Technical Design Report Super Fragment Separator

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DRAFT implementation for the digital interface that allows slow control and experiment data transfer from and to FEE boards already exists and is in use; the GTB-BUS a GSI development. (c) Inhomogeneous DAQ systems: From our operating experience we know, that especially the large gamma arrays come with their own customized DAQ systems. As has been seen e.g. for the RISING [85] experiments at the FRS, a certain flexibility of the host (here the NUSTAR) DAQ system is mandatory to couple these systems together. The development and implementation of the TITRIS timestamp module together with the time-ordered writing to mass storage within the MBS framework is an example for such integration efforts. Implementation: As a first step it is planned to implement a standardized front-end electronics (e.g. for the R³B/CAVEC) for fast signals. It will consist of a taquila [39] front-end board that has been developed for the upgrade of the FOPI experiment at GSI. These boards can be used to record 16 channels of time-signals, amplitude- or charge-signals at a moderate channel cost of about 50-60€. As interface to the detector additional FEE (e.g. [86]) boards are used, that are used to amplify, shape and split the signals prior to their input the digitizer board. Such a system can be thought of being already a replacement for a full, e.g. NIM based pre-amplifier, discriminator and CAMAC/FASTBUS based digitizer chain. The taquila boards provide also a simple time stamp mechanism. We will study the behaviour of such a system within the next two years at the R³B/CAVEC setup using the LAND neutron-detector readout as reference implementation. Further R&D steps will be accomplished to come to a fully operable FEE environment. The FEE is digitally attached via the GTB bus to a VME based processor board [87] that can be used to control the FEE readout process and to perform online data reduction (see Figure 2.4.138). Figure 2.4.138: Block diagram of the VME based SAM3 processor board. Two TMS320C6711 digital signal processors running at 100 MHz are used. It is foreseen to provide this module’s functionality within the framework of the NUSTAR DAQ system. Requests: Apart from the R³B/FAIR experiment that will be the continuation of the R³B/CAVEC 156
DRAFT experiment the EXL community has already come up with detailed requests to the NUSTAR DAQ group. The EXL front-end electronics which includes the ADC will have its own Time stamp & slow control facilities. The slow control facilities will allow a level of hard and software debugging. The slow control will allow the modification of e.g. the sub-trigger, choice of pre-amplifiers and amplifiers, the shaping, the gain, discriminators, sampling, ADC functions, calibration and test sequences, cable redundancy, high voltage, and bias settings. The structure required to manage the above should, is requested from the NUSTAR DAQ system. Apart from the control aspects, also the data collection chain from the digitized data has to be implemented, where the expected data rates for both experiments are approaching the 100 MBytes/sec limit. Controls: We foresee two kinds of data from the experiments: event-wise data that is taken with the physics and control triggers and what we call slow control data, like scaler readouts, beam profiles and so on. These data are of interest for the distributed slow control system throughout the NUSTAR facility and the accelerator. For this example, profile data may be taken to generate a feedback loop in order to perform automatic beam steering, whereas scaler data can provide information on the sanity of the particular setups. Of particular interest are fast control loops based on digital signal processing techniques, that can be already implemented in FPGA based front-end readout cards, coupled to slow control processes via e.g. a on board processor. The available processing power allows for an optimization of already single detector channels on-line so that the setup time can be drastically reduced. Such systems are currently tested for pile-up rejection and correction, pulse shape discrimination and intelligent adaptive triggering. 2.4.A1.1 Time and trigger distribution systems As can be seen from the above discussion one of the main infrastructures delivered by the NUSTAR DAQ framework will be a hierarchical time distribution system. Existing architectures for large scale time and trigger distribution systems are given e.g. by the TTC for LHC experiments [88], or the TCS [89,90] build for the COMPASS experiment, both at CERN. The Accelerator Division is currently working on a next generation timing system [91]. A Prototype system is available since mid 2007 and is being built by Work µ-wave GmbH. The activity was originally prompted by the requirement of the PHELIX experiment to synchronize a laser shot with the arriving pulse to a precision of 100 ps, thus the internal name "BuTiS" for 'Bunchphase Timing System'. This scope has of course widened, the objective is now to provide the timing reference for all FAIR accelerator components, and if there is interest, also the experiments. The currently available prototype system provides an absolute precision of 100 ps for the timestamps across the whole GSI site, and a timing jitter of well below 10 ps. The system is used as campus reference for standard frequencies (currently under evaluation are 200 MHz and 10 MHz) and standard time (UTC) which can be derived from a GPS based reference or a labelling of certain pulses via accelerator controls. In addition, auxiliary information channels are foreseen which will provide for example triggers for specific accelerator events. Local time-stamps: A campus wide synchronisation method allows for common timestamps between different experiments. The common clock is not enough on its own for full synchronisation - one needs to be able to correlate particular clock edges with particular values of the timestamp counters in order to start from the same timestamp value everywhere. Existing local time distribution systems like e.g. the GSI TITRIS [92] modular, which is similar to the CENTRUM built by GANIL [93] and also the proposed AGATA GTS [94], have to be adapted to allow for the 157
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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
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 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: 2.4.A Appendix DRAFT The appendix o
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
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
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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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