which cannot be disentangled from the effect due to a finite EDM, and thus generates a systematic error of the measurement. Essential ingredients of the concept are to install the machine inside a state-of-the-art magnetic shielding and to measure the vertical orbit separation of two counter-rotating beams, enhanced by choosing a very low vertical tune, with high precision pick-ups. In this paper, we analyse limitations of this method and, in particular, the impact of wanted ("strong focusing" lattice) and unwanted variations of the betatron functions and of coupling.</subfield> </datafield> <datafield tag="540" ind1=" " ind2=" "> <subfield code="a">CC-BY-4.0</subfield> <subfield code="b">JACOW</subfield> <subfield code="u">https://creativecommons.org/licenses/by/4.0</subfield> </datafield> <datafield tag="650" ind1="1" ind2="7"> <subfield code="2">SzGeCERN</subfield> <subfield code="a">Accelerators and Storage Rings</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="9">author</subfield> <subfield code="a">focusing</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="9">author</subfield> <subfield code="a">lattice</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="9">author</subfield> <subfield code="a">betatron</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="9">author</subfield> <subfield code="a">proton</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="9">author</subfield> <subfield code="a">dipole</subfield> </datafield> <datafield tag="690" ind1="C" ind2=" "> <subfield code="a">ARTICLE</subfield> </datafield> <datafield tag="690" ind1="C" ind2=" "> <subfield code="a">CERN</subfield> </datafield> <datafield tag="700" ind1=" " ind2=" "> <subfield code="a">Cilento, V</subfield> <subfield code="u">CERN</subfield> </datafield> <datafield tag="773" ind1=" " ind2=" "> <subfield code="c">WEPL027</subfield> <subfield code="q">IPAC2023</subfield> <subfield code="w">C23-05-07</subfield> <subfield code="y">2023</subfield> <subfield code="p">JACoW IPAC</subfield> <subfield code="v">2023</subfield> </datafield> <datafield tag="856" ind1="4" ind2=" "> <subfield code="8">2499678</subfield> <subfield code="s">485231</subfield> <subfield code="u">http://cds.cern.ch/record/2883821/files/document.pdf</subfield> <subfield code="y">Fulltext</subfield> </datafield> <datafield tag="960" ind1=" " ind2=" "> <subfield code="a">13</subfield> </datafield> <datafield tag="962" ind1=" " ind2=" "> <subfield code="b">2858945</subfield> <subfield code="n">venice20230507</subfield> <subfield code="k">WEPL027</subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">ARTICLE</subfield> </datafield> <datafield tag="980" ind1=" " ind2=" "> <subfield code="a">ConferencePaper</subfield> </datafield> </record> </collection>