Technical Design Report Super Fragment Separator

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DRAFT represents the iron part and the six small layers the coils of the hexapole magnet. The results for the beam catchers between the dipole magnets (BC1 and BC2) are similar to the ones at PF1 as the same thickness of the beam catcher can be used. The situation for the dipole magnet is in general less critical because the coils are not positioned in the same plane as the beam. 2.4.A6.2.3 Activation of beam line parts Many parts of the Super-FRS can be activated, especially in the Pre-Separator up to PF1. In the FLUKA simulation a cycle of four times irradiation at highest uranium intensity of 90 days with subsequent cooling time of 120 days was investigated. In the first part of the calculation the nuclides were produced and in the second part the radiation from activation is shielded by the matter in the same realistic geometry. From the radiation reaching the outside of the material blocks the effective dose rates from activation were calculated according to the dose conversion coefficients of the INPC [124]. Figure 2.4.172 shows the resulting dose rates in a vertical cross section around the beam catcher. As already described the iron part of the beam catcher is activated most. As only a small part of the beam reacts in the target the neutron flux above the target is much lower than at corresponding positions above the catcher and so is the activation. Figure 2.4.172: Cut through the area around the beam catcher BC1 where the primary beam is dumped after having passed the target. FLUKA simulation of the effective dose rate from activation after a cycle of four times irradiation at highest intensity of 90 days with subsequent cooling time of 120 days is shown. Whereas at the beam catcher the dose rate goes up to 5 Sv/h the level on the working platform reaches about 10 µSv/h at maximum. For the important part of the working platform the older simulation using PHITS [41] shows consistent results: In the concrete close to the maintenances channel on top of the target or beam 216
DRAFT catcher 7 Be, 22 Na and 24 Na are the most important nuclides for activation. After continuous irradiation over 100 days with 1500 MeV/u 10 12 /s uranium ions and one day of waiting the activity here reaches 160 Bq/cm 3 . As the strongest contribution 24 Na is rather short lived (T1/2 = 15 h) this value is reduced after 7 days to 30 Bq/cm 3 . The corresponding integrated dose rates at a distance of 50 cm above the concrete are 8 µSv/h or 2 µSv/h, respectively. The values are slightly lower as the floor was considered to be concrete and not iron. At PSI maintenance is carried out at the corresponding position with dose rates up to 100 µSv/h. As a conclusion the maintenance channel on top of the beam line from target to PF1 is accessible even after very long irradiation after a few days usually after one day of waiting. This is a reasonable time scale as anyway the concrete shielding on top has to be removed first. It also means that a plug with shielding as long as 200 cm is sufficient. The highly activated parts like beam catcher and target including the shielding plug can then be pulled into a shielding bottle like the one shown in Figure 2.4.174 used at a corresponding position at PSI. While the concrete shielding is removed the hall has to be an area of controlled access for radiation protection. But as the radiation level is rather low it is also clear that with the help of the shielding bottle the radiation level outside the hall cannot exceed the limit of 0.08 µSv/h explained above. A hot cell is foreseen to store activated components, inside manipulators will be used to exchange parts, for example to mount a new target wheel. Figure 2.4.173: Layout of the Super-FRS target building. The top part of the concrete shielding can be removed to access the working platform. Heavy devices can be transported by crane to the nearby hot cell, storage places or directly onto a truck which can drive into the hall. A typical value to still allow hands-on maintenance is 1 W/m for the beam power deposited by a 1 GeV proton beam along the beam line [125]. This value can be scaled to a heavy ion beam considering the shorter range and nuclear fragmentation [126]. As already described in section 217
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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
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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
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
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 211 and 212: DRAFT Figure 2.4.164: Schematic lay
Page 213 and 214: DRAFT Figure 2.4.165: An iron beam
Page 215: DRAFT In a side view the flux of pr
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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