Technical Design Report Super Fragment Separator

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DRAFT The task of the cryogenic system is to provide the superconducting coils and the cryogenic installations with the required amount of liquid helium. In the next paragraphs the cryogenic system is described in detail consisting of • the refrigerator, • the distribution system, 2.4.A4.2 The Refrigerator Over the last forty years helium refrigeration technology enhanced toward higher reliability and efficiency and lower capital cost. All the major components of the FAIR helium refrigerators have been successfully demonstrated in similar systems [104]. With improved components within the refrigerators nowadays the main suppliers for Helium refrigerators offer plants up to 31 kW. 2.4.A4.2.1 Basic Design The cryogenic system of FAIR will consist of two main helium branches which will work independently in the beginning, but will be cold connected in the ongoing of the project. In addition there will be a cryogenic plant that supplies the series and string test facility also an independent small liquefier for liquid helium supply with transport dewars. Cryo2 CryoST Compressors Figure 2.4.149: The two refrigerators and their locations in the project. Cold connection Cryo1 CryoHeSu 180
DRAFT The first refrigerator, Cryo1, will have a nominal refrigerating capacity of 4.2 kW. During normal operation of the new facility this plant will supply the Super-FRS and all equipment installed in the southern part of the FAIR facility. Cryo2 will supply the synchrotrons (SIS 100 and SIS 300) and parts of the HEBT. The series and string test facility will be supplied by CryoST (Cryo Series Testing). For the high number of small experiments or single small consumers liquid helium will be provided in the central helium supply depot by a separate liquefier CryoHeSu (Cryo Helium Supply). The two refrigerators Cryo1 and Cryo2 will be interconnected by a cold connection to support one another as required. One plant will be sufficient to keep all the cold masses below 80 K during shutdowns. Cryo1 and Cryo2 will share a common compressor station to increase reliability and to avoid two buildings with the very specially demands for a compressor building as noise and vibration protection, maintenance tolls (cranes, etc.), oil-resistant floor covering and groundwater protection. 2.4.A4.2.2 Heat Load for the Refrigerators For the design of the refrigerators the heat loads with the corresponding temperature levels are required. The nominal working temperature for both plants will be 4.4 K at 1.2 bar. The refrigerators will distribute high pressure liquid helium (3.0 bar, 4.6 K) to every user. Each user can operate the local cooling circuit with bath (Super-FRS) or forced flow cooling (two-phase for the SIS 100, one-phase for the SIS 300). The refrigerator supplies only liquid helium and receives low pressure gaseous helium in return. The return gas flow will be: • at 4.4 K in case of the magnet cooling return line, • at ambient temperature in case of current lead cooling. Conventional current leads require that the refrigerator provides liquid helium and gets back gaseous helium at ambient temperature. This refrigeration service is called liquefaction. The refrigerators will also supply a helium cooling stream from about 50 K for the cooling of thermal shields and for the cooling of high temperature superconductor (HTS) current leads. The return flow will have a temperature of 80 K. Table 2.4.34 gives the sum of head loads for different consumers [105,106] splitted into the different refrigerators. Table 2.4.34: Heat loads for FAIR (including safety factor). Plant Consumer Heat load [kW] Cryo1 Further Consumers 0.23 Super-FRS 1.40 Experiments 0.17 SIS 100 1.0 4.19 Cryo2 Further Consumers 1.91 181
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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
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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
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 145 and 146: DRAFT Figure 2.4.129: Flow scheme o
Page 147 and 148: DRAFT Since the weight of the cold
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: DRAFT The double ring synchrotrons,
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
Page 199 and 200: DRAFT The Quench Heaters Tests has
Page 201 and 202: DRAFT Figure 2.4.159: Photograph of
Page 203 and 204: DRAFT The field properties listed i
Page 205 and 206: DRAFT Figure 2.4.161: Schematic vie
Page 207 and 208: DRAFT Figure 2.4.162: Scheme of the
Page 209 and 210: 2.4.A6.2.2 Shielding against direct
Page 213 and 214: DRAFT Figure 2.4.165: An iron beam
Page 215 and 216: DRAFT In a side view the flux of pr
Page 217 and 218: DRAFT catcher 7 Be, 22 Na and 24 Na
Page 219 and 220: DRAFT at the FRS (2·10 9 /spill as
Page 221 and 222: DRAFT [1] H. Geissel et al., Nucl.
Page 223 and 224: DRAFT [74] A. Fabich and J. Lettry,
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Technical Design Report Super Fragment Separator

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