CRYRING@ESR - Facility for Antiproton and Ion Research

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14 Chapter 4. CRYRING@ESR: List of Parameters
Chapter 5 CRYRING as Test Bench for FAIR 5.1 Stand-Alone Operation of CRYRING As described in Chapter 3 the installation of CRYRING in the Target Hall in combination with the fragment separator (FRS) and the Experimental Storage Ring (ESR) would represent an attractive, novel facility for atomic and nuclear physics experiments. But CRYRING would also offer an ideal opportunity for testing important technical developments for FAIR under operating conditions. These tests could be performed even during longer shut down periods of SIS18, i.e. without beam from ESR. This is because CRYRING has its own injector and, therefore, can be operated as a stand-alone system. The low energy RFQ injector delivers ions with charge-to-mass ratio q/A ≥ 0.25 at a fixed specific energy of 0.3 MeV/u. The ion beam can be pulsed with repetition frequencies up to 5 Hz and pulse lengths smaller or equal 0.5 ms. Similar to SIS18, multiturn injection is applied to attain higher circulating beam currents. The stand-alone operation would preferably be applied for the commissioning of CRYRING after the completion of the ring assembly and the successful commissioning of all ring systems without ESR beam. For the test of FAIR technologies and components the use of the RFQ-injector seems to be the most suitable mode of operation. Test times would be available without any interference with the time-limited operation of the existing accelerators. Therefore, CRYRING could operate during the long shutdown period of about 18 months expected around the year 2015 and required for • linking the proton linac building to the injection channel TK of SIS18, • modification of the extraction channel of SIS18, • installation of the first part of the beam transport from SIS18 to SIS100, and • major upgrade work on the main control room. According to these considerations CRYRING would be an excellent, if not indispensable test bench for many important developments and technologies for FAIR. Its relevance for the success of the FAIR project with respect to time schedule and quality of operation is briefly discussed in the following. 5.2 Accelerator Controls Though CRYRING is not part of the FAIR modularized start version an installation at ESR would provide excellent possibilities for the controls and other technical departments to implement, test, deploy and evaluate the operational experience for improvements of the technical systems for FAIR. While it was always foreseen to implement FAIR control system solutions with the existing GSI machines (SIS18, ESR), CRYRING would provide even better conditions 15
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 16 and 17: 16 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
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Page 49 and 50: conditions, which will allow us to

CRYRING@ESR - Facility for Antiproton and Ion Research

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