Welcome IMAC Members !

1. Welcome IMAC Members !

2. Report to IMACHesheng Chen • Progress of BEPCII Accelerator • Status of BESIII • Summary

3. BEPC running ended July 4 2005 • SR running finished at 20 June 20, 2005 • SR running: 3009 hour. • 362 experiments, 1087 users • 1751 hours for test beam & slow e+ source • Machine studies: • high beam current, • e+ injection, • transverse feedback, • BPM, • response matrix, • …

4. BEPC running finished July 4, 2005

5. Milestones in the shutdown • Pre-alignment of half units started 17 May 2005 • Remove old ring : July 4 – Aug. 5, 2005√ • Survey network in tunnel for magnet alignment Aug. 6 – Sept. 5, 2005 √ • Decoration tunnel: Aug. 25 – Sept. 22, 2005√ • Transformer &Electricity upgrade, new water pipes, cabling: Sept. 23, 2005 – Mar. 2, 2006 √. • Installation of two rings: started 2 March, 30 units installed until today.

6. Delays in delivery and installation of some key devices • SCQ: • delivery delayed about 6 month • Installation: more delay • SCQ Valve boxes : • delivery delayed about 4 month • more delay installation • Power Leads & valve boxes of BESIII SC magnet. • Antechamber depressed:

7. Progress of Linac • Tuning Phase I: • e+ available at the end of Linac March 19, 2005 • e+ reached 63mA @ 1.3GeV June 1, 2005 • e- reaches 1.89 Gev & e+ 1.55 GeV June 17,2005 • Repetition rate 12.5Hz →25Hz → 50Hz • Shutdown July 4, 2005 – Feb. 28, 2006 • Phase control system installed • Microwave system improved • Vacuum system improved • Stability of Linac and beam • Tuning Phase II: March 1 – July 30, 2006

8. Linac commissioning (April-06)

9. Linac Tunnel and Klystron Gallery

10. Progress of Storage Ring • Mass production of most components finished • 2 superconducting RF cavities, • 2 RF power sources (250kW), • 2 superconducting quards, • 49 dipoles, 89 quadrupoles, • special magnets in IR, • 300 power suppliers of magnets, • 4 sets of injection magnet system, • 80 antechambers. • Instrumentations of beam diagnostics and control in good progress. • In progress: • the vacuum chambers of straight sections, • photon absorber • movable mask …

11. Progress of Storage Ring • Critical path: • superconducting IR magnet, • pre-alignment • cryogenic system/SC devices integrating. • Most of the hardware are in the stage of installation, testing and commissioning. • Installation of pre-aligned magnet unit (B,Q,S with one girder) into the tunnel started March 2. 30 units installed

12. Simulation of installation

13. Installation of half unit (15-17.5 tone) by air beds

15. IMAC May 2005 Challenges • Cryogenics system: critical path • Linde compressors and cryogenics arrived • Gas tanks, He gas pipes, N pipes: done • critical path : valve box, system tuning • SC devices: critical path • SC Magnets production @BNL: small delay • SC cavities: arrived IHEP last week. • BESIII SC magnet: winding to be finished in 10 days. Assembling / testing? reach the specifications ? • Uncertainty in system tuning • Field mapping

16. IMAC report (May, 205) • There are apparent discrepancies between the schedule used by the project office and the one used by the group leaders. • The completion of the cryogenic system can not be accurately predicted due to the delivery of connection box from HIST and completion of transfer lines. So far, there is about 3 months delay. • The delivery of vacuum chamber and the Ti-N coating also encountered possible delay of about 3 months and with no effective plan of recovery. • Commissioning of all three SC components, SCQ, SRF, SSM also will be delayed by more than 3 months caused by the delay of completion of the cryogenic system. More `experienced` manpower is needed to complete the design and installation of the cryogenic transfer lines and smooth start up of the cryogenic system. • The time allowed for combined field measurement with SCQ and SSM in place appears too tight.

17. Difficulties • The teams of cryogenics system and SC devices are limited andshortage of experiences. However, Many helps from experts of DESY and KEK, the teams are shaping. • Poor performance of HIT Inst. of SCC: delay, bad cooperation and poor management • BESIII SC magnet: Wang NMR Co. in some troubles • We could handle other problems, such as mechanics, control, electronics…

18. Spare Scheme of IR • Delay & uncertainties of IR devices commissioning : • SCQ + Valve boxes: later arrival and delay in installation • BESIII SC magnet • Possible further delay in installation, commissioning and filed mapping • A spare scheme of the IR lattice configuration without SCQ is designed and under preparation . • Two normal conducting bending magnets (70B) will replace the two SCQ IR magnets. • With this scheme, the outer ring (SR), the electron ring and positron ring can be commissioned. • The spare scheme is to save the time of about 3 months for the SCQ field measurement with detector solenoid and the field mapping of the detector solenoid itself.

19. Quality Control • Quality control system established: • Quality control manuals • Quality control forms • Quality controller • Review designs and prototypes • Monitor quality and progress in factories • Most of cases are successful, while some cases have problems in quality and schedule for various reasons. • In case of problem, quality is the first. • Over design happens some times.

20. BEPCII Summary Schedule

21. Linac Plan and Installation of Ring

22. Schedule • — 9 Oct. 2006: • Installation of two rings • Tuning and commissioning of devices and systems, including SCQ commissioning and field mapping • Alignment • Oct. 06 - July. 07: • Tuning of machine + SR running • Field mapping of SCQ + BESIII SC magnet • BESIII assembling and tuning • Aug. 07: BESIII detector moved into beam line • Sept. 07 : Starting machine-detector tuning. • Data taking by Autumn 2007

23. The BESIII Detector SC magnet Magnet yoke TOF Be beam pipe MDC CsI calorimeter

24. Draft Chamber Structure

26. Wiring of Draft chamber

27. MDC: inner part outer part

28. Wire Tension Distribution

29. MDC electronics • 160 channel prototype system comics ray test and test beam • 512 channel system: final version • Oct. 2005 intl. review • Mass production under way

30. CsI crystal Calorimeter

31. Calorimeter electronics • FE under production • 3 beam test and and 384 channel prototype: reach the performance. Noise: 1000 e/crystal 。 • Intl. review • On schedule

32. Installation of RPC into endcap -- 32 --

33. -- 33 --

34. Mass production ---- Module test Test result of an endcap module ——after install Test result of a barrel module

35. BESIII Magnet Progress 绕线 包绝热膜 组装 安装 运输

37. Valve box of BESIII SC magnet Power leads thermal leakage

38. -- 38 --

39. BESIII: work to be done • Challenge: BESIII SC magnet • Power Leads • Test of Valve box • Cool down of Magnet • Performance & Stability • Field mapping • Under construction • Structure of ECAL endcap • Assembling of subdetectors • Assembling BESIII • Tuning • Cosmic ray test

40. Cryogenics system

41. Gas tanks and pipes

42. TCF50s passed assessment 冷箱 150L/h 500W@4.5K 主压缩机 14bar,78g/s 低温系统控制室

43. Cryogenics pipes made in IHEP 各种低温外管道 各种低温内管道 各种G10支撑件 8通道低温管线

44. Summary • LINAC tuning goes smoothly with good progress. • Manufacture of most of components of Storage rings and detector goes well. Some delays and technical difficulties in SC components. • So far, no fundamental problem found in the machine and the detector. • We are in a difficult period with many problems in quality and schedule. Great challenges in next 18 month. • About 4 month delay in schedule so far. • Thank you for helps from IMAC and many Labs