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Integrated Database Systems for Accelerator Physics: A Framework for Ring and Device Management

This document outlines the three primary categories of databases essential for accelerator physics, focusing on optics, generic devices, and magnet alignment with survey data. It illustrates the development of various databases, like the RHIC and LHC systems, for supporting both on-line and off-line analyses. Key functionalities include generating input files for existing codes, recording machine device status, and managing measurement data. The need for precise magnetic center definitions and corrections highlights the importance of effective data management in modern accelerator facilities.

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Integrated Database Systems for Accelerator Physics: A Framework for Ring and Device Management

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  1. ORNL/BNL Discussion on Database ACCELERATOR PHYSICS VIEW ON RING DATABASE Jie Wei SNS Ring/Transport Lines March 13, 2002

  2. Database functions • Ring databases classified in three categories • Optics Database • Generic Device Database (GDDB) • Magnet, Alignment and Survey Database • From design, to generic devices, to actual elements • Similar database structure as for RHIC (SYBASE) • Magnet, alignment, survey database similarly developed for LHC during US-LHC collaboration • Similar magnet & survey database structure developed for SNS (S. Sathe)

  3. Optics Database • Generate input files to existing codes • Standard Input File (MAD, TEAPOT); TRACE3D; TRANSPORT • DBSF developed for RHIC SYBASE (S. Tepikian) • Magnet strength tables • Aperture • … • Support on-line applications • Transfer matrices; optics editor; … • Support off-line analysis

  4. Example: RHIC Optics database (rhic99)

  5. Generic Device Database • Correlates names (name look-up) • Site-wide name or survey slot names • Assembly name • Serial name for devices • Magnet families • Power supply wire-up • Half-cell type and component • … • Reflects status of the machine device (spares replacement, hook-up) • Record hierarchical structure of the machine

  6. Example: RHIC Generic Device database

  7. Magnet Database • Record measurement data • Serial name, measurement date, run number, type, ... • Transfer function (integral, body, ends) • Field angle, field angle deviation • Multipole error data • Local field map • Quality assurance • Record repair history • Record assembly assignment • Record spare and replacement history • Sorting and installation support

  8. Survey Database • Need to re-define magnetic center • Correct magnet center offset and rolls (offset between magnetic and mechanical center, due to e.g. residual ITF variation) • Record magnet fiducial positions? • BPM center not measured – beam based correction • Re-center & correct magnet misalignment

  9. Example: LHC magnet integral field table

  10. Magnet analysis & survey support • Database for magnet measurement & survey data • Field quality analysis • Corrector strength setting • Magnet sorting • Fiducialization & placement in global coordinate system • Survey & misalignment evaluation • Beam-based correction

  11. Multipole conventions

  12. Example: RHIC magnet database

  13. Example: RHIC survey database

  14. Summary • Three steps: design, generic device, actual measurement • We are already behind (e.g. magnet & survey database) • Fill-up magnet database • Define and record center; be ready for sorting & survey correction • Record repair/rework history; record half-cell assignment • How do we use optics database? • A software to extract lattice file from the database?

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