Technical Design Report Super Fragment Separator

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DRAFT • Resistance and Inductance Tests. • Continuity and Instrumentation Tests. Stage 3 - Final Evaluation Board All results of the tests have to be presented to the "Final Evaluation Board". This board will finally accept or reject a magnet based on the fulfilment of machine requirements by the magnet performance. This board can request to further test magnets not performing within the specifications. This investigation will require special diagnostic and measurement methods like Time Domain Reflectometry, High Voltage Discharge, and Partial Discharge. Further a set of expected signals has to be built along with an electrical model of each individual magnet (only practicable for magnets built in series). Power Test After the magnet has been cooled down and the integrity of its instrumentation is checked, the magnet current is ramped up until it either reaches the ultimate current or a portion of the superconductor becomes normal conducting (called quench). In the first case the magnet is successfully trained. In the later case the magnetic energy is transformed into thermal energy. Then the magnet needs to be cooled down again and the procedure has to be repeated until the ultimate current is reached. Pulsed magnets need to be checked additionally if they can be ramped without quenching. The First and Second Run Criterion are to be applied for power test. The First Run Criterion (FRC) states that magnet has to reach the nominal current (as a pulse and quasi DC) before certain numbers of quench (will be specified after pre-series magnet testing, for example 4). If the magnet does not fulfil FRC is should be submitted to a Second Thermal Cycle. For such magnets the Second Run Criterion (SRC) has to be applied. The SRC states that the level of the first quench during 2 nd run has to be above the first quench during the 1 st run and the magnet has to reach the nominal current (as a pulse and quasi DC) before certain numbers of quench (will be specified after pre-series magnet testing). Electrical Tests The integrity of the magnet instrumentation (voltage taps, thermometers) and electrical insulation has to be checked regularly to guarantee safety operation. These are typically performed after magnet reception, installing the magnet on the test bench, cool down, magnet training and warm up. The Insulation Test of each electrical circuit versus ground and between independent electrical circuits has to be performed if there is a mechanical contact between them. An insulation test has to be performed after each step which can affect the insulation quality; at least after completion of each stage. General measurement method is the high voltage DC test. The Resistance and Inductance Tests have to be performed after each step which changes the electrical configuration of the circuit and after any action which can affect the insulation of the circuit. General measurement methods are DC resistance measurement, AC impedance measurement, and high voltage discharge test The Continuity and Instrumentation Tests has to be performed after each step which can affect the mechanical and electrical integrity of the electrical circuit (magnet and sensors). Especially the instrumentation has to be checked after each step involving mechanical or thermal contraction. The DC resistance measurements (or voltage drop) on the circuit allow detecting possible broken connections (instrumentation). 198
DRAFT The Quench Heaters Tests has to be performed for all magnets equipped with quench heaters. Some of the SIS100 quadrupole (6) are equipped with quench heaters. Quench heaters have to be powered after each action which can affect the integrity of its circuits (after QH installation, cryostating and installation on the test bench). The voltage and current of the Quench Heater Test must correspond to defined patterns. These guarantee proper QH performance and assert that the QH will release sufficient amount of energy to warm up the magnet during the quench. Vacuum and Leakage Tests The leakage of the cryostat has to be tested and has to show a leak rate better than 10 -8 mbar/s. Also all helium process lines should have a leak rate better than 10 -8 mbar/s. The helium process volumes will be checked with a pressure 1.4 times higher than the design pressure. Cold Magnetic Measurements Cold magnetic measurements are performed with the magnet at operating (cryogenic) temperatures while the measuring equipment is working at room temperature. Anti-cryostats are inserted in magnets with a cold bore (the SIS 100, SIS 300 and HESR magnets), wherein the measurement equipment is placed. The use of a non-metallic anti-cryostat is preferred over a metallic warm bore (e.g. used for LHC series measurements) to avoid additional eddy current losses in fast-ramped magnets, which also affect the quality of the measurement. For other magnet types only the coils are housed in a cryostat, the iron of the pole shoes and the bore is at room temperature. The quantities to be measured are listed in section 2.4.A5.1. However, in addition the time dependence of the multipoles has to be measured. The cold magnetic measurements are performed by operating the magnet at 4 K while the measuring equipment is working at room temperature. Four methods were selected for the various superconducting magnet types [108]: • Mole based approach for magnets operated at cryogenic temperatures: A mole is a rotating coil probe based magnetometer, where the main auxiliary components (the motor, the inclinometer and the angular encoder) form an entity (see Figure 2.4.158) able to operate in high magnetic field. • Search coils for bent dipole magnets, or magnets with warm iron and a warm bore (<strong>Super</strong>- FRS dipoles). • Rotating coils for quadrupole and corrector magnets with a warm bore: These instruments differ from the mole as only the coil probe itself is exposed to the magnetic field. • Stretched wire measurement for quadrupole or corrector magnet types, which are fabricated in small numbers. The stretched wire is versatile equipment and can cover the whole aperture of nearly any magnet (see Figure 2.4.1). Thus the <strong>Super</strong>-FRS dipole magnets will be measured using search coils providing data about the main field strength and the field homogeneity. The axis and angle will be provided by the pole shoes. The quadrupoles and correctors will be measured using rotating coils (see also Table 2.4.45). Both methods have been applied frequently at GSI in the past [109,110]. If the rotating coil cannot cover the whole field region due to the pole shoes, an additional stretched wire measurement can assert the quality there. The SIS 100 and SIS 300 magnets are supposed to be measured using the 199
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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
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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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DRAFT Figure 2.4.128: Schematic lay
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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
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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: DRAFT 3. Geometry tests For cryosta
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 211 and 212: DRAFT Figure 2.4.164: Schematic lay
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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