CRYRING@ESR - Facility for Antiproton and Ion Research

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16 Chapter 5. CRYRING as Test Bench for FAIR for following reasons: • A new stack of control system solutions for FAIR can be implemented and tested without ensuring full compatibility and coherency with the existing control system at any time during development. Some of the new control system design principles for FAIR are fundamentally different from the present GSI system (e.g. new beam and cycle concept, replacement of the Virtual Accelerator concept by a more general and flexible one). With CRYRING, these new solutions can be tested in an almost isolated environment in a system comprising almost all kinds of accelerator systems (ion source, linear accelerator, beam lines, synchrotron and storage ring) and without the constraints and having to reimplement specific GSI functionality of the existing system (e.g. therapy mode, equipment status concept, etc.). • CRYRING as a stand-alone machine can provide more machine development time for control system and equipment tests with much less organizational overhead than at UNILAC, SIS, and ESR. • The present GSI accelerator chain will experience a strongly reduced operation time in the coming years (e.g. 3–4 months of operation per year only) and machine time for control system tests will be quite limited. Machine operation times will be highly dedicated to machine development (MD) activities as well as detector tests for FAIR. Since beam time will be rare, a very stable and reliable control system is essential. This situation would be in contradiction with the strategy to implement novel solutions and evaluate them during longer runs. New solutions cannot provide the same level of robustness and availability from the beginning on. It is to be expected that failures will occur. The opportunity of dedicated MD runs at an independent ion beam facility will allow to solve and fix these rollout problems with a minimal disruption of the precious beam time operation of the GSI accelerators. Practically, the strategy of the controls department would be as follows: Many of the control system solutions needed for CRYRING modification are necessary for FAIR anyway. These are presently already under development or will be developed in the course of the FAIR project. These include front-end software equipment classes, generic operator applications, timing system, setting generation software, etc. It is expected that these solutions can be adapted to CRYRING with only moderate effort. As soon as these solutions are available, they can be implemented in CRYRING for tests. First activities would be to implement the new control system environment designed for FAIR in parallel to the CRYRING installation. This environment will be the base for all control system components including those of the beam diagnostics and available for component and integration tests. Deeper understanding and more investigation of the present CRYRING control system is needed to determine which subsystems can be replaced by corresponding FAIR developments. The following list indicates some examples: Equipment control for power converters with DC, pulsed and ramped operation. The FAIR Standard Control Unit SCU with respective Front End Standard Architecture FESA equipment class developments is the adequate solution. Controller prototypes and engineering samples under development for FAIR can be used. Timing system would be replaced by the facility-wide new General Machine Timing system. Modifications to the timing system are needed anyway for beam transfer from ESR. Bunch to bucket transfer can be implemented and studied for the bunch transfer from SIS18 to
5.3. Beam Diagnostics 17 SIS100 as well as from SIS100 to CR and from CR to HESR for both the proton/antiproton and the radioactive ion beams. Setting generation system can be implemented based on the LHC Standard Architecture LSA framework as an example for a storage ring machine. Tests of the overall storage ring functionality are possible. Feedback from the users would be highly valuable. Generic operator control applications under development for FAIR can be reused for FAIR and valuable operator feedback can be collected and used for improvements. Functions of remote monitoring and manage control authority domains (main control room, local control room) can be tested. Using CRYRING for FAIR development tests will result in reduced commissioning effort and time for the control system once the FAIR machines need to be commissioned. Moreover, early testing allows for better and more stable solutions and well tested operator application programs. In spite of all these benefits with respect to time and money savings, the control system solutions for FAIR cannot be implemented and tested in CRYRING without any additional financial effort and manpower. Technical coordination and necessary software adaptations will require one fulltime position being assigned to the controls department as early as possible after a positive management decision to implement CRYRING@ESR. A potential candidate has already been identified by the Atomic Physics department. For necessary electronic hardware adaptations, the vocational trainee group (Ausbildungsgruppe) in the controls department as well as the young technicians having completed their traineeship would be highly interested to get involved and contribute as well. Without further investigations and decisions about which subsystems to be replaced by FAIR solutions, only some rough cost estimates are given in Section 7.2. However, it can be assumed that for most dedicated hardware components of the control system prototypes and engineering samples of the FAIR developments could be used at no additional costs. 5.3 Beam Diagnostics A great part of the work necessary for the CRYRING beam diagnostics could be eased by applying soft- and hardware techniques foreseen for the FAIR project. All data acquisition (DAQ) systems, i.e. analog and digital electronics, controllers, digitizers, infrastructure systems etc., as well as the required software, should unconditionally apply FAIR standards, like FESA (Front-End Software Architecture) compatibility. Important: DAQ for beam diagnostics is part of the German in-kind contribution (EoI 13i) for FAIR. The GSI beam diagnostics department will deliver the complete set of DAQ systems for FAIR and has strong interest in using CRYRING as a test bench for ongoing hardware and software development projects. This strategy has the advantages of using CRYRING as a test bench for FAIR and the reusability of work load. The results obtained during CRYRING commissioning and test runs will confirm the development concepts and, in this way, improve the preparations for FAIR. The required manpower and budget for the FAIR-type realization of the CRYRING beam diagnostics will certainly entail additional expenses over a minimum cost/equipment solution (see Section 7.2) but these can be justified in view of the opportunity for testing new FAIR equipment under ‘live’ conditions.
Page 1: CRYRING@ESR: A study group report D
Page 4 and 5: 4 CONTENTS 6.7.2 Procurement of Mec
Page 6 and 7: 6 CONTENTS
Page 8 and 9: 8 Chapter 1. Introduction Moreover,
Page 10 and 11: 10 Chapter 2. Scientific Motivation
Page 12 and 13: 12 Chapter 3. CRYRING@ESR: Location
Page 14 and 15: 14 Chapter 4. CRYRING@ESR: List of
Page 18 and 19: 18 Chapter 5. CRYRING as Test Bench
Page 20 and 21: 20 Chapter 5. CRYRING as Test Bench
Page 22 and 23: 22 Chapter 6. Proposed Construction
Page 32 and 33: 32 Chapter 7. Project Steering reas
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Page 36 and 37: 36 BIBLIOGRAPHY [18] SPARC. Stored
Page 40 and 41: Prof. Dr. Horst Stöcker GSI Helmho
Page 44 and 45: 2(2) timely implementation of major
Page 47 and 48: Prof. Dr. Horst Stöcker GSI Helmho
Page 49 and 50: conditions, which will allow us to

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