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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 - PowerPoint PPT Presentation
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08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
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
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
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 Brange: 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
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)
B = 27 Tm
Q1 Q2 Q3 Q4
08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
Layout of Experimental Area (June 2006)
exotic ions
from Super-FRS MF9
DE
SP
EC
HIS
PE
C/A
GA
TA
+ optimal bunching performance(stopping in gas-cell, „low energy“HISPEC)
+ large degree of flexibility
additional QT „buncher“ QT
DESPEC
Gas-cell
MATS/LASPEC
degrader
08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
Energy/Range Bunching High Resolution mode
Bmax = 10 Tm
x = 300 mm mrad
y = 200 mm mrad
Angular acceptance 20 / 20 mrad
R = 600
p/p = +/- 2.5 %
R (Al) ~ 20 mg/cm2
effective range bunching transmission
0 500 1000 1500 2000 25000
10
20
30
40
50
60 p/p = 1 %
R [ m
g c
m-2 ] in A
l
Resolving Power R [ 2 ]
Range distribution of 78Ni @ 300 MeV/u
327 MeV/u
1 g/cm2 Al Degrader(monoenergetic)
300 MeV/u
R0
= 8.23 mg/cm2
08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
New design with a first-stage high-acceptance spectrometer
Main properties:
R (xo = 1 mm) = 1146
p/p = +/- 10 %
Angular acceptance +/- 40 (30) mrad(depends on the target position)
Bp(max) = 10 Tm
Magnification 0.38Dispersion 0.88 cm/%
08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
Two-stage Energy Buncher system
Buncher mode compatible with thetwo-stage system
Same properties as described before
08.12.2006, GSI Darmstadt David Boutin, JLU Giessen
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
Cost table for NUSTAR 4
NUSTAR4 JLU Giessen University of Surrey (UOS)
GSI
Total EC Contr. Total EC Contr. Total EC contr.
Personnel 102 PM 36 PM 24 PM 12 PM 6 PM
Consumables 17 k€
Total 432 k€ 196 k€ 120 k€ 60 k€ 42 k€
