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NUSTAR 4: Ion-optical studies and applications

NUSTAR 4: Ion-optical studies and applications. D. Boutin , C. Brandau, H .Geissel, W. Plass, Z. Podolyak, H. Weick, M. Winkler, M. Yavor. Main activities and results of NUSTAR 4 in 2006. Update of the ion-optical design of a strong focusing system for the Super-FRS target

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NUSTAR 4: Ion-optical studies and applications

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  1. NUSTAR 4: Ion-optical studies and applications D. Boutin, C. Brandau, H .Geissel, W. Plass, Z. Podolyak, H. Weick, M. Winkler, M. Yavor 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  2. Main activities and results of NUSTAR 4 in 2006 • Update of the ion-optical design of a strong focusing system for the Super-FRS target • New design of the Energy Buncher including a spectrometer mode 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  3. Strong focusing system consisting of superferric quadrupole magnets (I) • Main options: single magnets or split magnets • Final spot size in front of Super-FRS target (1  2) mm2 • Studied Br range: 18 – 100 Tm => different phase space • Possibility to use other quadrupole designs (SIS100, Super-FRS, CBM) 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  4. New design using common magnets with the CBM focusing system Length of the small aperture quadrupoles is increased to 1 m, and Bp (max) goes down to 90 Tm, same aperture (0.08 m) Possibility to use normal conducting magnets for Q1 and Q4 (Bmax = 1 T) Q1 Q2 Q3 Q4 Br = 27 Tm 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  5. Layout of Experimental Area (June 2006) MATS/LASPEC DESPEC HISPEC/AGATA MF9 „buncher“ QT additional QT DESPEC Gas-cell • optimal bunching performance(stopping in gas-cell, „low energy“HISPEC) • large degree of flexibility degrader exotic ions from Super-FRS 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  6. Energy/Range Bunching High Resolution mode Brmax = 10 Tm ex = 300 mm mrad ey = 200 mm mrad Angular acceptance 20 / 20 mrad R = 600 Dp/p = +/- 2.5 % sR (Al) ~ 20 mg/cm2 effective range bunching  transmission 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  7. New design with a first-stage high-acceptance spectrometer Main properties: R (xo = 1 mm) = 1146 Dp/p = +/- 10 % Angular acceptance +/- 40 (30) mrad (depends on the target position) Bp(max) = 10 Tm Magnification 0.38 Dispersion 0.88 cm/% 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  8. Two-stage Energy Buncher system Buncher mode compatible with the two-stage system Same properties as described before 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  9. Milestones and deliverables • Report on Energy-Buncher Stage (D21) was delayed because of additional design for a hybrid spectrometer-buncher system. It will be ready in the beginning of 2007. • Report on Strong Focusing systems (D20) is due to end of January 2007 and is in progress. • The Beam Distribution System behind the Energy-Buncher (M9-1) is in construction and will be ready in August 2007. 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

  10. Cost table for NUSTAR 4 08.12.2006, GSI Darmstadt David Boutin, JLU Giessen

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