<?xml version="1.0" encoding="UTF-8"?> <collection xmlns="http://www.loc.gov/MARC21/slim"> <record> <controlfield tag="001">2668989</controlfield> <controlfield tag="005">20210831104251.0</controlfield> <datafield tag="024" ind1="8" ind2=" "> <subfield code="a">oai:cds.cern.ch:2668989</subfield> <subfield code="p">cerncds:FULLTEXT</subfield> </datafield> <datafield tag="037" ind1=" " ind2=" "> <subfield code="a">CERN-ACC-NOTE-2019-0010</subfield> </datafield> <datafield tag="041" ind1=" " ind2=" "> <subfield code="a">eng</subfield> </datafield> <datafield tag="088" ind1=" " ind2=" "> <subfield code="a">CERN-PBC-Notes-2021-007</subfield> </datafield> <datafield tag="100" ind1=" " ind2=" "> <subfield code="a">Balhan, Bruno</subfield> <subfield code="0">AUTHOR|(CDS)2069015</subfield> <subfield code="0">AUTHOR|(SzGeCERN)372234</subfield> <subfield code="u">CERN</subfield> <subfield code="m">Bruno.Balhan@cern.ch</subfield> </datafield> <datafield tag="245" ind1=" " ind2=" "> <subfield code="a">Improvements to the SPS Slow Extraction for High Intensity Operation</subfield> </datafield> <datafield tag="260" ind1=" " ind2=" "> <subfield code="c">2019</subfield> </datafield> <datafield tag="269" ind1=" " ind2=" "> <subfield code="b">CERN</subfield> <subfield code="a">Geneva</subfield> <subfield code="c">26 Mar 2019</subfield> </datafield> <datafield tag="300" ind1=" " ind2=" "> <subfield code="a">87 p</subfield> </datafield> <datafield tag="506" ind1="1" ind2=" "> </datafield> <datafield tag="520" ind1=" " ind2=" "> <subfield code="a">Slow extraction using the third-integer resonance and thin electrostatic septa as used in the SPS to serve the North Area is a process with inherent beam loss. For high-铿倁x 400 GeV protons, the beam losses result in high machine activation, reduced component lifetime and severe limitations on personnel access and maintenance. The instantaneous and integrated loss levels are strong limitations on the annual attainable POT for present operation and for the much higher 铿倁xes requested by SHiP at the proposed BDF facility. In this report the present constraints and potential improvements to the slow extraction system in the SPS are described along with the recent theoretical studies and practical implementation of prospective operational improvements. Machine results of testing of new extraction loss reduction techniques and hardware are presented in the context of SHiP POT requests, SPS BDF and the PBC project and the potential extraction loss reduction factor is evaluated with an outlook to future high intensity operation. The prospects of deployment on the present operational beams and the resulting improvement factors are discussed.</subfield> </datafield> <datafield tag="562" ind1=" " ind2=" "> <subfield code="c">Comments submitted after 31-08-2021 10:42</subfield> </datafield> <datafield tag="595" ind1=" " ind2=" "> <subfield code="a">CERN EDS</subfield> </datafield> <datafield tag="595" ind1=" " ind2=" "> <subfield code="z">UNCL</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="a">Slow extraction,</subfield> <subfield code="9">CERN</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="a">resonance,</subfield> <subfield code="9">CERN</subfield> </datafield> <datafield tag="653" ind1="1" ind2=" "> <subfield code="a">beam loss,</subfield> <subfield code="9">CERN</subfield> </datafield> <datafield 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