Technical Design Report Super Fragment Separator

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DRAFT In the feedbox unit there are in total seven headers which stretch over the full length of the feedbox unit. Three of them are the process tubing for the cryogenic circuit interconnections among the three dipole cryostats and the remaining four are the process tubing with general purpose of cryogenic fluid transfer. In fact, the feedbox unit has five interface connections of two types, three jumper interconnections to the magnet cryostats as type one and two cryogenic transfer line interconnections as type two. Both types of interconnections are of 4-header inner configuration but with different dimensions. If the length of the feedbox unit is not a limitation from the manufacture point of view, it should be designed and fabricated as one standard module. 2.4.12.2 Cryogenics for multiplets/quadrupoles In the Super-FRS there are 118 superconducting quadrupoles and hexapoles located in between every two groups of dipoles and in front of the Super-FRS target region. In the Main-Separator, usually five neighboring quadrupoles / hexapoles form a multiplet. This is installed in one single cryostat with a length up to 7 m and cooled in a liquid helium bath. The multiplet has a cold iron mass up to 37 tons. Therefore high cooling capacity is required to cool down such magnets. It is foreseen that one feedbox unit controls the liquid helium distribution for two multiplet cryostats. Figure 2.4.130 shows the flow scheme of two neighboring multiplets and the corresponding feedbox for the cryogenic supply. The feedbox unit is identical to the one for the dipole units except that only two jumpers are needed. Figure 2.4.130: Flow scheme of two Super-FRS multiplets and one feedbox unit. 146
DRAFT Since the weight of the cold mass in a multiplet is by a factor of 10 larger than in the dipole units, the cooldown time of the Super-FRS superconducting magnets is mainly determined by the time which is needed to cool down 23 multiplets and some 10 individually located quadrupoles and hexapoles; in total about 1100 tons cold mass. Experience from NSCL, MSU shows that the single A1900 dipole which has a similar size compared to the Super-FRS dipole could be cooled down to liquid helium temperature within one day. Therefore one needs to specify cooling capacity for the FAIR refrigerator CRYO1 in order to cool down about 1100 tons cold mass (about 100 tons for 28 dipoles included) in the Super-FRS within a reasonable cooldown time. In fact, the total weight of 1100 tons cold mass in the Super-FRS is about one-fourth of the cold mass of 4600 tons of one LHC sector. The preliminary specification of cooling capacity for the FAIR refrigerator CRYO1 has been based on the specification of the LHC sector refrigerator (18 kW at 4.5 K). The FAIR refrigerator CRYO1 is specified to provide cooling power of 3.5 kW at 4.5 K. This corresponds to a maximum helium mass flow rate of 235 g/s available at the cycle compressors. From 300 K to about 220 K, the cooling power of the refrigerator CRYO1 is specified to be about 110 kW at its maximum capacity which is mainly contributed by the LN2 pre-cooling in the first heat exchanger of the CRYO1 cold box. Figure 2.4.131 shows the assumed cooling power capacity change of the CRYO1 refrigerator over the refrigeration temperature from 300 K to 10 K which is based on the commissioning results of the LHC 18 kW refrigerator. Cooling capacity [kW] 120 110 100 90 80 70 60 50 40 30 20 10 Assumed relation between cooling power and refrigeration temperature for FAIR CRYO1 (3.5 kW, 4.5 K) based on the specification of LHC sector refrigerator 0 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Temperature [K] Figure 2.4.131: Specified cooling capacity of refrigerator CRYO1. Maximum cooling capacity [kW] 147
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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
Page 95 and 96: 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: DRAFT Figure 2.4.129: Flow scheme o
Page 149 and 150: DRAFT With the cooling capacity spe
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
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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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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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