Update on the JLEIC pCDR JLEIC Collaboration Meeting April 13 2019 1 Todd Satogata CASA Accelerator Division pCDR65 FY18 delivery and pCDR100 FY19 development One Year Ago 2 Deliver preCDR to Jefferson Lab leadership by end FY18 ID: 773294
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Update on the JLEIC pCDR JLEIC Collaboration Meeting April 1-3, 2019 1 Todd SatogataCASAAccelerator Division pCDR-65 FY18 deliveryandpCDR-100 FY19 development
One Year Ago… 2 Deliver pre-CDR to Jefferson Lab leadership by end FY18ObjectivesDocument a JLEIC self-consistent designUpdate, integrate, expand previous documents Document enough detail for reasonable costingEstablish infrastructure to maintain consistencyEstablish documentation trail and reference tech note seriesBalance deliverable scope with resourcesMeta-objectiveEstablish team and infrastructure for anticipated CDR
End of FY18 3 Deliver pre-CDR to Jefferson Lab leadership by end FY18ObjectivesDocument a JLEIC self-consistent designUpdate, integrate, expand previous documents Document enough detail for reasonable costingEstablish infrastructure to maintain consistencyEstablish documentation trail and reference tech note seriesBalance deliverable scope with resourcesMeta-objectiveEstablish team and infrastructure for anticipated CDRObjectivesAchieved!!
Overview JLEIC pCDR-65Draft delivered end FY18 to JLab Leadership100 GeV hadron complex, = 65 GeV408pp 12 chapters, 2 appendicesConsistent with August 2018 costing exerciseJLEIC pCDR-100Draft in development, due late April 2019200 GeV hadron complex, = 100 GeVA full-document revision of pCDR-65~400pp 12 chapters, 1 appendixCost-neutral relative to pCDR-65All machines updated except ion sourcesOver 35 contributors, over 10 reviewers4
pCDR-65 Chapters 1-2 5 Chapter 1 Essentials of facility motivation and contextDesign capabilities and comparison to requirements (e.g. white paper)Luminosity curvesFacility high-level overviewSite planDocument structure and overviewChapter 2Nuclear physics motivationsReiteration of white paper requirementsEmphasis on nuclear femtographyExtended physics requirementsJustification for high luminosity motivation
pCDR-65 Chapter 3 6 Chapter 3 Fundamental design goalsDesign conceptsLuminosityPolarizationHigh-level performance table
pCDR-65 Chapters 4-5 7 Chapters 4-5 Core machine design chaptersElectron and ion complexesSources and transport linesCollider ringsChromatic control schemesMultipole tracking tolerancesDA for electron top-offPolarizationspin rotators, spin control
pCDR-65 Chapter 6 Chapter 6Staged electron cooling conceptAdvantage of new ion complexThree separate coolers Conventional low-energy DC coolerState-of-the-art high energy DC coolerCollider ERL coolerERL-cooler specific componentse.g. harmonic kicker 8
pCDR-65 Chapter 7 Chapter 7Interaction region requires separate chapterDesign concept including forward taggingAuthored by IR working group Includes accelerator, nuclear physicsIncludes MDI 9
pCDR-65 Chapter 8 Chapter 8Beam dynamics relevant to collider complex and luminosity goalsSynchronizationCrabbing dynamics and tolerances Beam-beam and collective effectsIncluding gear changing 10
pCDR-65 Chapters 9-10 Chapters 9-10Technical and conventional systemsSystems engineeringComponent preliminary designs Subsystem counts, infrastructure estimatesSite utilities and code requirements 11
pCDR-65 Chapters 11-Appendices 12 Chapters 11-12 Cryogenic requirement estimates Heat loads and plant subsystemsESHRadiation control requirementsAppendix AAlternative design for 100 GeV center of mass facilityEngineering and facility design estimatesSome of basis of pCDR-100 design
Summary JLab pCDR efforts span well over a yearpCDR-65 draft developed and delivered to lab management at end of FY18 Essentially a frozen reference designConsistent with DOE costing exercise Aug 2018Lab management decided to flesh out 100 GeV option to full pCDR update in FY19Cost-neutral to Aug 2018 designWarm ion low/high energy boosters Electron collider ring reuse of PEP-II magnetsOn track for delivery late April 201913