1. Jürgen Florenkowski GSI, Darmstadt Agenda Annual Report Meeting EU construction ( CNI ) contract "DIRAC-PHASE-1" for the FAIR project September 26, 2006 Injection / extraction upgrade Task number SIS18- 4

2. Jürgen Florenkowski Upgrade Motivation Extraction We have to analyse the extraction in booster mode. Further investigations has to find out, where is the limitation for the acceptance. The first assumption is that the dipole chamber in front of the extraction channel is the reason for the limitation.

3. Jürgen Florenkowski Upgrade Motivation Injection (e – septum) The maximum field strength of the electrostatic septum is not sufficient for injection of U28 + - beams at the standard energy of 11.4 MeV/u (at present 7.1 MeV/u). Currently the electrostatic septum is not protected against beam losses in the injection channel. The new one has a scraper to protect the anode made of 0.1mm wires. Beam diagnostic is necessary to minimize the losses while injection from transfer channel to SIS. This is not present yet.

4. Jürgen Florenkowski Upgrade Motivation Inflector Magnet The acceptance limitation is given by the present inflector magnet in front of the injection septum. The present magnet is divided in 3 parts. A new development optimise the beam path to the limited space between transfer channel and SIS beam pipe. For the bake procedure we have to raise the coils from the beam pipe. Only then we are able to install the heating seal. After the bake procedure we have to reinstall the coils. The new inflector magnet has the heating seal build in. That minimize the time for service.

5. Jürgen Florenkowski The heavy ion synchrotron SIS 18 Injection septum Experiments SIS 18 UNILAC Extraction beam line Inflector magnet

6. Jürgen Florenkowski Main components of an e - septum Deflection unit High voltage power supply CathodeAnode Vacuum chamber

7. Jürgen Florenkowski Parameters of the e-septum ExistingNew Max. Voltage160 kV300 kV Field strength50 kV / cm80 kV / cm Back ableUp-to 150 degreeUp-to 300 degree Gap width max.3 cm DiagnosticsNoneBeam profile monitor ProtectionNoneScraper Comparison of existing and new e-septum

8. Jürgen Florenkowski Design values: Voltage:300 kV Gap width:3 cm Field strength max.:100 kV / cm Deflection angle:2.5 ° Electrostatic field calculations AnodeCathode SIS 18 UNILAC

9. Jürgen Florenkowski Septum design Design goals: Adjustable anode and cathode 300 kV insulation Back able up to 300 ° Beam diagnostic (profile monitor) Septum protection (scraper)

10. Jürgen Florenkowski Cathode surface treatment Requirements : 300°C back able surface Field strength 100KV / cm Cooperation with Fraunhofer Institut Elektronenstrahl- und Plasmatechnik Plasma activated high rate deposition of Aluminumoxid GSI will ship a test cathode of high-grade steel and aluminum in October 2006 After treatment GSI will test the maximum reachable field strength and heat the test cathode up to 300°C

11. Jürgen Florenkowski Option: electron - beam treatment Radiation facility 1 mm Stainless steel treatment Before After In parallel we have the treatment procedure with pulsed electron beams developed by the Institute of High current electronics in Tomsk (RU)

12. Jürgen Florenkowski Time schedule

13. Jürgen Florenkowski Costs e - septum Construction costs GSI Preliminary investigations and project analyses 110 h 3D – construction 470 h Drawings 2D 100 h Summary 680 h Manufacturing costs GSI and other companies Material 42.600€ Assembly 261h / 60€ 15.660€ Unexpected or additional work 21.847€ Summary 80.107€ Cathode Treatment Fraunhofer Institut Elektronenstrahl- und Plasmatechnik 20.900€ Institute of high current electronics in Tomsk (RU)200.000€ 300KV power supply Supplied by FUG and examined by GSI160.000€

14. Jürgen Florenkowski Inflector Magnet Present Design Inflector Magnet e - septumSIS beam pipe Device to raise the MagnetConnector side Rack

15. Jürgen Florenkowski New design Design goals Build in heating seal Optimized beam path SIS beam pipe Magnet Injection channelConnector box

16. Jürgen Florenkowski Inflector Magnet To finish the project inflector magnet we have to Fix the design We have to examine the offers from outside firms. The dead line for the offers was 22.09.06. Check the personnel involvement Cost estimate Commissioning parts Assembling the magnet Testing Installation