Status of J-PARC Shoji Nagamiya J-PARC Center Japan Atomic Energy Agency (JAEA)

1. February 9, 2011 Workshop on 'Future Prospects of Hadron Physics at J-PARC and Large Scale Computational Physics' Status of J-PARC Shoji NagamiyaJ-PARC Center Japan Atomic Energy Agency (JAEA) High Energy Accelerator Research Organization (KEK)

2. Power Capability Previous Estimate Nov. 2003 Present Estimate for 3 GeV Big Earthquake J-PARCPower Expectation　[MW] 300 kW 1 hour Training Present Estimate for MR at 30 GeV KEK PS 3kW 145 kW 200 kW steady 115 kW steady Linac Energy Recovery 120 kW steady JFY2008 JFY2009 JFY2010 JFY2011 JFY2012 JFY2013 JFY2014

3. Indication of ne appearance (non-zero q13) 6 ne candidates found! Allowed region • Prob. of 6 are all BG: 0.7% (2.5s equiv) Chooz 90% upper bound Expected BG 1.5±0.3evts 3 (Dm232>0) (Dm232<0) 90%CL range Central value 3

4. Measurement of nm disappearance(Dm232, sin22q23) • Single-m ring events • 104 events expected w/o osc • 31 events detected (Analysis A) (Analysis B) Reconstructed n energy Dm2 (eV2) Analysis A Analysis B Number of Events Best-fit (Dm2, sin22q) Ana. A (2.6x10-3eV2 , 0.99) Ana. B (2.6x10-3eV2 , 0.98) Ratio sin22q 90% C.L. allowed region (GeV) Clear disappearance and oscillation pattern observed!! Consistent with MINOS/SK results

5. d - ー • positive evidences at low energy (LEPS, etc.) • very narrow width ~ 1 MeV. Why? • negative results at high energy s d u u E19 (Naruki et al.)Search for Pentaquark Q+ in p–pK–X reaction J-PARC E19 Physics Motivation • Hadronic “direct reaction” p- +p  K- + X • Previous (p-,K-) missing mass spectrum shows a hint of 2.6s. Peak??? 12±2 nb p(p-,K-) gd  K+ K- p n K++n Experiment to produce directly Q+ must be done. T. Nakano et al.,PRC79 (2009) 025210

6. LINAC-1 Immediately after the Earthquake We are getting water from an outside fire-hydrant, as original cooling water system has not yet been fixed. Outside of LINAC building is heavily damaged.

7. LINAC-2 Many pipes for supplying cooling water were damaged. Placing a temporal bridge for carrying in materials for repair.

8. LINAC-3 ・The floor level sagged 4 cm downward in the tunnel. Because accelerator cavities should be aligned within ±1 mm to each other along the beam line for the operation, they have been leveled and realigned where necessary. ・ Restoration work on the cooling water system and power supply is going smoothly. Realigned accelerator cavities of DTL and SDTL were tested for water-tightness.

9. 3 GeV Synchrotron (RCS) Immediately after the Earthquake Immediately after the Earthquake new old The bent stage was repaired. Power has been supplied to the RCS building. Tilted condenser transformers were straightened.

10. J-PARC Facility Materials and Life Science Experimental Facility Neutrino to Kamiokande 50 GeV Synchrotron (0.75 MW) Hadron Beam Facility ５００ｍ Nuclear Transmutation (Phase 2) 3 GeV Synchrotron (25 Hz, 1MW) Linac (330m) J-PARC = Japan Proton Accelerator Research Complex Joint Project between KEK and JAEA 2

11. Materials & Life Science Experimental Facility (MLF)-1 Immediately after the Earthquake A tilted He tank was removed to repair the foundation. The road was re-opened after filling depressions with pebbles. Inspection by the fire department

12. Materials & Life Science Experimental Facility (MLF)-2 Immediately after the Earthquake Reassembling work of shielding blocks for neutron beams in the 2nd experimental hall (above). Inspection of the inside of the muon beam facility after removing shielding blocks (right). This area does not have any serious damage.

13. Materials & Life Science Experimental Facility (MLF)-3

14. Neutrino Experimental Facility Immediately after the Earthquake AC device tilted toward a depression of a road. Many pipes were damaged Realignment work of electromagnets (above) and superconducting magnets (below) is progressing smoothly. We also try to improve cooling power. Repairing roads and plumbing have been completed.

15. Hadron Experimental Facility Immediately after the Earthquake Repairing roads and plumbing have been completed.

16. J-PARC Recovery Schedule（@2011.5.20） 2011 2012 2011 2012 456789101112123 Infrastructure Linac RCS MR MLF HD NU Emergency Recovery Full Recovery Work Beam Test User Operation Start Beam Commissioning Test with electricity Investigation Recovery Alignment MLF User Operation Test with electricity Investigation Recovery 3GeV synchrotron Cooling Water Test with electricity NU or HDOperation Investigation Recovery 50GeV synchrotron Investigation MLFUser Program Beam Injection Shielding recovery BL Components New Hg Target Materials&Life Experimental Facility Extended Building Investigation HDExperiment Hadron Experimental Facility Recovery Beam Injection Investigation NUExperiment Recovery Beam Injection Neutrino Experimental Facility

17. Main Buildings were almost OK Many underpins for major buildings. However, many utility buildings, roads, and added buildings had significant damage. We used approximately 50 Oku Yen from a regular operational budget. In addition, we received 14.2 Oku Yen (JAEA) for immediate use and 73.4 Oku Yen (KEK) for 3 yrs. When to recover ? Aiming at recovering by the end of this year. Obtained already a permission of 55 MW from Nov. Operation of Next Fiscal Year Aiming towards 9 cycle (200 day) operations for users. Summary before December 9th of 2011

18. Nov. of 2006. The first beam was on at the Linac. December 9, 2011 14:00 Beam went throughout the Linac at 3 MeV with RFQ acceleration. 09:30 Key was on.

19. Linac and 3 GeV Acceleration DCCT Horizontal Vertical Particles/pulse 2011/12/21 302 kW @ 3NBT Injection Extraction Final vacuum leakage test Linac Alignment Time (ms) Linac: Beam was ben in the middle This will be straighten up in the future. 3 GeV: Although magnets are declined inward, they will not be corrected before the summer of 2013.

20. Neutron on the Target After Earthquake Before Earthquake Unfortunately, the bubbler is no working properly, so that the neutron beam line can accept 100 kW atthe time of first beams. Old and New Targets

21. The first shot on target after the earthquake Adjustment on beam positon:12/22 After adjustment The first shot First shot reached on target because of the effort on realignment of 108 magnets in 3NBT.

22. Neutrino Events First Proton on Target On-site Detector events

23. First Beams to Hadron (1/28) 調整後、ビームは軸の中心を通った。

24. The First Beam to K1.8 オンラインモニタ を見る実験者たち ビームの信号をみる実験グループメンバー Beam=BH1⊗BH2 Beam⊗TOF Beam⊗LC⊗ACbar⊗TOF Veto=TOF⊗AC

25. Year 2012 Plans until March Year 2012 Jan. Feb. Mar.

26. JAEA Oku Yen Operational 83.50 8 cycles. JAEA direct = 5.29 Gov. Direct = 78.21 (+3.6 for cost increase of electricity) Equipment 14.90 14.5 for JAEA: 400 MeV Linac 0.4 for Gov. Direct.: 16 Oku total out of 3-year funding. Improvement 16.92 Linac + 3 GeV (final year of total 47.9) KEK Operational 66.18 6 cycles. The same as the last year. CROSS Operational 7.02 Almost the same as the last year. TOTAL 188.52 JFY2012 Budget

27. Construction Budget 2000 JAEA 2001 JAEA KEK JAEA KEK 2002 2003 JAEA KEK JAEA KEK 2004 2005 JAEA KEK 2006 JAEA KEK 2007 JAEA KEK 2008 JAEA KEK JAEA KEK 2009 JAEA KEK 2010 2011 JAEA KEK JAEA KEK 2012 200 180 160 140 Earthquake Recovery 120 Oku Yen (億円) 100 80 60 40 20 0 Fiscal Year (予算年度) Construction Started Completion of Phase-1 JAEA Construction JAEA After Construction JAEA Government Direct JAEA Government Supplemental KEK Construction KEK After Construction

28. Operational Budget 2005 JAEA 2006 JAEA KEK 2007 JAEA KEK 2008 JAEA KEK 2009 JAEA KEK JAEA KEK 2010 2011 JAEA KEK 2012 JAEA KEK 2013 JAEA KEK JAEA KEK 2014 2015 JAEA KEK 2016 JAEA KEK JAEA KEK 2017 JAEA Operational JAEA Government Direct KEK Operational 200 180 160 140 Full Power (9 cycles; 200 days) 6 cycles 120 5 cycles 6 cycles JAEA Goal Oku Yen (億円) 100 KEK Goal 8 cycles 80 70% of full request 60 40 20 0 Fiscal Year (予算年度) Completion of Phase-1

29. Extraction Efficiency 98.6% 99.5 % Extraction for Slow Beams Time Dependence of Beam Loss End of Extraction Start of Extraction Adjusting Dynamic Bump Extraction Efficiency 99.5 % Time Dependence of Beam Loss Stored Beam in MR End of Extraction Stored Beam in MR Start of Extraction

30. +1.8GeV/c We have observedcharged and neutral kaonsin the secondary beam lines (K1.8BR, K1.8 and KL) ofHadron Experimental Hall. K+ SKS π+ K0L→π+π-π0 K1.8 KL K1.8BR T1 target 30GeV proton beam

34. Hypernucleus Small (l・s) Force) Shallow Potential Difference? Difference? p ­ p p ­ 30 MeV d 1/2 3/2 s s ­ 50 MeV p 1/2 s Λ Λ m Ｎ L (l・s)surface> (l・s)interior Deep potential + Heavier mass ? Spin down particle Spin down particle m V l s L ･ r r r r nucleus nucleus Analyze Hypernuclear Spectroscoy with m ( r ), V ( r ) as two parameters ！ l s L ･

35. 5H 6LH glue-like role of L-hyperon p n n bound exotic hypernucleus unbound exotic nucleus n n p L n n n n insight into halo nuclear structure through hypernuclei ordinary nuclei L-hypernuclei DN SN S 77MeV L 290MeV N LN smallerDM S larger mixing S=-1 NN J. Schaffner-Bielich, Nucl. Phys. A804 (2008) 309 L N S=0 N contribution of S component and many body effect n-rich hypernucleus is a doorway to n-star

36. J-PARC BNL-AGS primary lines secondary lines Necessity for Hadron Hall extension • Too small area　 ⇔ 　KEK-PS x2.4, BNL-AGS x4.1 • Only 4 beam lines　⇔　 KEK-PS ~7 lines,BNL-AGS ~15 lines • -> Ineffective operation (“output per operation cost” is bad.) • Long waiting queue of approved experiments • (At K1.8/K1.8BR lines, 6960 hours= more than 6 years） • -> Discourage users in the world. Predominance will be lost. Extremely urgent ! First priority in nuclear physics community in Japan RIKEN is considering its funding!

37. Thanks