Technical Design Report Super Fragment Separator

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DRAFT This leads to the design of a superferric magnet with warm iron (minimum cold mass, option → reduced cool down time) and potted (or vacuum-impregnated) low-current coils, wound with monolithic wire. Dipoles of this type are installed in the A1900 Fragment-Separator at MSU. The dipole magnets in the Main-Separator of the Super-FRS have a bending radius of 12.5 m and a maximum flux density of 1.6 T. Each dipole stage is build by 3 dipoles units having a deflection angle of 11° (Pre-Separator) and 9.75° (Main-Separator), respectively, which results in an effective path length of about 2.39 m (Pre-Separator) and 2.13 m (Main-Separator). We investigated several options for the iron design such as a C-shaped magnet, a D-shaped magnet, and a straight (rectangular) magnet. Advantages and disadvantages are summarized in Table 2.4.9. Considering the short length of one magnet unit the straight version is by far the simplest to fabricate. Table 2.4.9: Pros and cons of different magnet designs. C-shaped D-shaped Straight Pro 'minimum iron' solution Con difficult and expensive winding process due to negative curvature coil no negative curvature winding Variation of the lamination cross section along the magnet length no negative curvature winding pole widened by sagitta : 'maximum iron' solution The prototyping of a superferric dipole magnet is under way in collaboration with the FAIR China Group of the Chinese Academie of Science. Magnetic design The 2D/3D magnetic design for the dipole units was performed using the code Opera-2D/3D [15]. Figure 2.4.24 shows the cross section of the lamination. Air slots are introduced to guarantee the required field quality over the whole range of operation from 0.1 to 1.6 T (see Figure 2.4.25). Solid iron end blocks could be used to make the entrance and exit edge angles. The coil consists of 1080 turns of a NbTi/Cu monolith conductor (Cu/SC ratios ≈ 9) with a conductor size of (1.1 x 2.2) mm 2 . Figure 2.4.24: Cross section (1/4 part) of a superferric dipole magnet. 30
DRAFT Figure 2.4.25: Flux density distribution along the border of the good field area (2D calculation) for the magnet shown in Figure 2.4.24. The influence of the coil positioning as well as the tolerance of the pole gap was investigated. To achieve the required field homogeneity it turns out that the coil position must be better than ± 1 mm and the tolerance on punching the laminations must be less than ± 0.08 mm for the pole gap. Punching die and punching sheets The punching sheet width is 2200 mm, the height is 725 mm and the thickness is 0.5 mm resulting in a weight of 5.65 kg per lamination. The accuracy has to be better than ± 80 µm which requires a punching die, similar to the one shown in Figure 2.4.26. Figure 2.4.26: The different steps of the punching die assembling. 31
Page 1 and 2: DRAFT Technical Design Report Super
Page 3 and 4: Preface DRAFT The International Fac
Page 5 and 6: Contents DRAFT 2.4.1 System Design
Page 7 and 8: DRAFT Table 2.4.1: Parameters of th
Page 9 and 10: DRAFT degrader stage which provides
Page 11 and 12: Pre-Separator DRAFT In order to acc
Page 13 and 14: DRAFT coupling coefficients is give
Page 15 and 16: DRAFT Table 2.4.3: First-order matr
Page 17 and 18: DRAFT Main-Separator to the high-en
Page 19 and 20: DRAFT Table 2.4.5: Transmission T o
Page 21 and 22: DRAFT Figure 2.4.15: Resolution nec
Page 23 and 24: DRAFT Figure 2.4.17: Spectrometer m
Page 25 and 26: DRAFT Table 2.4.8: Design parameter
Page 27 and 28: DRAFT Figure 2.4.20: Side view of t
Page 29: DRAFT Figure 2.4.23: Coil cross-sec
Page 33 and 34: Figure 2.4.29: Assembly of two half
Page 35 and 36: DRAFT Figure 2.4.31: Cross section
Page 37 and 38: Figure 2.4.34: Sketch of the therma
Page 39 and 40: DRAFT To fulfill the required field
Page 41 and 42: DRAFT Figure 2.4.39: The 3D model o
Page 43 and 44: DRAFT Pole radius mm 100 210 250 25
Page 45 and 46: DRAFT Figure 2.4.43: Front, side, a
Page 47 and 48: ∆B/B 0.0 DRAFT Figure 2.4.46: Ave
Page 49 and 50: DRAFT Figure 2.4.50: 3D model of th
Page 51 and 52: DRAFT Figure 2.4.54 and Table 2.4.1
Page 53 and 54: DRAFT 2.4.2.3.1 Radiation resistant
Page 55 and 56: DRAFT The water-cooled radiator con
Page 57 and 58: DRAFT Table 2.4.17: Coil parameters
Page 59 and 60: DRAFT Figure 2.4.63: Field distribu
Page 61 and 62: DRAFT Figure 2.4.65: Multiplet conf
Page 63 and 64: DRAFT Table 2.4.21 summarizes the r
Page 65 and 66: 2.4.2.6 Current Leads DRAFT The cur
Page 67 and 68: DRAFT Table 2.4.23 presents the lis
Page 69 and 70: 2.4.3 Power Converters DRAFT The po
Page 71 and 72: SCR structure DRAFT Regarding high
Page 73 and 74: a) Chopper circuit 3x400V b) Half b
Page 75 and 76: External Control System Data transf
Page 77 and 78: DRAFT Figure 2.4.77: Arrangement of
Page 79 and 80: SuperFRS Power Supply Effective App
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DRAFT The locations for the differe
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DRAFT Figure 2.4.80: Beam induced f
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DRAFT Figure 2.4.82: Two hybrids ca
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DRAFT Figure 2.4.84: Left panel: TP
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DRAFT extracted beams. Its use for
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Time of Flight measurement DRAFT At
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DRAFT together. Another option is t
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DRAFT Figure 2.4.88: Pillow seal po
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DRAFT Figure 2.4.90: Setup at the m
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DRAFT An overview of the total vacu
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2.4.7.4 Appendix - Technical Drawin
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DRAFT Figure 2.4.96: Diagnostic cha
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DRAFT Figure 2.4.98: Diagnostic cha
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DRAFT Figure 2.4.100: Diagnostic ch
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2.4.8 Particles Sources n/a 2.4.9 E
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DRAFT movable, but BC3 must be able
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DRAFT Figure 2.4.106: Spot size of
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dE/dV [kJ/cm 3 ] 3 2 1 DRAFT includ
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2.4.11.1.4 Design of the beam catch
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DRAFT Figure 2.4.110: Calculated eq
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DRAFT Figure 2.4.112: Location of b
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DRAFT the carbon. Again mainly 7 Be
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DRAFT maintenance of the carbon or
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DRAFT material) and received the an
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DRAFT commissioned in February 2005
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DRAFT Table 2.4.28: Typical beam pa
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DRAFT Figure 2.4.120: Surface tempe
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DRAFT Figure 2.4.123: Schematic lay
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DRAFT These results show that the i
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DRAFT Like in the case of the rotat
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DRAFT Figure 2.4.126: Left: Schemat
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Page 145 and 146:
DRAFT Figure 2.4.129: Flow scheme o
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DRAFT Since the weight of the cold
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DRAFT With the cooling capacity spe
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DRAFT Figure 2.4.134: Schematic of
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S1 (a) Figure 2.4.136: (a) Zoom of
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2.4.A Appendix DRAFT The appendix o
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DRAFT experiment the EXL community
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2.4.A1.3 Slow control and monitorin
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DRAFT Figure 2.4.139: Architecture
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DRAFT all FAIR accelerators will be
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DRAFT source tier are split in two
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DRAFT coupled from the ACS which is
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DRAFT 2.4.A3.2 Work packages: descr
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2.4.A3.2.4 Instrumentation Measurin
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DRAFT this, planning a network layo
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DRAFT 2.4.A3.3 Machine characterist
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DRAFT installation of RALF was done
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DRAFT The double ring synchrotrons,
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DRAFT The first refrigerator, Cryo1
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DRAFT shield 28874 + 25 g/s 22 bar
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LHe storage Helium storage Helium s
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Cryo2 Cryo3 CryoST DB 3 DRAFT Compr
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DRAFT The cold connection will be m
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DRAFT Measurements planned for each
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DRAFT For magnets with less stringe
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DRAFT The value, parameters, condit
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DRAFT 3. Geometry tests For cryosta
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DRAFT The Quench Heaters Tests has
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DRAFT Figure 2.4.159: Photograph of
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DRAFT The field properties listed i
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DRAFT Figure 2.4.161: Schematic vie
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DRAFT Figure 2.4.162: Scheme of the
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2.4.A6.2.2 Shielding against direct
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Page 213 and 214:
DRAFT Figure 2.4.165: An iron beam
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DRAFT In a side view the flux of pr
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DRAFT catcher 7 Be, 22 Na and 24 Na
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DRAFT at the FRS (2·10 9 /spill as
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DRAFT [1] H. Geissel et al., Nucl.
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DRAFT [74] A. Fabich and J. Lettry,
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