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SIS 18-6 Charge Separator W. Barth

SIS 18-6 Charge Separator W. Barth. L. Heyl, J. Glatz, M. Kaiser, Ch. Will +. Introduction Present Charge Separation System Advanced Beam Dynamics Layout Technical Layout Project Status Modified working plan Manpower, Costs. The GSI UNI versal L inear AC celerator.

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SIS 18-6 Charge Separator W. Barth

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  1. SIS 18-6 Charge SeparatorW. Barth L. Heyl, J. Glatz, M. Kaiser, Ch. Will + ... • Introduction • Present Charge Separation System • Advanced Beam Dynamics Layout • Technical Layout • Project Status • Modified working plan • Manpower, Costs

  2. The GSI UNIversal Linear ACcelerator Single Gap Resonators Alvarez High Current Injector

  3. Transfer Line to the SIS 18 Single Gap Resonators Charge State Analysis to SIS 18 Foil-stripper FAIR: 40 emA (1490 kW)

  4. Present Charge Separation System Foilstripper 25m • Stripper-system consisting of 3 pathways • 25m space charge dominated beam transport for the stripped beam (multi charge state beam) leads to significant emittance growth • Charge analyzing system (11-dipole) with a resolution of 1.5% is sufficient for low intensity beams with only small emittance areas • Difficult beam optimization for transport from the stripper to the charge separation.

  5. New Charge Separator-Concept • Compact (6m) system of four vertical 35-1.6 T-dipole magnets (field homogeneity  1.5 %) • Sufficient for pulse operation: 3 Hz pulsed mode, 5 Hz demand mode • Dipole chamber with low eddy currents in pulse operation, copper walls and apertures for low radioactivity from the impact of unwanted charge states, cooling and protection from thermal stress • Stripper-system integrated • Short (space charge dominated) beam transport (multi charge state beam): 1m • less emittance growth • Intensity gain inside SIS-acceptance  20% • Charge-resolution ≤ 1% • Improved beam operating

  6. Stripper Concept with (more than) 3 Pathways Foil exchanger (20 stripper foils) 1. 2. 3. Low Current Operation No Stripping High Current Operation High Current Operation (FAIR) Quadrupole

  7. New Charge Seperator: Beam Dynamics I horizontally Stripper Foil for high current heavy ion operation (sweeper) ... for medium current operation (sweeper) Kicker 2 ... for low current operation (kicker) Sweeper 2

  8. New Charge Seperator: Beam Dynamics II vertically

  9. New Beam Diagnostics Test Bench profile grid quadrupole duplett hor./vert. slit h/v-steerer beamdump • ion current • beam profile • position (correction) • beam emittance • bunch structure (non destructive) • beam energy

  10. Technical Layout/Overview no change no change reused components + beam transformers + phase probes (double-) kicker 3 kicker 2 beam dump quad-doublet dipole 3&4 dipole 1&2 beam diagnostic boxes (emittance measurement) beam diagnostic box (profile grid, analyzing slit) steerer

  11. list of components

  12. Status/component list

  13. Dipole magnets • 01/2006 specification • 02/2006 call for tender • 04/2006 ordering • 12/2006 delivery to GSI segment (for dipole 1) dipole 3 dipole 4 dipole 2 dipole 1

  14. Dipole chambers water cooling copper layers copper layers copper layers

  15. Technical Layout Charge separator system New beam diagnostics test bench

  16. Project Status Components cooling water (esimated for LASEP+beam diagnostics bench) • advanced beam dynamics fixed • new beam diagnostics test bench design/techn. layout • dipoles ordered • most of the components in house/ordered • dipole chamber (specs, call for tender, ordering) 2007 • carriage system (specs, call for tender, ordering) 2007 • preparation of controls system • additional beam diagnostics defined, partly ordered • technical layout/drawings of the whole beam line • shutdown planning 2007 • planning of infrastructure (media, cable) started • no show stoppers

  17. Working Plan (pre-)assembly of the complete charge separator Insertion in the transfer line

  18. Investment, personnel • steerer (24 k€) • phase probe (5 k€) • SEM-grid (11 k€) • High current slits (23 k€) • techn. layout/ext. (15 k€) (basic approach: 465 k€) EU-personal hired: • techn. (3Y), 01/03/2006 • eng. (3 Y/50%), 01/02/2006 GSI-personal: - scientist (50 %) - task 5/senior scientist (temporarily)

  19. Beam Dynamics III Emittance Growth L. Groening Charge Separation

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