Technical Design Report Super Fragment Separator

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He flow for cooldown 37.24 Ton iron, Density 7.2 ton/m^3 DRAFT 6.51 m 47 mm (equivalent) Iron TM(x, t) [K], M[Kg/m], CpM [J/kg-K] 0 6 Figure 2.4.132: Schematic of cryogenic distribution for the Super-FRS. Diameter 1.0 m Helium THe(x, t) [K], mHe [Kg/s], CpHe [J/kg-K], VHe [m/s] (0,t) (n-1,t) (n,t) 148
DRAFT With the cooling capacity specification of the FAIR refrigerator CRYO1, numerical simulation has been performed for one multiplet cooldown. Figure 2.4.132 shows the schematic model of the cold mass, mainly iron, and the surrounding helium flow for cooldown. The discrete spaces of the cold mass and helium flow for discrete derivative equations are shown as well. To simulate the practical cooldown process, two limitations have been set up. The first one is that the temperature difference along the cold mass should not be larger than 50 K at any cooldown time. The second one is that the inlet temperature of helium gas is regulated by using one or two linear ramps at the starting phase until the maximum cooling capacity of the FAIR refrigerator CRYO1 is reached. The simulation results of the temperature profile in the cold mass over its length at different cooldown time can be seen in Figure 2.4.133. It is anticipated that two multiplets in one group as shown in Figure 2.4.130 could be cooled down to liquid helium temperature in parallel within about 5 days under the specified full cooling capacity of the FAIR refrigerator CRYO1. Temperature [K] 300 280 260 240 220 200 180 160 140 120 100 80 60 40 20 Temperature profile in cold mass over one multiplet length during its cooldown by using half of the cooling power (117.5 g/s, one half of the full capacity 235 g/s ) of CRYO1 (3.5 kW at 4.5 K) 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 Section [m] 0.5 day 1.0 day 1.5 days 2.0 days 3.0 days 4.0 days 5.0 days Figure 2.4.133: Temperature profile in cold mass of one multiplet for different cooldown times. In order to know if the overall cooldown time of the whole Super-FRS SC magnets is influenced by the different ways of the multiplets' grouping, three grouping ways, i.e., a) 2 multiplets cooldown in parallel in one group (as shown in the Figure 2.4.130), b) 3 multiplets cooldown in parallel in one group, and c) 3 multiplets cooldown in series in one group, have been checked under different cooling powers of refrigerator CRYO1. Table 2.4.31 contains the results in terms of anticipated minimal cooldown time of the Super-FRS. For comparison, the predicted cooldown time of the standard cell and the one sector of LHC have also been listed in the table. One can see that the cooldown for 3 multiplets in parallel (14.5 days) takes about 10% more time than the cooldown in series (13 days) under the same cooling power conditions. The cooldown time for the individual components is highly dependent on the cooling power provided by the refrigerator, and the allowed temperature gradient over cold mass length, rather than the grouping and individuality. The overall cooldown time (about 60 to 70 days) of the whole Super-FRS is more or less determined by the specified cooling capacity of the FAIR refrigerator CRYO1. 149
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DRAFT Technical Design Report Super
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Preface DRAFT The International Fac
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Contents DRAFT 2.4.1 System Design
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DRAFT Table 2.4.1: Parameters of th
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DRAFT degrader stage which provides
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Pre-Separator DRAFT In order to acc
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DRAFT coupling coefficients is give
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DRAFT Table 2.4.3: First-order matr
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DRAFT Main-Separator to the high-en
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DRAFT Table 2.4.5: Transmission T o
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DRAFT Figure 2.4.15: Resolution nec
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DRAFT Figure 2.4.17: Spectrometer m
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DRAFT Table 2.4.8: Design parameter
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DRAFT Figure 2.4.20: Side view of t
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DRAFT Figure 2.4.23: Coil cross-sec
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DRAFT Figure 2.4.25: Flux density d
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Figure 2.4.29: Assembly of two half
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DRAFT Figure 2.4.31: Cross section
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Figure 2.4.34: Sketch of the therma
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DRAFT To fulfill the required field
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DRAFT Figure 2.4.39: The 3D model o
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DRAFT Pole radius mm 100 210 250 25
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DRAFT Figure 2.4.43: Front, side, a
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∆B/B 0.0 DRAFT Figure 2.4.46: Ave
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DRAFT Figure 2.4.50: 3D model of th
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DRAFT Figure 2.4.54 and Table 2.4.1
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DRAFT 2.4.2.3.1 Radiation resistant
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DRAFT The water-cooled radiator con
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DRAFT Table 2.4.17: Coil parameters
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DRAFT Figure 2.4.63: Field distribu
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DRAFT Figure 2.4.65: Multiplet conf
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DRAFT Table 2.4.21 summarizes the r
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2.4.2.6 Current Leads DRAFT The cur
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DRAFT Table 2.4.23 presents the lis
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2.4.3 Power Converters DRAFT The po
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SCR structure DRAFT Regarding high
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a) Chopper circuit 3x400V b) Half b
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External Control System Data transf
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DRAFT Figure 2.4.77: Arrangement of
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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
Page 97 and 98: DRAFT Figure 2.4.90: Setup at the m
Page 99 and 100: DRAFT An overview of the total vacu
Page 101 and 102: 2.4.7.4 Appendix - Technical Drawin
Page 103 and 104: DRAFT Figure 2.4.96: Diagnostic cha
Page 105 and 106: DRAFT Figure 2.4.98: Diagnostic cha
Page 107 and 108: DRAFT Figure 2.4.100: Diagnostic ch
Page 109 and 110: 2.4.8 Particles Sources n/a 2.4.9 E
Page 111 and 112: DRAFT movable, but BC3 must be able
Page 113 and 114: DRAFT Figure 2.4.106: Spot size of
Page 115 and 116: dE/dV [kJ/cm 3 ] 3 2 1 DRAFT includ
Page 117 and 118: 2.4.11.1.4 Design of the beam catch
Page 119 and 120: DRAFT Figure 2.4.110: Calculated eq
Page 121 and 122: DRAFT Figure 2.4.112: Location of b
Page 123 and 124: DRAFT the carbon. Again mainly 7 Be
Page 125 and 126: DRAFT maintenance of the carbon or
Page 127 and 128: DRAFT material) and received the an
Page 129 and 130: DRAFT commissioned in February 2005
Page 131 and 132: DRAFT Table 2.4.28: Typical beam pa
Page 133 and 134: DRAFT Figure 2.4.120: Surface tempe
Page 135 and 136: DRAFT Figure 2.4.123: Schematic lay
Page 137 and 138: DRAFT These results show that the i
Page 139 and 140: DRAFT Like in the case of the rotat
Page 141 and 142: DRAFT Figure 2.4.126: Left: Schemat
Page 143 and 144: DRAFT Figure 2.4.128: Schematic lay
Page 145 and 146: DRAFT Figure 2.4.129: Flow scheme o
Page 147: DRAFT Since the weight of the cold
Page 151 and 152: DRAFT Figure 2.4.134: Schematic of
Page 153 and 154: S1 (a) Figure 2.4.136: (a) Zoom of
Page 155 and 156: 2.4.A Appendix DRAFT The appendix o
Page 157 and 158: DRAFT experiment the EXL community
Page 159 and 160: 2.4.A1.3 Slow control and monitorin
Page 161 and 162: DRAFT Figure 2.4.139: Architecture
Page 163 and 164: DRAFT all FAIR accelerators will be
Page 165 and 166: DRAFT source tier are split in two
Page 167 and 168: DRAFT coupled from the ACS which is
Page 169 and 170: DRAFT 2.4.A3.2 Work packages: descr
Page 171 and 172: 2.4.A3.2.4 Instrumentation Measurin
Page 173 and 174: DRAFT this, planning a network layo
Page 175 and 176: DRAFT 2.4.A3.3 Machine characterist
Page 177 and 178: DRAFT installation of RALF was done
Page 179 and 180: DRAFT The double ring synchrotrons,
Page 181 and 182: DRAFT The first refrigerator, Cryo1
Page 183 and 184: DRAFT shield 28874 + 25 g/s 22 bar
Page 185 and 186: LHe storage Helium storage Helium s
Page 187 and 188: Cryo2 Cryo3 CryoST DB 3 DRAFT Compr
Page 189 and 190: DRAFT The cold connection will be m
Page 191 and 192: DRAFT Measurements planned for each
Page 193 and 194: DRAFT For magnets with less stringe
Page 195 and 196: DRAFT The value, parameters, condit
Page 197 and 198: 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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DRAFT Figure 2.4.164: Schematic lay
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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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Technical Design Report Super Fragment Separator

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