IREN project status

1. IREN project status JINR Scientific Council 103-d session

2. 2007 results on 1-st stage of IREN project and plans for 2008 • Working projects of water/power supply, fire prevention, and other systems were finished, necessary equipment manufactured or purchased; • Until March 2008 all engineering infrastructure in accelerator building will be installed; • Main control room was repaired and equipment is assembling now; • About 80% of LUE-200 equipment was mounted on site, partly tested and certified; • Klystron TH2129 was coupled with pulse transformer from SLAC 5045 Klystron and tested; • Magnetic measurements of the solenoid of first accelerating section were completed; • Time schedule with startup of the 1-st stage of IREN facility in November 2008 was approved by JINR Directorate JINR Scientific Council 103-d session

3. Results on 1-st stage of IREN project Radial (in the center) and longitudinal (on the right) components of the magnetic field in the solenoid of first accelerating section. Br/Bz < 0.5% JINR Scientific Council 103-d session

4. Results on 1-st stage of IREN project 1-st accelerating section and correcting coils installed inside solenoid. UHF feeder assembled High current power supply for solenoid JINR Scientific Council 103-d session

5. Results on 1-st stage of IREN project TH2129 klystron was coupled with pulse transformer from SLAC 5045 klystron, successfully tested on stand and transported to the accelerator hall on January 16. JINR Scientific Council 103-d session

6. Results on 1-st stage of IREN project IREN main control room: control equipment under assembling and adjustment JINR Scientific Council 103-d session

7. dN/dE [rel.] E [MeV] SLAC 5045 TH2129 IREN 1-st stage parameters with TH2129 Klystron Electron beam energy spectra JINR Scientific Council 103-d session

8. IREN 1-st stage parameters with TH2129 Klystron • Max. electron energy – 75 MeV • Av. electron energy – 50 MeV • Pulse current – 2.8 A • Pulse width – 200 ns • Repetition rate – 50 Hz • Beam power – 1.4 kW • Neutron intensity – ~31012 n/s JINR Scientific Council 103-d session

9. Time schedule for 2008 JINR Scientific Council 103-d session

10. Time schedule for 2008 JINR Scientific Council 103-d session

11. Time schedule for 2008 JINR Scientific Council 103-d session

12. H2O 111In 117mSn 117mSn Al e- Ti Pt, or W Gamma spectra from natural tin sample Gamma spectra from enriched tin sample e- H2O IREN 1-st stage Experimental Program POSSIBILITY OF TIN-117m PRODUCTION JINR Scientific Council 103-d session

13. IREN 1-st stage Experimental Program MULTIELEMENTAL PHOTON ACTIVATION ANALYSIS Elements determined by track method using photoneutrons Elements determined by IPhAA JINR Scientific Council 103-d session

14. IREN 1-st stage exp. program: (n,p), (n,alpha) reactions investigations at high energy JINR Scientific Council 103-d session

15. Conclusion • Consequences of the klystron SLAC 5045 damage were diminished by replacement with TH 2129 one keeping almost the same beam power at lower energy. • In spite of relatively low intensity, IREN first stage, due to short pulse, is giving us possibility to make certain experiments in high neutron energy range. • Significant gamma rays intensity in wide energy region (10 – 100 MeV) makes realistic extensive program of applied research. • Financial resources, allocated within JINR budget, are sufficient for project completion. • Project management and FLNP Directorate ask SC to support the decision of JINR Directorate and PAC on Nuclear Physics on prolongation of the topic “Construction of the IREN facility” for 2008 with the first priority and hopes for realization of the expected results in current year. JINR Scientific Council 103-d session