Welcome IMAC Members !

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Welcome IMAC Members !
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Report to IMAC Hesheng Chen

• Progress of BEPCII Accelerator
• Status of BESIII
• Summary

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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,

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BEPC running finished July 4, 2005
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Milestones in the shutdown

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

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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

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Progress of Linac

• Tuning Phase I
• e available at the end of Linac March 19, 2005
• e reached 63mA _at_ 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

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Linac commissioning (April-06)
Parameters Parameters Goal Measured
Beam energy (GeV) Beam energy (GeV) 1.89 1.89 (e-) 1.89 (e)
Beam current (mA) e 40 63
Beam current (mA) e- 500 gt 500
Repetition rate (Hz) Repetition rate (Hz) 50 25-50
Emittance (1s) ( mm?m rad ) e 0.53 0.32 0.20
Emittance (1s) ( mm?m rad ) e- 0.067 0.080 0.096
Energy spread () e ? 0.50 ?0.73_at_1.30GeV (?0.50_at_1.89Gev)
Energy spread () e- ? 0.50 lt ?0.80_at_1.30GeV lt (?0.55_at_1.89Gev)
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Linac Tunnel and Klystron Gallery
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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

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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

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Simulation of installation
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Installation of half unit (15-17.5 tone) by air
beds
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Challenges
IMAC May 2005

• 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 _at_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

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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.

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Difficulties

• The teams of cryogenics system and SC devices
  are limited and shortage 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

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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.

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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.

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BEPCII Summary Schedule
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Linac Plan and Installation of Ring
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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

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The BESIII Detector
SC magnet
Magnet yoke
TOF
Be beam pipe
MDC

CsI calorimeter
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Draft Chamber Structure
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Wiring of Draft chamber
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MDC inner part outer part
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Wire Tension Distribution
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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

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CsI crystal Calorimeter
France Sanit -Gobain Shanghai Institute of Ceramics Beijing Hamamatsu Total
Order 2040(3000) 1920 1320 5280(6240)
Arrived 1727 1920 1220 4860
Rejected 43? 7240? 20 70240?
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Calorimeter electronics

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

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Installation of RPC into endcap
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Mass production ---- Module test
Test result of an endcap module after install
Test result of a barrel module
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BESIII Magnet Progress
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• Valve box of BESIII SC magnet
• Power leads thermal leakage

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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

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Cryogenics system
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Gas tanks and pipes
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TCF50s passed assessment
?? 150L/h 500W_at_4.5K
???? 14bar,78g/s
???????
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Cryogenics pipes made in IHEP
???????
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??G10???
8??????
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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